FCC ID: YZZGAC2500 Audio Conference Phone

Audio Conference Phone Grandstream Networks, Inc. GAC2500 Audio Conference Phone for AndroidTM User Guide GAC2500 User Guide Index CHANGE LOG .............................................................................................................................................. 9 FIRMWARE VERSION 1.0.1.X .............................................................................................................. 9 WELCOME .................................................................................................................................................. 10 PRODUCT OVERVIEW .............................................................................................................................. 11 FEATURE HIGHTLIGHTS ................................................................................................................... 11 SAFETY COMPLIANCES .................................................................................................................... 12 WARRANTY ......................................................................................................................................... 12 INSTALLING GAC2500 ............................................................................................................................... 13 EQUIPMENT PACKAGE CONTENT ................................................................................................... 13 PRODUCT APPEARANCE .................................................................................................................. 13 CONNECTING GAC2500 .................................................................................................................... 14 IP MODE ....................................................................................................................................... 15 USB SLAVE MODE ...................................................................................................................... 16 DAISY CHAIN MODE ................................................................................................................... 16 MOBILE PHONE MODE .............................................................................................................. 17 GETTING TO KNOW GAC2500 ................................................................................................................. 19 DESKTOP MENU ................................................................................................................................ 19 STATUS ICONS ................................................................................................................................... 19 USING THE ONSCREEN KEYBOARD ............................................................................................... 20 ENGLISH KEYBOARD ................................................................................................................. 20 CHINESE KEYBOARD ................................................................................................................. 21 NUMBERS AND SYMBOLS ......................................................................................................... 21 USING THE LED INDICATOR ............................................................................................................. 22 ASSISTIVE TOUCH .................................................................................................................................... 23 USING TOUCHSCREEN ..................................................................................................................... 23 SHORTCUT KEYS............................................................................................................................... 23 MANAGING STATUS BAR .................................................................................................................. 24 DESKTOP MENU ................................................................................................................................ 25 EDITING WALLPAPER................................................................................................................. 25 EDIT DESKTOP............................................................................................................................ 26 ADDING AN ITEM TO DESKTOP ................................................................................................ 26 MANAGING DESKTOP APPS AND ITEMS ................................................................................. 27 OPENING AN APP ................................................................................................................ 27 MOVING AN APP .................................................................................................................. 27 REMOVING AN APP ............................................................................................................. 28 MANAFERING APPLICATIONS ............................................................................................ 29 HOME SCREEN .................................................................................................................................. 30 Firmware Version 1.0.1.x GVC2500 User Guide Page 1 of 88 CONNECTING TO NETWORK AND DEVICES ......................................................................................... 32 NETWORK ........................................................................................................................................... 32 ETHERNET .......................................................................................................................................... 32 WI-FI .................................................................................................................................................... 32 TURNING WI-FI ON OR OFF ...................................................................................................... 33 BLUETOOTH ....................................................................................................................................... 33 TURNING BLUETOOTH ON OR OFF ......................................................................................... 33 PAIRING GAC2500 WITH A BLUETOOTH DEVICE .................................................................... 34 CONNECTING TO A BLUETOOTH DEVICE ............................................................................... 34 SENDING FILES VIA BLUETOOTH ............................................................................................. 35 VPN SETTINGS ................................................................................................................................... 35 VLAN SETTINGS ................................................................................................................................. 36 LLDP SETTINGS ................................................................................................................................. 36 802.1X MODE ...................................................................................................................................... 37 MAKING PHONE CALLS ............................................................................................................................ 38 ACCOUNT ........................................................................................................................................... 38 MAKING A CALL .................................................................................................................................. 38 DIRECT DIALING ......................................................................................................................... 38 REDIAL ......................................................................................................................................... 38 DIALING A NUMBER VIA CONTACT ........................................................................................... 39 DIALING A NUMBER VIA CALL HISTORY .................................................................................. 39 DIRECT IP CALL .......................................................................................................................... 39 PAGING/INTERCOM .................................................................................................................... 40 ANSWERING A CALL .......................................................................................................................... 40 CALL MANAGEMENT .................................................................................................................. 41 CALL HOLD AND CALL RESUME ...................................................................................................... 41 CALL HOLD .................................................................................................................................. 41 RESUME TO CALL ...................................................................................................................... 42 CALL RECORD.................................................................................................................................... 43 CALL TRANSFER ................................................................................................................................ 44 BLIND TRANSFER ....................................................................................................................... 44 ATTENDED TRANSFER .............................................................................................................. 45 CALL TRANSFER ................................................................................................................. 46 CALL FORWARD .................................................................................................................. 46 DND (DO NOT DISTURB) ................................................................................................................... 48 MISSED CALL ..................................................................................................................................... 49 CALL FORWARD ................................................................................................................................. 49 SET ON LCD ................................................................................................................................ 49 SET FROM WEB GUI ................................................................................................................... 49 7-WAY CONFERENCE ........................................................................................................................ 49 INITIATING CONFERENCE ......................................................................................................... 49 Firmware Version 1.0.1.x GVC2500 User Guide Page 2 of 88 CONFERENCE MANAGEMENT .................................................................................................. 52 INVITE MEMBERS TO CONFERENCE ............................................................................... 53 REMOVING MEMBER FROM CONFERENCE .................................................................... 53 THIRD PARTY APPLICATIONS ................................................................................................... 53 END CONFERENCE .................................................................................................................... 53 SCHEDULE ......................................................................................................................................... 54 VIEW CONFERENCE DETAILS .................................................................................................. 54 ADD SCHEDULED CONFERENCE ............................................................................................. 55 EDIT SCHEDULED CONFERENCE ............................................................................................ 56 RESCHEDULE CONFERENCE ................................................................................................... 56 DELETE SCHEDULED CONFERENCE ...................................................................................... 56 VOICEMAIL ......................................................................................................................................... 58 APPLICATIONS .......................................................................................................................................... 59 CONTACTS.......................................................................................................................................... 59 LOCAL CONTACTS...................................................................................................................... 59 ADD CONTACT ............................................................................................................................ 60 ADD SINGLE CONTACT ...................................................................................................... 60 BATCH IMPORT CONTACTS ............................................................................................... 60 SEARCH CONTACTS ........................................................................................................... 63 MANAGE CONTACTS .................................................................................................................. 63 DELETE CONTACT .............................................................................................................. 63 EXPORT CONTACTS ........................................................................................................... 63 SEND CONTACTS ................................................................................................................ 64 CONTACTS STORAGE STATUS .......................................................................................... 64 ADD GOOGLE ACCOUNT ........................................................................................................... 65 GROUPS ...................................................................................................................................... 67 ADD NEW GROUP ............................................................................................................... 67 CALL GROUPS ..................................................................................................................... 68 DELETE GROUP .................................................................................................................. 68 BLACKLIST .......................................................................................................................................... 68 LDAP .................................................................................................................................................... 70 BS CONTACTS .................................................................................................................................... 73 CALL HISTORY ................................................................................................................................... 73 ADD CONTACT FROM CALL HISTORY...................................................................................... 74 DELETE CALL HISTORY ............................................................................................................. 75 CONFERENCE SCHEDULE VIA CALL HISTORY ...................................................................... 75 MPK ..................................................................................................................................................... 75 EVENR LIST URL ................................................................................................................................ 76 FILEMANAGER ................................................................................................................................... 77 COPY FILE ................................................................................................................................... 77 SEND FILE ................................................................................................................................... 77 Firmware Version 1.0.1.x GVC2500 User Guide Page 3 of 88 DELETE FILE ............................................................................................................................... 77 RENAME FILE .............................................................................................................................. 77 RECORDER ........................................................................................................................................ 78 NORMAL RECORDER ................................................................................................................. 78 CALL RECORDER ....................................................................................................................... 79 RECORDER CONFIGURATION .................................................................................................. 80 DIAGNOSIS ......................................................................................................................................... 81 BROWSER .......................................................................................................................................... 81 GS MARKET ............................................................................................................................................... 82 SEARCH APPS .................................................................................................................................... 82 DOWNLOAD AND INSTALL APPS ...................................................................................................... 82 UPDATE APPS .................................................................................................................................... 82 GAC2500 WEB UI FEATURES ................................................................................................................... 83 ACCESSING GAC2500 WEB GUI ...................................................................................................... 83 SAVING CHANGES ............................................................................................................................. 83 DEFINITIONS ...................................................................................................................................... 83 CALL PAGE ......................................................................................................................................... 84 MAKING A CALL ........................................................................................................................... 85 CONFERENCE CONTROL .......................................................................................................... 85 CONTACTS PAGE ............................................................................................................................... 85 CONTACTS .................................................................................................................................. 85 GROUPS ...................................................................................................................................... 85 SCHEDULE .................................................................................................................................. 86 CALL HISTORY ............................................................................................................................ 86 EXPERIENCING GAC2500 ........................................................................................................................ 87 Firmware Version 1.0.1.x GVC2500 User Guide Page 4 of 88 Table of Tables GAC2500 User Guide Table 1 GAC2500 Technical Specifications .............................................................................................. 11 Table 2 GAC2500 Package List ............................................................................................................... 13 Table 3 GAC2500 Interfaces Explanations ............................................................................................... 13 Table 4 GAC2500 Status Icons Descriptions............................................................................................ 19 Table 5 GAC2500 LED Indicator Descriptions ......................................................................................... 22 Table 6 GAC2500 VPN File Parameters .................................................................................................. 35 Table 7 GAC2500 VLAN Configuration Parameters ................................................................................ 36 Table 8 GAC2500 LLDP Configuration Parameters ................................................................................. 36 Table 9 GAC2500 802.1X Mode Parameters ........................................................................................... 37 Table 10 GAC2500 Download Contacts Parameters ............................................................................... 63 Table 11 GAC2500 Export Contacts Parameters ..................................................................................... 64 Table 12 GAC2500 Blacklist Settings Parameters ................................................................................... 69 Table 13 GAC2500 LDAP Book Parameters ............................................................................................ 71 Table 14 GAC2500 Users Access Permissions........................................................................................ 84 Firmware Version 1.0.1.x GVC2500 User Guide Page 5 of 88 Table of Figures GAC2500 User Guide Figure 1 GAC2500 Host Interfaces .......................................................................................................... 13 Figure 2 GAC2500 Connection Mode ...................................................................................................... 15 Figure 3 GAC2500 Slave Mode Screen ................................................................................................... 16 Figure 4 GAC2500 Daisy Chain Mode Screen ........................................................................................ 16 Figure 5 GAC2500 Select line Screen ..................................................................................................... 17 Figure 6 GAC2500 Multi-screens ........................................................................................................... 19 Figure 7 GAC2500 Soft Keyboard - English Input Method ...................................................................... 21 Figure 8 GAC2500 English Keyboard-Uppercase .................................................................................. 21 Figure 9 GAC2500 Chinese Keyboard-Google Pinyin Method .............................................................. 21 Figure 10 GAC2500 Soft Keyboard-Symbols and Numbers .................................................................... 21 Figure 11 GAC2500 Soft Keyboard-More Symbols and Numbers ........................................................... 21 Figure 12 GAC2500 Finger Gestures ..................................................................................................... 23 Figure 13 GAC2500 Open Status Bar ...................................................................................................... 24 Figure 14 GAC2500 Status Bar-Notification ............................................................................................. 24 Figure 15 GAC2500 Idle Screen Menu .................................................................................................... 25 Figure 16 GAC2500 Choose Wallpaper ................................................................................................... 26 Figure 17 GAC2500 Weather Forecast Screen ....................................................................................... 27 Figure 18 GAC2500 Move Weather Forecast to Desktop ........................................................................ 28 Figure 19 GAC2500 Remove Weather Forecast from Desktop ............................................................... 29 Figure 20 GAC2500 Managing Applications ............................................................................................ 30 Figure 21 GAC2500 Home Screen .......................................................................................................... 31 Figure 22 GAC2500 Add Wi-Fi Screen ................................................................................................... 33 Figure 23 GAC2500 Bluetooth - Paired Device ....................................................................................... 34 Figure 24 GAC2500 Add VPN Files Screen ............................................................................................. 35 Figure 25 GAC2500 VPN Validation Screen .......................................................................................... 35 Figure 26 GAC2500 Registered Account Status ...................................................................................... 38 Figure 27 GAC2500 Single Incoming Call Screen ................................................................................. 40 Figure 28 GAC2500 New Incoming Call Screen .................................................................................... 41 Figure 29 GAC2500 Single Incoming Call Screen ................................................................................... 42 Figure 30 GAC2500 Call On Hold Screen ................................................................................................ 43 Figure 31 GAC2500 More-Start Recording .............................................................................................. 44 Figure 32 GAC2500 Transfer-Blind Transfer ............................................................................................ 45 Figure 33 GAC2500 Transfer-Attended Transfer ..................................................................................... 46 Figure 34 GAC2500 Call Forward-Select Forward Mode ........................................................................ 47 Figure 35 GAC2500 Call Forward-Transferring ....................................................................................... 48 Figure 36 GAC2500 Call Forward-Split .................................................................................................... 48 Figure 37 GAC2500 Call Forward Mode On Web GUI .......................................................................... 49 Figure 38 GAC2500 Manually Add Numbers To Conference ................................................................... 50 Figure 39 GAC2500 Add Party To Conference ........................................................................................ 51 Firmware Version 1.0.1.x GVC2500 User Guide Page 6 of 88 Figure 40 GAC2500 3-Way Conference .................................................................................................. 52 Figure 41 GAC2500 Schedule Screen ..................................................................................................... 54 Figure 42 GAC2500 Conference Details Screen ..................................................................................... 55 Figure 43 GAC2500 Add Conference Screen .......................................................................................... 55 Figure 44 GAC2500 Delete Conference Screen ...................................................................................... 57 Figure 45 GAC2500 Edit Conferences Screen ........................................................................................ 57 Figure 46 GAC2500 Voice Mail Application.............................................................................................. 58 Figure 47 GAC2500 Local Contacts Screnn ............................................................................................ 59 Figure 48 GAC2500 Add New Contact Screen ........................................................................................ 60 Figure 49 GAC2500 Import Contacts Screen ........................................................................................... 61 Figure 50 GAC2500 Import Contacts Parameters ................................................................................... 61 Figure 51 GAC2500 Download Contacts Screen ..................................................................................... 62 Figure 52 GAC2500 Export Contacts Screen ......................................................................................... 64 Figure 53 GAC2500 Contacts Status Screen ........................................................................................... 65 Figure 54 GAC2500 Account-Sync Interface ........................................................................................... 65 Figure 55 GAC2500 Add Google Account-Wizard 1 ................................................................................ 66 Figure 56 GAC2500 Add Google Account-Wizard 2 ................................................................................ 66 Figure 57 GAC2500 Groups Screen ........................................................................................................ 67 Figure 58 GAC2500 Add Group Screen ................................................................................................... 67 Figure 59 GAC2500 Dial Group Members Screen ................................................................................... 68 Figure 60 GAC2500 Edit Groups Screen ................................................................................................. 68 Figure 61 GAC2500 Blacklist Screen ....................................................................................................... 69 Figure 62 GAC2500 LDAP Book Screen ................................................................................................. 70 Figure 63 GAC2500 LDAP Settings ......................................................................................................... 71 Figure 64 GAC2500 Web GUI Maintenance-LDAP Book ........................................................................ 72 Figure 65 GAC2500 Add LDAP Contact To Local .................................................................................... 73 Figure 66 GAC2500 Call History Screen ................................................................................................ 74 Figure 67 GAC2500 Call History Details .............................................................................................. 74 Figure 68 GAC2500 Add MPK Number .................................................................................................... 75 Figure 69 GAC2500 MPK Number List .................................................................................................... 76 Figure 70 GAC2500 Add Number from Contacts ..................................................................................... 76 Figure 71 GAC2500 MPK Number Screen .............................................................................................. 76 Figure 72 GAC2500 Recorder Screen ..................................................................................................... 78 Figure 73 GAC2500 Normal Recorder ..................................................................................................... 78 Figure 74 GAC2500 Normal Record-Recording ...................................................................................... 79 Figure 75 GAC2500 Call Recordings ....................................................................................................... 80 Figure 76 GAC2500 Recorder Settings Screen ....................................................................................... 81 Figure 77 GAC2500 GS Market ............................................................................................................. 82 Figure 78 GAC2500 Web GUI-Login ........................................................................................................ 83 Figure 79 GAC2500 Web UI Tool Bar ...................................................................................................... 84 Figure 80 GAC2500 Web UI-Call ............................................................................................................. 84 Firmware Version 1.0.1.x GVC2500 User Guide Page 7 of 88 Figure 81 GAC2500 Web UI-Conference Control .................................................................................... 85 Figure 82 GAC2500 Web UI-Contacts ..................................................................................................... 85 Figure 83 GAC2500 Web UI-Groups........................................................................................................ 85 Figure 84 GAC2500 Web Page-Schedule ............................................................................................... 86 Figure 85 GAC2500 Web UI-Call History ................................................................................................. 86 Firmware Version 1.0.1.x GVC2500 User Guide Page 8 of 88 CHANGE LOG This section documents significant changes from previous versions of GAC2500 user manuals. Only major new features or major document updates are listed here. Minor updates for corrections or editing are not documented here. FIRMWARE VERSION 1.0.1.X This is the initial version. Firmware Version 1.0.1.x GVC2500 User Guide Page 9 of 88 WELCOME Thank you for purchasing Grandstream GAC2500 Audio Conference Phone for AndroidTM. This User Guide describes the basic concept and tasks necessary to use and configure your GAC2500. This document covers the topics of conference environment setups, start conference and the relevant operations like conference reservation. To learn the advanced features and configurations, please visit http://www.grandstream.com to download the latest "GAC2500 Administration Guide". GAC2500 is a next generation enterprise-grade 6-line Android IP conference phone with a 4.3" capacitive touch screen that that runs the Android Operating System and therefore offers full access to the hundreds of thousands of Android apps in the Google Play Store, including business productivity apps such as Skype, Skype for Business, and Google Hangouts. The phone features Gigabit ports, 7-way conference, 3x microphones, 1 Micro USB port, integrated Wi-Fi and Bluetooth for network flexibility. The GAC2500 delivers superior HD audio quality, rich and leading edge telephony features, automated provisioning for easy deployment, advanced security protection for privacy, and broad interoperability with most 3rd party SIP devices and leading SIP/NGN/IMS platforms. GAC2500 is a perfect choice for enterprise users looking for a high performance, feature rich conference phone with superb audio quality at competitive price.

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Caution:

Changes or modifications to this product not expressly approved by Grandstream, or operation of this product in any way other than as detailed by this User Manual, could void your manufacturer warranty. Warning:

Please do not use a different power adaptor with the GAC2500 as it may cause damage to the products and void the manufacturer warranty.

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This document is subject to change without notice. The latest electronic version of this user manual is available for download here:

http://www.grandstream.com/support Reproduction or transmittal of the entire or any part, in any form or by any means, electronic or print, for any purpose without the express written permission of Grandstream Networks, Inc. is not permitted.

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Firmware Version 1.0.1.x GVC2500 User Guide Page 10 of 88 PRODUCT OVERVIEW FEATURE HIGHTLIGHTS Runs Android 4.4 and offers full access to all Android conference apps in the Google Play Store

(e.g., Skype, Skype for Business, Google Hangouts, etc.) World-class high fidelity sound quality with audio bandwidth of up to 14Khz 4.3" capacitive touch screen LCD with support for flexible layout/content customization 3x microphones (12 ft. pickup range), 1x speaker (15 ft. coverage range) Auto-sensing Gigabit Ethernet port, Wi-Fi, PoE+, Bluetooth, Micro-USB with 3.5mm audio interface Supports standalone IP mode or USB slave mode Supports daisy chain (up to 2 units via RJ48 CAT5) mode in large conference room for better audio quality NAT-T enables the phone being the Plug and Play device Automated provisioning using TR-069 or AES encrypted XML configuration file, TLS/SRTP/HTTPS for advanced security and privacy protection Specification Description Table 1 GAC2500 Technical Specifications Protocols/

Standards Voice Codec SIP RFC3261TCP/IP/UDP RTP/RTCPHTTP/HTTPSARPICMPDNS (A record SRV NAPTR) DHCP PPPoE SSH TFTP NTP STUN SIMPLE LLDP LDAP TR-069 802.1x TLS SRTP IPv6 (pending) OpenVPN (pending) Support for G.711/a, G.722, G.726, iLBC, Opus, G.722.1, G.722.1c, in-band and out-of-band DTMF (In audio, RFC2833, SIP INFO) Platform Bridging Bridge SIP calls with any Android VoIP apps such as Skype, Skype for Telephony Features Sample Applications Application Deployment QoS Security Business (Lync), Google Hangouts and more Hold, transfer, forward (unconditional/no-answer/busy/conditional), call park/pickup, 7-way audio conference, auto answer, downloadable XML phone book (up to 2000 entries), LDAP, call waiting, call history (up to 500 entries), flexible dial plan, personalized music ringtones, server redundancy & fail-over

(Lync), Web browser, Skype, Google Hangouts, Skype Facebook, Twitter, YouTube, Google calendar, mobile phone data import/export via Bluetooth, etc. API/SDK available for advanced custom application development Allows Android 4.4 compliant applications to be deployed in the device with provisioning control Layer 2 QoS (802.1Q, 802.1p) and Layer 3 (ToS, DiffServ, MPLS) QoS User and administrator level passwords, MD5 and MD5-sess based authentication, 256-bit AES encrypted configuration file, TLS, 128/256-bit SRTP/TLS, HTTPS, 802.1x media access control for Business Multi-Language English, German, Italian, French, Spanish, Portuguese, Russian, Turkish, Polish, Firmware Version 1.0.1.x GVC2500 User Guide Page 11 of 88 Chinese, Korean, Japanese, and more Upgrade/

Provisioning Network Interface 1x auto-sensing Gigabit Ethernet port, integrated 2.4GHZ auto-band Wi-Fi and 3.0 Firmware upgrade via TFTP / HTTP / HTTPS or local HTTP upload, mass provisioning using TR-069 or AES encrypted XML configuration file Bluetooth. 3x microphones (12 ft. pickup range), 1x speaker (220-14,000 Hz, 15 ft. coverage range up to 86dB ) 3.5mm audio interface, Micro-USB interface, RJ48 interface, reset pin 4.3"(800*480) capacitive touch screen LCD Universal power adapter included: Input: 100-240VAC 50-60Hz; Output: 12VDC, 2A

(24W) Operating: 32 - 104oF / 0 - 40oC Storage: 14 - 140oF / -10 - 60oC Humidity: 10% to 90% Non-condensing FCC: Part 15 (CFR 47) Class B; UL 60950 (power adapter) CEEN55022 Class BEN55024EN61000-3-2EN61000-3-3EN60950-1 EN62479RoHS RCMAS/ACIF S004AS/NZS CISPR22/24AS/NZS 60950AS/NZS 4268 HD Audio Auxiliary Ports Graphic Display Power & Green Energy Efficiency Temperature and Humidity Compliance SAFETY COMPLIANCES The GAC2500 complies with FCC/CE, RCM and various safety standards. The GAC2500 power adapter is compliant with the UL standard. Use the universal power adapter provided with the GAC2500 package only. The manufacturers warranty does not cover damages to the phone caused by unsupported power adapters. WARRANTY If the GAC2500 phone is purchased from a reseller, please contact the company where the device is purchased for replacement, repair or refund. If the phone is purchased directly from Grandstream, please contact Grandstream Support for a RMA (Return Materials Authorization) number before the product is returned. Grandstream reserves the right to remedy warranty policy without prior notification. Firmware Version 1.0.1.x GVC2500 User Guide Page 12 of 88 INSTALLING GAC2500 EQUIPMENT PACKAGE CONTENT The GAC2500 package contains the following items:

Table 2 GAC2500 Package List Name Number GAC2500 Main Case 12V Universal Power Adapter with power cable 5m Ethernet Cable 1.5m Micro-USB Cable 5m RJ48 CAT5 Lens Cleaning Cloth Quick Installation Guide GPL license 1 1 1 1 1 1 1 1 PRODUCT APPEARANCE Figure 1 GAC2500 Host Interfaces Table 3 GAC2500 Interfaces Explanations NO. Name Explanation Firmware Version 1.0.1.x GVC2500 User Guide Page 13 of 88 RJ48 Interface RJ45 Network Interface 12V DC Power Supply Interface Micro USB Interface 3.5mm Audio Interface Reset Pin Daisy chain (up to 2 units via RJ48 CAT5) mode in large conference room for better audio quality Connect to LAN port Connect to Power Adaptor USB storage devices can be connected to the USB Interface via USB cable. For example, connect a USB flash drive to read data. Connect to 3.5mm devices like mobile phone or PC for mobile audio pickup and play When the GAC2500 is powered up, use a small pin to press When powering up GAC2500, long press the button for 4 to the button one time to reboot. 9 seconds to update system. When powering up GAC2500, long press the button for more than 10 seconds to restore to factory settings. CONNECTING GAC2500 To deploy a working conferencing system, users could select standalone IP mode, USB slave mode, daisy chain mode or mobile phone mode. Please connect the GAC2500 for each mode according to different procedures. Firmware Version 1.0.1.x GVC2500 User Guide Page 14 of 88 Figure 2 GAC2500 Connection Mode IP MODE The GAC2500 is used as an independent phone in IP mode. 1. Connect one end of the Ethernet cable to the LAN port of the device and the other end to the external network port (the port in the office or at home);

2. Plug in the power adapter into the power supply interface. Power up the GAC2500.

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Firmware Version 1.0.1.x GVC2500 User Guide Page 15 of 88 Note:

It is recommended to use IP mode in room 7m*10m or smaller.

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USB SLAVE MODE GAC2500 can be used as auxiliary device for GVC3200 or PC for audio pickup and play. The conference feature will be disabled in USB slave mode. Follow the procedures below to connect GAC2500. 1. Connect one end of the USB cable to the Micro USB port of the device and the other end to the USB port of GVC3200/PC;

2. Plug in the power adapter into the power supply interface. Power up the GAC2500. The GAC2500 screen is as shown below in USB slave mode, you can tap on the volume icon on screen to adjust the volume of GVC320/PC. When connecting to GVC3200, tap on "Mute", "Answer" or "Hangup"

icons for more operations. Figure 3 GAC2500 Slave Mode Screen DAISY CHAIN MODE Connect two GAC2500 via RJ48 CAT5 for larger space. 1. Connect one end of the Ethernet cable to the LAN port of the first device and the other end to the external network port (the port in the office or at home);

2. Connect one end of the RJ48 CAT5 to the RJ48 port of the first device and the other end to the RJ48 port of the second device;

3. Plug in two power adapters into the power supply interfaces. Power up two devices. 4. The screen is as shown below. Tap on "Yes" on the first device and set it to be the master while the other the slave.

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Figure 4 GAC2500 Daisy Chain Mode Screen Firmware Version 1.0.1.x GVC2500 User Guide Page 16 of 88 Note:

It is recommended to use daisy chain mode in room 7m*10m or smaller. 1. 2. Please keep a distance of 5m among two devices. 3. Please make sure the network is connected for the master device or it may unable to work properly. 4. The slave device will synchronize with the master device, while their call screen will be shown synchronously.

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MOBILE PHONE MODE GAC2500 could be connected to mobile phone for expanded use. Follow the procedures to connect. 1. Connect one end of the Ethernet cable to the LAN port of the first device and the other end to the external network port (the port in the office or at home);

2. Plug in the power adapter into the power supply interface. Power up the GAC2500. 3. Connect 3.5mm headset interface on the mobile phone to 3.5mm audio interface on GAC2500 via 3.5mm audio aux cable. 4. Hold the screen at the top of the status bar, drag and drop down to open the status bar, tap on line sequence notifications and select the line sequence the same as the one of 3.5mm headset interface on the mobile phone. 5. Answer incoming call or dial out with mobile phone, the sound will be picked up and played via Figure 5 GAC2500 Select line Screen GAC2500.

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Note:

1. The GAC2500 package contains no 3.5mm audio aux cable, you can get it at electronic gadgets store. 2. The line sequence of GAC2500 must be the same as the one of your mobile phone, or the microphone may work improperly. 3. You cannot dial mobile phone number via GAC2500 keypad directly. 4. Once enabled mobile phone mode, please hold the 3.5mm headset line before make the second call. 5. Once a conference is established, the 3.5mm aux device will occupy a party as one party of the conference. 6. Please do not unplug the 3.5mm audio aux cable or it may cause call exception. 7. The audio quality may varies according to different types of 3.5mm audio aux cable and mobile Firmware Version 1.0.1.x GVC2500 User Guide Page 17 of 88 phones. 8. Once the 3.5mm audio aux cable is inserted, some types of mobile phones may be detected by GAC2500 after the call is established.

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Firmware Version 1.0.1.x GVC2500 User Guide Page 18 of 88 GETTING TO KNOW GAC2500 DESKTOP MENU When the GAC2500 is on idle screen, tap on the 5 soft keys at the bottom of the screen to operate. Figure 6 GAC2500 Multi-screens Home Screen. GAC2500 Home screen displays 5 soft keys at the bottom of the screen for users to easily make operations. It is by default and cannot be changed. You can dial up or start a conference on this screen. Widget. GAC2500 supports tools and apps like weather forecast, Clock, MPK, and etc. Status Bar. The GAC2500 status bar is located on the top of the screen to indicate the current status of the device. Please refer to chapter Status Icons for more details. Soft Key. Including Volume+, Volume-, Back, Home, and Process Manager. These 5 soft keys always display at the bottom of the screen. STATUS ICONS Touch the status bar of GAC2500 and slowly drag it down to display the full status list. Users could view status icons that indicate the current status of the device. The following table lists the main status icons used on GAC2500. Table 4 GAC2500 Status Icons Descriptions Icon Descriptions Icon Descriptions Icon Descriptions Ethernet is connected Missed call Calls from blacklist. Trying to connect to the Ethernet One line is in active. Call forward is set up Ethernet is disconnected Unread voicemail. Auto answer is set up Firmware Version 1.0.1.x GVC2500 User Guide Page 19 of 88 DND mode is enabled Bluetooth is connected Bluetooth has been plugged in. Downloading The alarm is enabled 3.5mm headset is inserted. PPPoE is connected Warnings VPN is connected The USB mouse is connected RJ48 CAT5 is connected SD Card is inserted Wi-Fi is connected. Sending Bluetooth files via Using Bluetooth headset for calls. Download failed Alarm with snooze Switch 3.5mm headset lines PPPoE connection is failed New SMS VPN connection is failed The USB keyboard is connected Set GAC2500 as master device SD Card space or USB drive is full. Volume is turned to silent Downloading files via Bluetooth (Dynamic) Mute is enabled. Updating Application. Calendar event Full contacts storage. Powering the device with PoE. Full messages storage More notifications VPN is connected Set GAC2500 as slave device USING THE ONSCREEN KEYBOARD ENGLISH KEYBOARD This is the default keyboard on the GAC2500. The GAC2500 English keyboard supports multiple languages input methods. Users could tap on below. to switch among different languages. See figure Firmware Version 1.0.1.x GVC2500 User Guide Page 20 of 88 Figure 7 GAC2500 Soft Keyboard - English Input Method Tap on to switch CapsLock. Figure 8 GAC2500 English Keyboard-Uppercase CHINESE KEYBOARD GAC2500 supports Google Pinyin Input, go to Settings->Language & Keyboard to configure. Figure 9 GAC2500 Chinese Keyboard-Google Pinyin Method NUMBERS AND SYMBOLS To input number and symbols, tap on on the default keyboard to switch to numbers/symbols. Tap on for more numbers/symbols. Figure 10 GAC2500 Soft Keyboard-Symbols and Numbers Figure 11 GAC2500 Soft Keyboard-More Symbols and Numbers Firmware Version 1.0.1.x GVC2500 User Guide Page 21 of 88 USING THE LED INDICATOR The GGAC2500 LED indicator is located on the top part of the device. It can be used to notify the users with current status of the device. The priority of the indicator from high to low is shown below. Color Table 5 GAC2500 LED Indicator Descriptions LED Indicator Status Fast Flashing Solid Slow Flashing Flashing Solid Fast Flashing Descriptions Incoming call (including calls when conferencing and when phone is busy) Calling, Talking, Conferencing, Screensaver status Call on hold Unhandled events. Including missed call (s), New voicemail (s), New SIP Message (s). High memory usage, maximum message number, full contacts storage, network disconnection Upgrading None OFF Normal Firmware Version 1.0.1.x GVC2500 User Guide Page 22 of 88 ASSISTIVE TOUCH GAC2500 screen supports multi-touch in full screen, users could operate the GAC2500 with touch or drag gestures. USING TOUCHSCREEN Figure 12 GAC2500 Finger Gestures Use your fingers to operate the following gestures on the GAC2500 as shown in figure above:

Tap: Briefly touch surface with fingertip once to initiate the menu, options or applications. Long PressTouch the app for extended period of time for 2 seconds bring up operation options. Flick and SlideTouch surface with one finger and slide over surface down to open the pull-down menu, slide over surface leftright or up to page up or make some operations. Press and Drag: Press the item and move it by dragging the finger up and down, left and right. Zoom In/Zoom Out: Touch surface with two fingers and bring them closer together to zoom out, Touch surface with two fingers and move them apart to zoom in. Double TapRapidly touch surface twice with the fingertip to rearrange the zoomed page to fit the screen when viewing photos or WebPages. SHORTCUT KEYS GAC2500 supports shortcuts for some special operation like Screenshots, Factory Reset, Upgrade and Security. Firmware Version 1.0.1.x GVC2500 User Guide Page 23 of 88 Screenshot: Long press the Applications icon on GAC2500 screen, the screenshot file will be saved automatically in the screenshot folder under sdcard. Go to FileManager->Storage->Pictures-

>Screenshots to view files. Factory Reset: When powering up GAC2500, long press the reset button more than 10 seconds to restore to factory settings. Upgrade: When powering up GAC2500, long press the button for 4 to 9 seconds to update system. Security Mode: When the device displays the second GRANDSTREAM pattern after powered, long press the menu button until the desktop appears to access the security mode. MANAGING STATUS BAR The GAC2500 status bar is located on the top of the screen. Touch the bar and slowly drag it down to display the full status list. Once the status bar is opened, users could view Notifications. Figure 13 GAC2500 Open Status Bar The Notifications in the Status Bar is as shown in figure below. Figure 14 GAC2500 Status Bar-Notification Click on the "Clear All" button on the upper right corner to clear all the notification messages. Slide a notification message to left or right to delete it. Click a notification message to view the details. Tap on the corresponding icon on the top of the screen to quick turn on/off the applications. Firmware Version 1.0.1.x GVC2500 User Guide Page 24 of 88 Drag the seekbar behind the icon Tap on the corresponding icon on the top of the screen to quick access the applications. to adjust LCD brightness. DESKTOP MENU When the GAC2500 is running on idle screen, long press the blank area, then tap on "Edit Desktop" or

"Set Wallpaper".See figure below. Figure 15 GAC2500 Idle Screen Menu Edit Wallpaper: Edit the idle screen wallpaper. Edit Desktop: Add, delete and edit desktop or add widgets on the desktop. EDITING WALLPAPER You can set wallpapers, live wallpapers or choose photo from gallery. See figure below. Firmware Version 1.0.1.x GVC2500 User Guide Page 25 of 88 Figure 16 GAC2500 Choose Wallpaper 1. Long press the blank area on home screen then tap on "Set Wallpaper";

2. Slide wallpapers to left or right to view a list of sample wallpapers embedded in the GAC2500, tap on wallpaper to preview,Tap on "Set Wallpaper" to confirm the selection. You can also select photo from gallery or file manager, or set live wallpapers. EDIT DESKTOP Add Desktop: Press finger slightly in free space of the screen and fast slide to the last screen and click on the middle screen to add a new desktop. Users could add up to 8 desktops. Delete Desktop: Click on the upper right corner of the blank desktop to delete it. The desktop with widgets and shortcuts on it is undeletable. ADDING AN ITEM TO DESKTOP Users could add commonly-used items (Weather Forecast, RSS News, etc.) to the desktop. Follow the steps below:

1. When the GAC2500 is running on idle screen, long press the blank area, then tap on "Edit Desktop";

2. Slide left or right to view a list of options as shown in figure 18. 3. Tap and press the shortcut or widget you would like to add and drag it to the desktop you want to put on. Firmware Version 1.0.1.x GVC2500 User Guide Page 26 of 88

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Note:

1. Please ensure that there is enough space in the desktop when adding widget. 2. Users may need to select the specific items before add them to the desktop. i.e., browser, bookmark, star-labeled contact, photos, etc.

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MANAGING DESKTOP APPS AND ITEMS All the GAC2500 apps/items can be accessed /removed. Some apps support size editing. Take Weather Forecast as an example in the following chapter. OPENING AN APP Tap on Weather Forecast icon to access screen as shown in figure 19. Users could edit Weather Forecast after accessing it. Figure 17 GAC2500 Weather Forecast Screen MOVING AN APP Touch and hold the Weather Forecast icon, when the icon begins to float, drag it to any desktop with free space. Firmware Version 1.0.1.x GVC2500 User Guide Page 27 of 88 Figure 18 GAC2500 Move Weather Forecast to Desktop REMOVING AN APP Touch and hold the Weather Forecast icon when the Recycle Bin icon displayed on the bottom as shown in figure 21, drag the widget to the Recycle Bin, when the item gets close to the Recycle Bin, it will turn red. Now lift your finger to release. Firmware Version 1.0.1.x GVC2500 User Guide Page 28 of 88

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Figure 19 GAC2500 Remove Weather Forecast from Desktop Note:

The Applications cannot be deleted.

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MANAFERING APPLICATIONS Tap on the Applications icon GAC2500 as shown below. on screen to view the running applications installed on the Firmware Version 1.0.1.x GVC2500 User Guide Page 29 of 88 Figure 20 GAC2500 Managing Applications Slide up/down to view the applications, select one application and slide left/right to turn it off , or tap on it to access the corresponding interface. Tap on to remove all running applications. HOME SCREEN GAC2500 has only one default home screen, Tap on the icon on the middle bottom of the screen to go back to home screen anytime. Firmware Version 1.0.1.x GVC2500 User Guide Page 30 of 88 Figure 21 GAC2500 Home Screen Mode. Set the call mode. Account. Display all registered accounts. Tap to select account. Textbox. Tap on digits below to input phone number, or tap on the textbox to bring out the soft keyboard. Youll see all the matching numbers on the left when you inputting digits, tap on the number to add it to textbox directly, you can add up to 6 numbers. Dial-up. Tap to dial out. Conference. Display the conference line. Tap to access conference interface. Contacts. Tap to access Contacts interface to add more contacts to the textbox. Conference Schedule. Display the latest 2 scheduled conferences. Tao on "Start" to start conference at once. You can slide left or right to view applications and widgets on other desktops, or dial out or start conference on home screen. Firmware Version 1.0.1.x GVC2500 User Guide Page 31 of 88 CONNECTING TO NETWORK AND DEVICES The GAC2500 supports a variety of network connections (Ethernet, Wi-Fi) and device connections, you can configure on GAC2500 or log in the GAC2500 web UI to configure. For more information about using web UI, please refer to the GAC2500 Administration Guide in www.grandstream.com. NETWORK Network connection has a variety of ways, one is wired connection via the cables, and the other way is to connect via Wi-Fi. ETHERNET If the user would like to use Ethernet connection for network access, please plug the Ethernet cable to the LAN port on the back of the GAC2500. Ethernet connection is turned on as DHCP by default. To configure Ethernet settings on GAC2500:

1. Plug the Ethernet cable into the LAN port on the back of the GAC2500. 2. Go to LCD menu->Settings->Network->Ethernet->IPv4 Settings. 3. Tap on "Address Type" to select DHCP, Static IP or PPPoE as the address type. For DHCP, save the setting and the GAC2500 should be able to get IP address from the DHCP server in the network. For static IP, enter IP Address, Subnet Mask, Default Gateway, DNS Server and Alternative DNS server for the GAC2500 to correctly connect to the network. For PPPoE, enter PPPoE account ID and password so the GAC2500 can get IP address from the PPPoE server. WI-FI Wi-Fi is supported and built-in on the GAC2500. On the LCD display, go to Settings->Network-> Wi-Fi to turn on and configure Wi-Fi. Firmware Version 1.0.1.x GVC2500 User Guide Page 32 of 88 Figure 22 GAC2500 Add Wi-Fi Screen TURNING WI-FI ON OR OFF Once Wi-Fi is turned on, GAC2500 will automatically start the scanning within the range. A list of Wi-Fi networks will be displayed as scanning result. Tap on the SSID and enter the correct password information to connect to the selected Wi-Fi network. Follow the steps below for static IP usage in Wi-Fi environment:

1. Tap on one Wi-Fi network in the scanned Wi-Fi list to bring up the dialog that shows signal strength, security, password and option "Show advanced options". 2. Select "Show advanced options". The dialog will show additional option "IP settings". 3. In "IP settings", select Static IP, enter IP Address, Subnet Mask, and Default Gateway for the GAC2500 to correctly connect to the network. BLUETOOTH Users could use the Bluetooth to send or receive files to cellphone, or use Bluetooth speaker and etc. TURNING BLUETOOTH ON OR OFF There are two ways to enable Bluetooth:

On the LCD display device, go to Settings->Network->Bluetooth. Click to enable the Bluetooth in the drop-down status bar. Firmware Version 1.0.1.x GVC2500 User Guide Page 33 of 88 PAIRING GAC2500 WITH A BLUETOOTH DEVICE Before connecting GAC2500 with other Bluetooth device, users must pair them first. They will stay paired afterwards unless they are manually unpaired. To pair Bluetooth device:

1. On the LCD display device, go to Settings->Network->Bluetooth. 2. Press button on the remote control and select "Search for devices". 3. The GAC2500 scans and displays the IDs of all available Bluetooth devices in range. Once the Bluetooth device shows up in the result, tap on it to start pairing. 4. Confirm the passkey in the prompted message (if any). Or if passcode is required, please refer to the device's documentation or other procedures to obtain the passcode. CONNECTING TO A BLUETOOTH DEVICE After successfully paired, the device will be connected to the GAC2500 immediately. Users will see this device listed under "Paired Devices". Tap on

"Rename", "Unpair" and etc. next to the connected device. Users will see options If the connection is lost between the Bluetooth device and GAC2500, go to LCD menu->Settings-

>Network->Bluetooth and click on the device name under Paired devices again to reconnect. Figure 23 GAC2500 Bluetooth - Paired Device Firmware Version 1.0.1.x GVC2500 User Guide Page 34 of 88 SENDING FILES VIA BLUETOOTH Users could transfer files, share contacts information with other Bluetooth portable devices after pairing and connection.A prompt for file transferring will be displayed on GAC2500 LCD display device when the GAC2500 receives the file transferring request. Accept the request to receive file and the file will be stored under SD Card/Bluetooth directory. VPN SETTINGS Users can add VPN using different protocols. Follow the steps below to set up VPN. 1. Access GAC2500 home screen, go to Applications ->Settings ->Network->VPN;

2. Tap on "Add VPN file" to access configuration page as shown below;

Figure 24 GAC2500 Add VPN Files Screen 3. Fill in parameters and save, go back to VPN page, you will find the new VPN file you just added;

4. Tap on the VPN file to open the validation page as shown below;

5. Fill in correct username and password to connect to VPN. Figure 25 GAC2500 VPN Validation Screen If the GAC2500 is connected to VPN successfully, icon will be shown in the top status bar; if the connection is failed, a prompt box will pop up to remind users whether to connect again. If icon displays in the top status bar, please check whether your VPN configuration is correct. Table 6 GAC2500 VPN File Parameters Firmware Version 1.0.1.x GVC2500 User Guide Page 35 of 88 Parameters Descriptions Name Type Server Address PPP Encryption

(MPPE) Show Advanced Options DNS Search Domains Fill in your company address or the server you are connecting to. Set to PPTP, L2TP/IPSec PSK, L2TP/IPSec RSA, IPSec Xauth PSK, IPSeXauth RSA or IPSec Hybrid RSA. Fill in the server URL or IP address. Define whether to use PPP encryption. Check to display more options below. Define search domain. DNS Server Input DNS server address. Forwarding Routes Input Forwarding Routes. For example, 10.0.0.0/8. VLAN SETTINGS Access GAC2500 home screen, go to Applications->Settings->Network->VLAN to configure VLAN settings on the GAC2500. Table 7 GAC2500 VLAN Configuration Parameters Parameters Descriptions Assigns the VLAN Tag of the Layer 2 QoS packets for LAN port. The default value is 0. Note:

Please do not change the setting before understanding the VLAN's settings or consulting the network administrator. Otherwise, the device might not be able to get the correct IP address. Assigns the priority value of the Layer 2 QoS packets. The default value is 0. Layer 2 QoS 802.1q/VLAN Tag Layer 2 QoS 802.1p Priority LLDP SETTINGS Access GAC2500 home screen, go to Applications ->Settings ->Network->LLDP to configure LLDP settings on the GAC2500. Table 8 GAC2500 LLDP Configuration Parameters Parameters Descriptions LLDP Enable or disable LLDP. The default setting is disabled. Firmware Version 1.0.1.x GVC2500 User Guide Page 36 of 88 Layer 3 QoS for SIP This field defines the layer 3 QoS parameter for SIP packets. It is the value used for IP Precedence, Diff-Serv or MPLS. The Default value is 48. Layer 3 QoS for Audio This field defines the layer 3 QoS parameter for audio packets. It is the value used for IP Precedence, Diff-Serv or MPLS. The Default value is 48. Layer 3 QoS for Video This field defines the layer 3 QoS parameter for video packets. It is the value used for IP Precedence, Diff-Serv or MPLS. The Default value is 48;

802.1X MODE Access GAC2500 home screen, go to Applications ->Settings ->Network->802.1X Mode. By default 802.1X is disabled. Selecting 802.1X mode to "EAP-MD5", "EAP-TLS5" or "EAP-PEAP" to turn on 802.1X. Once enabled, the user will be required to enter the identity and Password to be authenticated in the network. Table 9 GAC2500 802.1X Mode Parameters Parameters Descriptions 802.1x Mode Allows the user to enable/disable 802.1X and configure 802.1X mode. The default setting is disabled. Identity Enter the Identity information for the 802.1X mode. MD5 Password Enter the MD5 Password for the 802.1X mode. CA Certificate Upload the CA certificate for the 802.1X mode. Client Certificate Upload the CA certificate for the 802.1X mode. Private Key Upload the private key for the 802.1X mode. Firmware Version 1.0.1.x GVC2500 User Guide Page 37 of 88 MAKING PHONE CALLS ACCOUNT Users could make single line calls on GAC2500, you can switch lines, or hold, mute and transfer your call, etc. GAC2500 home screen is the dial screen or you can tap on on desktop to access dial screen. The following figure shows the account is successfully registered (account icon is highlighted in green). Figure 26 GAC2500 Registered Account Status MAKING A CALL DIRECT DIALING 1. Enter the call screen;

2. Enter the necessary digits on the keypad;

3. Tap on

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to dial out. Note:

1. GAC2500 allows users to configure the "#" key as the "Send" key. If users need to cancel this setting, please log in the built-in Web page to set the parameter "use # as the dial key" to "No". 2. Enter digits in the dial-up box. If the digits or the letters for the digit matches contacts and call history, a dropdown list of numbers will be displayed. For example, entering 5 (JKL), 6 (MNO), 4 (GHI) and 6

(MNO) will display 5646 or john if contact "john" exists. Users can then select it to dial out.

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REDIAL Redial is to dial the last dialed-out number. It is only available when the call log exists. Firmware Version 1.0.1.x GVC2500 User Guide Page 38 of 88 1. Enter the call Interface;

2. Press the button or tap on "#" to dial the last dialed-out number automatically. DIALING A NUMBER VIA CONTACT Follow the steps below to dial a number via Contacts. 1. On the LCD display device, access Contacts by tapping on 2. Navigate and select in the Contacts entries using the remote control navigation keys. on home screen. 3. Tap on the dial key to dial out. DIALING A NUMBER VIA CALL HISTORY 1. On the LCD display device, access Applications on home screen and access call history by selecting icon

. 2. The LCD will display all call history types. Navigate in the call history list by selecting the call history category. Select the call history entry you would like to dial out. 3. Press to dial out. DIRECT IP CALL Direct IP Call allows GAC2500 and another VoIP device to talk to each other in an ad-hoc fashion without a SIP proxy. VoIP calls can be made between these two if:

Both GAC2500 and VoIP phone have public IP addresses Or Both GAC2500 and VoIP phone are on the same LAN / VPN using private or public IP addresses Or NAT is disabled or GAC2500 NAT is disabled. Both devices can be connected through a router using public or private IP addresses (with necessary port forwarding or DMZ). To make a direct IP call, please follow the steps below:

1. Access the dial screen on GAC2500. 2. Set the mode to "IP Call". 3. Input the target IP address. For example, if the target IP address is 192.168.124.123 and the port is 5062, input the following:

192*168*124*123#5062 The * key represents the dot (.) and the # key represents the colon (:). Firmware Version 1.0.1.x GVC2500 User Guide Page 39 of 88 4. Press to dial out. PAGING/INTERCOM Before placing paging/intercom, please make sure the callee has paging/intercom enabled so it can automatically answer the paging/intercom call. To make paging/intercom call:

1. Access the dial screen on GAC2500. 2. Set the mode to "Paging". 3. Enter the number to dial. 4. Press to dial out. ANSWERING A CALL When the device is in idle and there is an incoming call, the device will show the call screen as below. Figure 27 GAC2500 Single Incoming Call Screen Select "Answer" to answer the call, or refuse the call by pressing the button "End" to reject the call. When there is an incoming call during an active call, users will hear a call waiting tone with the LCD displaying the caller name and ID for the incoming call. Firmware Version 1.0.1.x GVC2500 User Guide Page 40 of 88 Figure 28 GAC2500 New Incoming Call Screen Users could select "Answer" to answer with audio only, , or refuse the call by pressing the button "End" to reject the call. CALL MANAGEMENT During an active call, you can make other operations like hold/hold, mute/unmute, call recording, add a new call, start conference, or end the call. Call Lines. Display the current line status: active, hold, incoming, outgoing. Conference. Tap to add all active lines to conference members. Hold/Unhold. Tap to hold/hold the call. Mute/Unmute. Tap to mute/unmute the call. Keyboard. Tap to bring up the soft keyboard to input DTMF. More. Bring up more options including like Transfer, Recording, etc. End. End the current line. CALL HOLD AND CALL RESUME CALL HOLD During the active call, press HOLD button to put the current call on hold. Users could then make or answer a new call. It shows as follows:

Firmware Version 1.0.1.x GVC2500 User Guide Page 41 of 88 Figure 29 GAC2500 Single Incoming Call Screen RESUME TO CALL If the active call is on hold, users could press the "Unhold" button to resume call or tap on the "End"

button to hang up the call. Firmware Version 1.0.1.x GVC2500 User Guide Page 42 of 88 Figure 30 GAC2500 Call On Hold Screen CALL RECORD Users could save the call conversations to the GAC2500 by recording during an active call. You can listen to the recordings from Recorder, please refer to the chapter Recorder for details. 1. During an active call, tap on the Record icon in the upper right corner to start recording as shown in the figure 37 below:

Firmware Version 1.0.1.x GVC2500 User Guide Page 43 of 88 2. Tap on the icon again to stop recording. Figure 31 GAC2500 More-Start Recording CALL TRANSFER Call transfer is to transfer one call to another call. Call transfer including blind transfer and attended transfer according to different situations. For example, if user A wants to transfer the call with user B to user C, blind transfer or attended transfer is optional. BLIND TRANSFER 1. User A and user B are in an active call. 2. User A tap on Transfer button to bring up the transfer screen. Firmware Version 1.0.1.x GVC2500 User Guide Page 44 of 88

Figure 32 GAC2500 Transfer-Blind Transfer 3. Set the transfer mode to Blind .The default mode is Blind. 4. Enter the digits and press the SEND to transfer the call with user B to User C. When user Cs phone rings, the phone interface of user A is shown in figure 43. If user C answers the call, user A will automatically go back to the idle screen, which indicates the successful transfer. 5. User Cs phone will ring, the phone with CID function will display user Bs number on screen as the caller.

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Note:

1. If inputted the wrong digits, press the button button to empty all digits. to delete the digit one by one, or long press the 2. Users could tap on Back icon to go back to the active call interface if wants to cancel transfer.

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ATTENDED TRANSFER There are two ways of attended transfer: Call Forward and Call Transfer. Firmware Version 1.0.1.x GVC2500 User Guide Page 45 of 88 CALL TRANSFER 1. User A and user B are in an active call. 2. User A presses the button to add a new line with user C. The call with user B will be automatically put on hold. 3. User C answers the phone to set up the line with user A 4. User A taps on More button in the menu then choose Transfer to bring up the transfer screen. The line with user B will be displayed on screen. 5. User A sets the transfer mode to Attended then choose to display user Bs number, the call will be transferred to user C. User B and user C could talk directly via the phone. Figure 33 GAC2500 Transfer-Attended Transfer CALL FORWARD 1. User A and user B are in an active call. User A tap on More button in the menu to choose Transfer to bring up the transfer screen. 2. Select the Transfer mode. As shown in figure 45. Firmware Version 1.0.1.x GVC2500 User Guide Page 46 of 88 Figure 34 GAC2500 Call Forward-Select Forward Mode Input digits and then press the Send soft key. 3. 4. Users will hear the ringback tone and see the prompt as shown in figure 46. Hang up the phone to transfer the call to the third party C automatically; press the "Cancel" button will cancel the transfer. Firmware Version 1.0.1.x GVC2500 User Guide Page 47 of 88 Figure 35 GAC2500 Call Forward-Transferring 5. User A could press the "Transfer" button to forward the call to user C. Click on "Split" button to establish line with the third patty, while user B will be put on hold. Figure 36 GAC2500 Call Forward-Split DND (DO NOT DISTURB) When DND is on, the incoming calls to the GAC2500 will be blocked without ringing. Users could see the blocked calls in call history. Once enabled, the DND icon on the top of the screen. 1. Hold the screen at the top of the status bar, drag and drop down to open the status bar. will be displayed in the status bar 2. Touch the DND icon

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to turn it on/off. Note:

1. When DND is on, the active call will not be affected, all the calls after to the registered accounts will Firmware Version 1.0.1.x GVC2500 User Guide Page 48 of 88 be blocked. 2. When DND is on, the incoming calls to the GAC2500 will not be saved in the call history but in the blacklist.

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MISSED CALL When there is a missed call, the missed call reminder icon call icon will be shown on the status bar and the notification bar will show the missed call. Tap on the notification to access the dial screen, or access the Call History interface to view the missed calls, the reminder icon will disappear. CALL FORWARD Call forward (Unconditional/No-answer/Busy/Time-based) can be set up on device or from web GUI. Log in GAC2500 web GUI and go to Settings page->Account->Call Settings. For details, please refer to

"GAC2500 Administration Guide". SET ON LCD 1. Go to Settings->Personalized Account to select the account and access configuration page;

2. Tap on Call Forward Type to access and specify the forward type:

Unconditional: Forward all calls to particular number Time based: Forward calls based on the time range. Busy: Forward calls when exists an active call. No-answer: Forward calls when phone is not answered. SET FROM WEB GUI Log in the Web GUI and go to Account->Call Settings to find Call Forward option as shown below and specifies the call forward mode in the drop-down list. Figure 37 GAC2500 Call Forward Mode On Web GUI 7-WAY CONFERENCE The GAC2500 supports up to 7-way conference. The GAC2500 can be the host to initiate a conference or join other conferences as a party. INITIATING CONFERENCE The conference can be initiated from call screen, or start conference from schedule. Firmware Version 1.0.1.x GVC2500 User Guide Page 49 of 88 The following steps introduces the way to start conference from call screen,refer to chapter Schedule for more details about initiating conference from schedule. Enter numbers in the text box or select parties from the list below. 1. Access dial screen when the phone is on idle;

2. Set call mode and select account;

3. Enter digits in the textbox;

4. Tap on the matching number on the left to add it to the textbox;

Figure 38 GAC2500 Manually Add Numbers To Conference 5. Repeat the steps 3-4 to add more numbers;

6. Tap on to dial out. Press 1. Access dial screen when the phone is on idle;

to access conference page, then tap on to add parties. 2. Tap on Conf button or the icon on desktop to access conference page;

3. Tap on to start adding party to conference. Firmware Version 1.0.1.x GVC2500 User Guide Page 50 of 88 Figure 39 GAC2500 Add Party To Conference 4. Enter digits and then tap on 5. Repeat the steps 3-4 to add more parties;

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to dial out. Note:

1. You can add multiple members to conference at one time. 2. You cannot stay in one single active line once joined conference.

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ANSWERING AN INCOMING CALL IN CONFERENCE You can specify how your GAC2500 handles incoming calls. Depending on your configuration, your GAC2500 automatically answers a call or prompts you to answer a call manually:

Log in GAC2500 web GUI and go to Settings page->Account->Call Settings and set "Auto-answer" option to "Yes". All incoming calls will be automatically answered. Once enabled, you can see the icon displayed on the status bar. Firmware Version 1.0.1.x GVC2500 User Guide Page 51 of 88 CONFERENCE MANAGEMENT The following figure shows a 3-way conference established. Figure 40 GAC2500 3-Way Conference Redial. Tap on the icon to dial out again if the call failed. Mute. Once enabled, the icon next to the conference member will turn to

, tap on again to restore. The selected member will not be heard by other parties. Block.Once enabled, the icon next to the conference member will turn to

, tap on again to restore. The selected member will not hear other members. Details. Tap to view conference details. Delete. Tap to delete conference parties. More. Bring up more options including Open DTMF, Mute All, Block All.etc. MPK. Tap to access MPK interface. Keypad. Tap to pen DTMF keyboard. Firmware Version 1.0.1.x GVC2500 User Guide Page 52 of 88 Start/Stop Recording. Tap to start/stop recording. The recording file will be saved automatically. Mute/Unmute All. Tap to mute/unmute all parties except the host. Block/Unblock All. Tap to block/unblock all parties except the host. Hold. Hold/Unhold conference. Lock. Lock/Unlock conference. End. End conference and go back to home screen. INVITE MEMBERS TO CONFERENCE Users could use one of the following ways to add members. Access the dial screen by clicking on the ADD icon on conference screen. Then enter the number to dial out. Once the member answers the call, it will be connected into the conference automatically. Tap on to access the call screen, then enter the number to dial out. Once the member answers the call, it will be connected into the conference automatically. The member calls the conference number. If the host answers the call, the member will join conference automatically. REMOVING MEMBER FROM CONFERENCE To remove a member from the conference, tap on the member icon and click to delete it. THIRD PARTY APPLICATIONS The GAC2500 runs the Android Operating System and therefore offers full access to the hundreds of thousands of Android apps in the Google Play Store, including Skype for Business, Google Hangouts and etc. For example, to use third party app Skype for Business during the conference:

1. On conference screen, click on MORE button and select "Third party applications". 1. 2. Establish a conference call on the GAC2500. 3. Search contacts in Skype for Business and dial out. 4. The new call will be added to conference. Install Skype for Business and sign in. END CONFERENCE To end the conference, tap on END button to disconnect. If the GAC2500 is the conference host, ending the conference will disconnect all the members from the conference. If the conference member hangs up the call, it will be disconnected from the conference but other parties in the conference will stay in the conference. Firmware Version 1.0.1.x GVC2500 User Guide Page 53 of 88 SCHEDULE SCHEDULE feature allows the user to set a specific time to hold a conference in advance, with conference reminder and members. The schedule page is shown below, including upcoming conferences and conference that has been held:

Figure 41 GAC2500 Schedule Screen VIEW CONFERENCE DETAILS Users could view scheduled conference details after the current time. Select one conference and tap to view conference details. Press to exit. Firmware Version 1.0.1.x GVC2500 User Guide Page 54 of 88 Figure 42 GAC2500 Conference Details Screen ADD SCHEDULED CONFERENCE Follow the steps below to add a scheduled conference:

1. Tap on on desktop to access schedule screen. 2. Tap on in the upper right corner to access "Add Conference" screen as below. 1. Fill in conference name, members, start time, conference duration, etc. Figure 43 GAC2500 Add Conference Screen 2. Tap on to save the scheduled conference and go back to schedule screen. Table 11 GAC2500 Add Conference Parameters Parameters Conference Name Set the conference name to identify this conference. Descriptions Members of Conference Click on button to access the Add Member screen. You can add one member or a group of members. Tap on back to Add Conference screen. Up to 6 members can be added. in the upper right corner to save and go Conference Date Configure when the conference starts. Firmware Version 1.0.1.x GVC2500 User Guide Page 55 of 88 Duration (Min) Configure conference duration. Reminder Time Configure whether to remind users in advance. A prompt dialog box will pop up on the GAC2500 screen 10 minutes before the conference starts. Auto Answer For Conference Memb er Configure whether to answer the call from the conference member automatically. If the call is not from the conference member, it will not be answered automatically. Lock Users could lock/unlock the scheduled conference. Once locked, the other incoming calls will not be able to join conference. EDIT SCHEDULED CONFERENCE Follow the steps below to edit scheduled conference:

1. Access conference schedule screen and select the conference entry you would like to edit. 2. Tap on in the upper right corner to access edit screen. 3. Tap on in the upper right corner to save changes and go back to schedule screen. RESCHEDULE CONFERENCE If you want to reschedule the conference that has been held, please refer to chapter Edit Schedule Conference to edit conference again and save. DELETE SCHEDULED CONFERENCE Follow the steps below to delete the existing scheduled conference:

1. Access schedule screen and select the conference entry you would like to delete. 2. Slide left on screen and tap on to delete conference. Firmware Version 1.0.1.x GVC2500 User Guide Page 56 of 88 Figure 44 GAC2500 Delete Conference Screen You can also follow the steps below to batch delete conferences. 1. Access schedule screen and long press the conference entry you would like to delete, the screen is as shown below;

Figure 45 GAC2500 Edit Conferences Screen Firmware Version 1.0.1.x GVC2500 User Guide Page 57 of 88 2. Check the conferences you want to delete;

3. Tap on in the upper right corner to batch delete conferences. VOICEMAIL will show up as a notification in the status bar. Users When there is a new voicemail, voice mail icon could go to Settings->Advanced Settings->Account, or login the web UI->Settings->Account->General Settings ->Voice Mail UserID to configure the access number for the voicemail. Follow the steps below to access voicemail:

1. Access the dial screen and input voicemail access number. 2. Tap on on the call screen to dial into the voicemail box. 3. Follow the Interactive Voice Response (IVR) for the message retrieval process. Users could also tap on go will be shown on the voice mail app icon as well. See figure below. to access the voicemail box. The number of new voicemail messages Figure 46 GAC2500 Voice Mail Application Firmware Version 1.0.1.x GVC2500 User Guide Page 58 of 88 APPLICATIONS GAC2500 provides built-in applications such as like Contacts, Call History, FileManager, Browser and etc. Users could also download the apps from GS market or Google Play to install on the GAC2500. CONTACTS GAC2500 Contacts app helps users to easily store and manage phone number and contact information. Users can add contacts on the GAC2500 or import contacts from external devices as well as download from a server. On the GAC2500 home screen, you can see local Contacts, LDAP Contacts and BS Contacts. Figure 28 GAC2500 Contacts Screen LOCAL CONTACTS The Local Contacts screen shows as follows:

Figure 47 GAC2500 Local Contacts Screnn Contacts. Display all contacts. Groups. View groups. Select one group to view group details. Blacklist. Display blacklist. Call.Tap Add Contact. Tap to access New Contact screen. Fill in contact information and save. on the contact you would like to call. Firmware Version 1.0.1.x GVC2500 User Guide Page 59 of 88 Search Contact. Tap to access Search Contact screen. More. Tap on Contact Details. Select one contact to view contact details. to export/import/download Contacts, view storage status or sort Contacts. ADD CONTACT ADD SINGLE CONTACT Follow the steps below to add one single contact. 1. On the Contacts screen, tap on the button to access New Contact screen;

2. Enter contact information. Choose the account on the left of the Phone field to dial out this number;

3. Click "OK" to save the contact information. Figure 48 GAC2500 Add New Contact Screen BATCH IMPORT CONTACTS Import function allows users to batch import contacts. The phonebook with compatible format needs to be saved to the storage devices like SD card/USB flash drive and plugged into the GAC2500. 1. On the Contacts screen, tap on the MENU key on Contacts screen and select "Import" to access Import Contacts screen;

Firmware Version 1.0.1.x GVC2500 User Guide Page 60 of 88 Figure 49 GAC2500 Import Contacts Screen 2. Configure parameters and select the path to save the imported file;

3. Click "OK" to save the contact information. Figure 50 GAC2500 Import Contacts Parameters Firmware Version 1.0.1.x GVC2500 User Guide Page 61 of 88 Parameters Descriptions Clear The Old List If enabled, the previous contact records will be deleted when a new phonebook file is loaded into the phone. If disabled, both the old contacts and new contacts will be kept in the GAC2500. Replace Duplicate Entries If enabled, when the phonebook file is imported to the phone, the duplicated entries will be removed. If disabled, both the old contacts and new contacts will be kept in the GAC2500. File Encoding Select the encoding format for XML contact file. File Type Select the file format for phonebook file import. The device supports xml, csv and vcard format. Select The File Select file from storage device plugged into the GAC2500. CGAC2500 supports downloading phonebook from the file server to batch add contacts. The default file name the GAC2500 looks for is "phonebook.xml". The phonebook XML file should be placed under the file server directory for the GAC2500 to retrieve. The GAC2500 supports vcard/xml/csv file format. 1. On the Contacts screen, tap on the MENU key and select "Download" to bring up the Download Contacts screen. Figure 51 GAC2500 Download Contacts Screen Firmware Version 1.0.1.x GVC2500 User Guide Page 62 of 88 2. Configure parameters and select the path to save the file. 3. Tap on the "OK" key to save the contact information. Table 10 GAC2500 Download Contacts Parameters Parameters Descriptions Clear The Old List If enabled, the previous contact records will be deleted when a new phonebook file is loaded into the phone. If disabled, both the old contacts and new contacts will be kept in the GAC2500. Replace Duplicate Entries If enabled, when the phonebook file is imported to the GAC2500, the duplicated entries will be removed. If disabled, both the old contacts and new contacts will be kept in the GAC2500. Download Mode Select the phonebook download mode from TFTP, HTTP or HTTPS. File Encoding Select the encoding format for the XML contact file. Time Intervals Configure the time interval to download XML contact file. Download Server Fill in the server URL or IP address to download the XML contact file to the device. SEARCH CONTACTS GAC2500 supports Search function; users could tap on icon on the Contacts page and input the keyword to search in the pop-up dialog. GAC2500 will automatically display contacts items related to the search info. Fuzzy search and precise search are both supportive. MANAGE CONTACTS DELETE CONTACT 1. Long press the contact you would like to delete to access edit interface;

2. Check the contact, or click the button in the upper left corner of the toolbar for quick operation.

"Select All" indicates check all select entries while "Cancel All" indicates uncheck all selected entries. 3. Tap on to delete contacts you selected. EXPORT CONTACTS The GAC2500 supports exporting phonebook as vcard/xml/csv files and save the files to other external storage devices. 1. Press the MENU key on Contacts screen to bring up the Export Contacts screen. Firmware Version 1.0.1.x GVC2500 User Guide Page 63 of 88 Figure 52 GAC2500 Export Contacts Screen 2. Configure parameters as shown in table below and select the directory to save the exported file. 3. Tap on the "OK" key to export the file. Table 11 GAC2500 Export Contacts Parameters Parameters Descriptions File Encoding Select the encoding format for XML contact file. File Type Select the file format for phonebook file export. The device supports xml, csv ,vcard. Choose Directory Select directory to save file. SEND CONTACTS 1. Long press the contact you would like to send to access edit screen;

2. Check to select the contact you want to send;

3. Choose the way to send contact. If Bluetooth Device Chooser has been enabled, users could send the contact to the paired user via the Bluetooth. CONTACTS STORAGE STATUS Tap on the Contacts page to view the contacts storage. The GAC2500 can store up to 2000 entries. Firmware Version 1.0.1.x GVC2500 User Guide Page 64 of 88

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Figure 53 GAC2500 Contacts Status Screen Note:

The contacts synchronize with account do not occupy the storage space.

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ADD GOOGLE ACCOUNT Account allows users to add vast number of 3rd party Android applications (including Google, Lync, Skype, company, Email, and etc).Users can also sync GAC2500 via Google Play account, corporate account or Email. Figure 54 GAC2500 Account-Sync Interface Tap "Add Account" button to add new account according to the installation wizard. The following steps demonstrate how to add a Google account. Firmware Version 1.0.1.x GVC2500 User Guide Page 65 of 88 Figure 55 GAC2500 Add Google Account-Wizard 1 Figure 56 GAC2500 Add Google Account-Wizard 2 Firmware Version 1.0.1.x GVC2500 User Guide Page 66 of 88 GROUPS Users could divide contacts into different groups with specific names. Tap on one group entry to view group details. Figure 57 GAC2500 Groups Screen ADD NEW GROUP There are 2 ways to add group members. Add the contact to the group when editing or adding a new contact. Select the contact you would to add to this group on Groups page when adding or editing a new group. Follow the steps below to add new group:

1. Tap on on the Groups page as shown below;

Input the group info and click "OK" to save group. 2.

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Figure 58 GAC2500 Add Group Screen Note:

The priority of ring from high to low is "Custom", "Group", "Account" and "Default". If one group has set the custom ring for its contacts, the phone will ring the custom ringtone other than other group ringtones. Firmware Version 1.0.1.x GVC2500 User Guide Page 67 of 88

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CALL GROUPS 1. Tap on in the upper right corner on Groups screen to access screen as shown below:

Figure 59 GAC2500 Dial Group Members Screen 2. Check group members you want to call;

3. Tap on the DIAL button to dial out. DELETE GROUP Follow the steps below to delete groups. 1. Long press the group you want to delete, the screen is shown below:

2. Check to select the group you would like to delete. Figure 60 GAC2500 Edit Groups Screen 3. Tap on in the upper right corner to delete. BLACKLIST Blacklist helps users to block calls from blacklist at the same time does not affect normally answering other incoming calls. Firmware Version 1.0.1.x GVC2500 User Guide Page 68 of 88 Figure 61 GAC2500 Blacklist Screen

: Display blocks history.

: Tap to add number to blacklist. There are 3 ways to add number: Manually add, Add from Contacts, Add from Call History. Select one way and tap on "OK" to add the corresponding number to blacklist. Long press one blacklist log to enter the editing mode to edit or delete the selected contacts. Users could edit the contact If select one blacklist entry only.

: Blacklist Settings. Parameters Specification Table 12 GAC2500 Blacklist Settings Parameters DND Mode Block Mode Block Options Turn on/off DND mode. Once its turned on, the phone would reject all incoming calls. Turn on/off Block Mode. Once it's turned on, the incoming calls from the numbers in the blacklist will be rejected. Set the types of incoming calls. This option is valid once the Block Mode is turned on. Firmware Version 1.0.1.x GVC2500 User Guide Page 69 of 88 Block Notification Set up whether to notify user after blocked calls. Once it's turned on, the block icon will be displayed in the status bar after the device blocked calls. Users could go to the notification bar to view details. Set up the block schedule. Time Settings LDAP GAC2500 supports LDAP. Tap on LDAP Contacts to access the main interface as shown below:

Figure 62 GAC2500 LDAP Book Screen Tap on in the upper right corner or login the Web page to configure it. (Maintenance ->LDAP Book). Firmware Version 1.0.1.x GVC2500 User Guide Page 70 of 88 Figure 63 GAC2500 LDAP Settings Table 13 GAC2500 LDAP Book Parameters Parameters Descriptions Server Address Port Base DN User Name Password LDAP Name Attributes LDAP Number Attributes LDAP Mail Attributes LDAP Name Filter Firmware Version 1.0.1.x It allows users LDAP server address, users could input IP address or domain name. Set up the port number of LDAP server. Set up the base DN to inquire on the serve ,namely under which directory to inquire contacts.i.e., dc=grandstream, dc=com ou=Boston, dc=grandstream, dc=com Set up the username to login LDAP server. Some LDAP servers support anonymous login without username. Set up the password to login LDAP server. If the LDAP server support anonymous, users could login without password. Set up the name attribute of each record returned from LDAP search. to configure multiple name attribute separated by spaces. i.e., gn cn sn description Set up the number attribute of each record returned from LDAP search. It allows users to configure multiple number attribute separated by spaces. i.e., telephoneNumber telephoneNumber Mobile Set up the mail attribute of each record returned from LDAP search. It allows users to configure multiple mail attribute separated by spaces. i.e., mail mail mailbox Set up the filter when configure name inquiry.i.e., GVC2500 User Guide Page 71 of 88

(|(telephoneNumber=%)(Mobile=%) return all telephoneNumber or contacts with specified filter value in Mobile f.

(&(telephoneNumber=%) (cn=*)) return all contacts with specified filter value with cn field in telephoneNumber. Set up the filter when configure number inquiry.i.e.,

(|(telephoneNumber=%)(Mobile=%) return all telephoneNumber or contacts with specified filter value in Mobile.

(&(telephoneNumber=%) (cn=*)) return all contacts with specified filter value and the set cn field in telephoneNumber. Set up the filter when configure mail inquiry.i.e.,

(|(mail=%)(mailBox=%)) return all contacts with specified filter value in Mail orMailbox .

(!(mail=%)) return all contacts without specified filter value in Mail ;

(&(mail=%) (cn=*)) return all contacts with specified filter value and the set cnfield in mail. Display onscreen name attribute, up to three attributes. Such as:%cn %sn %telephoneNumber Set up the max hit return to the LDAP server. If set to 0, the server will return all searched results. The default setting is 50. Set up the search timeout return after inputting search info.The default setting is 0. Set up whether to appy LDAP lookup for dial. The default setting is No. Set up whether to appy LDAP lookup for incoming call. The default setting is No. LDAP Number Filter LDAP Mail Filter LDAP Displaying Name Attributes Max Hits Search Timeout(ms) LDAP Lookup For Dial LDAP Incoming Call Lookup For Once configured, you can tap on Search button shown below. to input digits or name to search LDAP contact as Figure 64 GAC2500 Web GUI Maintenance-LDAP Book

: dial out.

:Add the LDAP contact to local Contacts. Follow the steps below to batch add LDAP contacts:

1. Search LDAP contacts;

2. Tap on to access add contact screen as shown below:

Firmware Version 1.0.1.x GVC2500 User Guide Page 72 of 88 3. Check contacts entries to add contacts to local. Figure 65 GAC2500 Add LDAP Contact To Local BS CONTACTS Please contact the administrator to configure before use BS Contacts, please refer to "GAC2500 Administration Guide" for more information.Once configured, tap on BS Contacts entry to access screen. CALL HISTORY Call History provides users access to phone's recent call records. The user can view all records, or select different categories for incoming calls, outgoing calls, missed call and conference. To access Call History, go to Home screen->APPLICATIONS->select

. Firmware Version 1.0.1.x GVC2500 User Guide Page 73 of 88 Figure 66 GAC2500 Call History Screen Click on a record in the call history and press to view call details for this number. to dial out this number directly. Tap one history entry

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Figure 67 GAC2500 Call History Details Note:

Call history displays all BlueJeans conference call history as well. Tap on to dial out directly and there is no need to input the password again. However, if the conference doesnt exist or the password has been changed, the re-dial will fail.

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ADD CONTACT FROM CALL HISTORY 1. Access Call History screen. 2. Select one call history entry to access details screen. 3. Tap on 4. Confirm to add contacts. in the upper right corner to access Add Contact screen;

Firmware Version 1.0.1.x GVC2500 User Guide Page 74 of 88 DELETE CALL HISTORY 1. Long press the call history entry you want to delete to access editing mode. 2. Check the entry and tap on

, click "OK" to delete. CONFERENCE SCHEDULE VIA CALL HISTORY 1. Select one call history entry you would like to add to scheduled conference. 2. Tap on in the upper right corner to access schedule screen. 3. Fill in information and tap on to save. MPK User could login the Web page and go to Advanced Settings->MPK LCD Settings or tap on MenuMPK to configure it. 1. Open MPK, tap on in the upper right corner to access Add Number page. Tap on to add number. As shown in figure 53. Figure 68 GAC2500 Add MPK Number Firmware Version 1.0.1.x GVC2500 User Guide Page 75 of 88 Figure 69 GAC2500 MPK Number List 2. Users could also tap on to add number directly from Contacts. See figure below. Figure 70 GAC2500 Add Number from Contacts 3. The MPK screen is shown in figure 56 after added numbers. Figure 71 GAC2500 MPK Number Screen EVENR LIST URL The Event List URI in MPK list, it requires server support. Users should firstly configure a Event List URI Firmware Version 1.0.1.x GVC2500 User Guide Page 76 of 88 including expanded list on the server (i.e.: BLF1006@myserver.com) and fill in URI without a domain name (i.e.BLF1006). FILEMANAGER FileManager allows users to delete, move, copy, paste, send, rename files (including files on storage device such as USB flash drive and SD card), and query file properties on the GAC2500. COPY FILE To copy the file from the GAC2500 to USB/SD storage device:

1. Insert USB/SD storage device into USB port on the GAC2500. It will take a few seconds for the GAC2500 to prepare the connection;

2. The USB storage icon will show on the status bar;

3. Go to Home screen->APPLICATIONS->FileManager;

4. Open the target folder;

5. Long press the file to select;

6. Tap on in the upper right corner to copy file and press to go back to the upper level directory. 7. Select target storage device and go to the directory where the file will be pasted to paste the file. SEND FILE The first 5 steps are the same as the ones in Copy File. in the upper right corner select "Send" option. 6. Tap on 7. Select target location and confirm to send file. If the user needs to send the file via Bluetooth, enable and connect Bluetooth device first. Otherwise, the interface will be redirected to the corresponding setting page to configure. DELETE FILE The first 5 steps are the same as the ones in Copy File. 6. Tap on in the upper right corner, a dialog will pop up for users to confirm whether to delete the file or not. 7. Press the "OK" key to delete the file successfully. RENAME FILE 1. Go to Home screen->APPLICATIONS->FileManager. 2. Open the target folder and select the file. 3. Press MENU key in the upper right corner and select "Rename". Firmware Version 1.0.1.x GVC2500 User Guide Page 77 of 88 Input the new file name in the pop-up dialog and press the "OK" key to save, tap on "Cancel" or press 4. to cancel. RECORDER Users could record conference, institution and personal notes via GAC2500 Recorder conveniently. There is no time limit to recording time and the larger the available storage capacity is, the longer the recording time is. Users could also find the recording file in the recorder and listen to it. Figure 72 GAC2500 Recorder Screen Long press the recording files to access editing interface, tap on the MENU key operations to recording files like export, rename, lock/unlock. to make other NORMAL RECORDER 1. Tap on in the upper right corner to access recording interface, Tap on to initiate recording. 2. Click "Save" to save the record file, click "Cancel" will bring out the dialog for users to confirm whether to save the file or not and to stop recording. Figure 73 GAC2500 Normal Recorder Firmware Version 1.0.1.x GVC2500 User Guide Page 78 of 88 Figure 74 GAC2500 Normal Record-Recording 3. Go back to the Recorder page, select one recording file and click on the right of the progress bar to play the file. CALL RECORDER In the process of an active call, the recording file will be saved on the phone. Users can only listen to it via Recorder. See figure 101 below. Firmware Version 1.0.1.x GVC2500 User Guide Page 79 of 88 RECORDER CONFIGURATION Figure 75 GAC2500 Call Recordings Tap on recording screen as shown below:

in the upper right corner on Recorder screen to sort the recording files, or access the Firmware Version 1.0.1.x GVC2500 User Guide Page 80 of 88 Figure 76 GAC2500 Recorder Settings Screen Enable Password. Enable and set password. Once set the password, input the password to access Recorder. No Enough Space for Recording. Set "Replace Old Audio" or "Stop and Save" when there is no enough space for recording. Set Maximum Recorder Space (MB). Set the maximum recording space on the device, you cannot view recording files vie FileManager. Set Export Location. It can be an SD card or external export device. DIAGNOSIS Users could make operation like LCD Diagnosis, Keypad Diagnosis, LED Diagnosison GAC2500 via built-

in Diagnosis app. BROWSER Users could browse webpage, view news and watch video via the built-in GAC2500 Browser. Press on in the main menu to open Browser. Slide up and down with slide gesture to scroll the screen. Zoom in/out the page via zoom gesture. Press the menu button in the upper right corner to open the menu bar for more operations. Firmware Version 1.0.1.x GVC2500 User Guide Page 81 of 88 GS MARKET GAC2500 provides direct access to apps via built-in GS market app. Users could download the apps from the market and install to the GAC2500. SEARCH APPS In the GAC2500 Home screen, click on Applications->GS Market by category, or input key words and click on SEARCH icon to search. Figure 77 GAC2500 GS Market

. The users could view the apps DOWNLOAD AND INSTALL APPS Users could see if the app has been installed or downloaded by pressing the blue shortcut key. Press MENU key to view the downloaded apps and installed apps. Tap on to cancel download in process. Tap on The installing process will be automatically started after downloading the app. to try again if the download failed. Go to Installed screen to view the installed apps, or tap on to uninstall the downloaded apps. UPDATE APPS The GAC2500 will automatically detect if there is new version available for the installed apps to upgrade when the network connection is normal. User can view the relevant information and update apps on the Installed screen. Firmware Version 1.0.1.x GVC2500 User Guide Page 82 of 88 GAC2500 WEB UI FEATURES ACCESSING GAC2500 WEB GUI The IP address of the GAC2500 displays on LCD display screen . To access the GAC2500 Web GUI:

1. Connect the computer to the same network as GAC2500. 2. Open a Web browser on your computer, enter the phones IP address in the address bar of the browser; for example: http://192.168.124.111;

3. Enter the administrators login and password to access the Web Configuration Menu. The default username and password are: admin, admin; you can set language to English or Chinese in the drop-

down menu of language. 4. Click "Login" to access the configurations in web UI. Figure 78 GAC2500 Web GUI-Login SAVING CHANGES When changing any settings on the web UI, always submit them by pressing the SAVE button on the bottom of the page, and then clicking the Apply button on the top of the page to apply the configuration changes. For those options with changes to take effect. next to it in the Web page, users must reboot the GAC2500 for the DEFINITIONS This section describes the 7 options in the GAC2500 Web GUI. Please view Advanced, Maintenance, Broadsoft and Status specifications in Administration Guide. Call Users could start conference and control conference from Web GUI. Contacts Contacts, Schedule, Call History. Account Contacts, Schedule, Call History, LDAP. Advanced General Settings, Call Features, Tone Generator, MPK General Settings, MPK LCD Settings. Maintenance Network Settings, Time & Language, Security Settings, Upgrade, Troubleshooting, Device Manager. Broadsoft Broadsoft, Broadsoft IM & P Status Account Status, Network Status, System Info. Firmware Version 1.0.1.x GVC2500 User Guide Page 83 of 88 You can log in as an administrator or a normal user. The following table shows the web pages accessible by normal user and administrator. Table 14 GAC2500 Users Access Permissions User Type Username Default Password Accessible Web Pages Normal User user 123 Settings Call Contacts Account: Call Settings Advanced: MPK General Settings, MPK LCD Maintenance: Network Settings, Time &

Language, Security Settings,Device Manager Status: Account Status, Network Status, System Info Administrator admin admin All pages TOOLBAR The web UI tool bar is on the upper right corner of the web UI page. Figure 79 GAC2500 Web UI Tool Bar Expert Once enabled, you can see more advanced settings. DND Turn on/off DND mode. Once enabled, the DND text will turn into red and all incoming calls will be rejected. English Select the display language for the web UI. Reboot Reebot the device. Logout Log out from the web UI. CALL PAGE GAC2500 Web UI call page is shown below. Users could make calls and initiate conference from Web UI. Figure 80 GAC2500 Web UI-Call Firmware Version 1.0.1.x GVC2500 User Guide Page 84 of 88 MAKING A CALL Enter phone number in input box and select call mode, tap on to dial out; Or select one call history entry in the list below and click on to dial out. CONFERENCE CONTROL When making a new call, initiating a conference or receiving an incoming call, the conference screen will pop up as shown below. Figure 81 GAC2500 Web UI-Conference Control CONTACTS PAGE This page lists Contacts, Schedule and Call History and LADP. CONTACTS Users could search/add/delete/edit contact on web page. The operations will be synchronized and can be viewed from LCD as well. The web UI contacts page is as shown below. Select "Import" option and you will find import screen on the right. Refer to chapter BATCH IMPORT Figure 82 GAC2500 Web UI-Contacts CONTACTS for more details. Select "Export" option and you will find export screen on the right. Refer to chapter EXPORT CONTACTS for more details. Select "Download" option and you will find download screen on the right. Refer to chapter DOWNLOAD CONTACT for more details. and you will find Add Contact screen on the right. Fill in contact information and and you will find Edit Contact screen on the right. Edit contact information and Click on save. Click on save. GROUPS GAC2500 supports up 7-way conference. If there are more than 6 conference members, tap on only dial the first 6 members in the group. will Figure 83 GAC2500 Web UI-Groups Firmware Version 1.0.1.x GVC2500 User Guide Page 85 of 88 SCHEDULE Conference can be scheduled, edited and deleted from web UI. Refer to chapter SCHEDULE for more details. Figure 84 GAC2500 Web Page-Schedule CALL HISTORY From web UI, users could also access Call history, which is synchronized with the call history from LCD. Figure 85 GAC2500 Web UI-Call History Firmware Version 1.0.1.x GVC2500 User Guide Page 86 of 88 EXPERIENCING GAC2500 Please visit our website: http://www.grandstream.com to receive the most up-to-date updates on firmware releases, additional features, FAQs, documentation and news on new products. We encourage you to browse our product related documentation, FAQs and User and Developer Forum for answers to your general questions. If you have purchased our products through a Grandstream Certified Partner or Reseller, please contact them directly for immediate support. Our technical support staff is trained and ready to answer all of your questions. Contact a technical support member or submit a trouble ticket online to receive in-depth support. Thank you again for purchasing Grandstream Audio Conference Phone, it will be sure to bring convenience and color to both your business and personal life. EU Compliance:

The device complies with EU EMF Directive 1999/519/EC can be used in the European Community. Hereby, (Grandstream Networks, Inc.), declares that this device (GAC2500 ) is in compliance with the essential requirements and other relevant provisions of Directive 1999/5/EC. FCC Caution:

Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

Firmware Version 1.0.1.x GVC2500 User Guide Page 87 of 88

- Reorient or relocate the receiving antenna.

- Increase the separation between the equipment and receiver.

- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

- Consult the dealer or an experienced radio/TV technician for help. Radiation Exposure Statement:

This equipment complies with FCC&CE radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator &

your body. END of Users Manual

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* Android is a trademark of Google Inc.

* Skype and Skype for Business are Registered Trademarks of Microsoft Corporation.

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Firmware Version 1.0.1.x GVC2500 User Guide Page 88 of 88