FCC ID: YZZGBX20 Extension Module

Grandstream Networks, Inc. 126 Brookline Ave, 3rd Floor Boston, MA 02215 USA Voice: (617) 566-9300 Fax: (617) 249-1987 www.grandstream.com For Warranty and RMA information, please visit www.grandstream.com GBX20 Extension Module Quick Installation Guide Content English...............................................................................1 EN The GBX20 is not pre-configured to support or car-

ry emergency calls to any type of hospital, law en-

forcement agency, medical care unit (Emergency Service(s)) or any other kind of Emergency Ser-

vice. You must make additional arrangements to ac-

cess Emergency Services. It is your responsibility to purchase SIP-compliant Internet telephone service, properly configure the GBX20 to use that service, and periodically test your configuration to confirm that it works as you expect. If you do not do so, it is your re-

sponsibility to purchase traditional wireless or landline telephone services to access Emergency Services. GRANDSTREAM DOES NOT PROVIDE CON-

NECTIONS TO EMERGENCY SERVICES VIA THE GBX20. NEITHER GRANDSTREAM NOR ITS OF-

FICERS, EMPLOYEES OR AFFILIATES MAY BE HELD LIABLE FOR ANY CLAIM, DAMAGE, OR LOSS. YOU HEREBY WAIVE ANY AND ALL SUCH CLAIMS OR CAUSES OF ACTION ARISING FROM OR RELATING TO YOUR INABILITY TO USE THE GBX20 TO CONTACT EMERGENCY SERVICES, AND YOUR FAILURE TO MAKE ADDITIONAL AR-

RANGEMENTS TO ACCESS EMERGENCY SER-

VICES IN ACCORDANCE WITH THE IMMEDIATELY PRECEDING PARAGRAPH.

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PRECAUTIONS:

WARNING: Please DO NOT power cycle the GBX20 during system boot up or firmware upgrade. You may corrupt firmware images and cause the unit to malfunction. WARNING: Use only the power adapter included in the GBX20 package. Using an alternative non-qualified power adapter may possibly damage the unit. OVERVIEW:

GBX20 delivers additional functionality, versatility and flexibility to Grand-

stream GRP2615 Carrier-Grade IP Phone or GXV3350 High-End Smart Video Phone for AndroidTM. The GBX20 module features a large 480x272 graphic LCD and 20 programmable buttons (each with dual color LED). In addition, it allows up to 40 extensions per module by using the 2 page switch keys and up to 160 buttons when 4 extension modules are daisy-chained together. The GBX20 module is connected, powered, and controlled by the GRP2615/GXV3350, providing the benefits of the additional keys instantly. The GBX20 supports the traditional call features on each of its program-

mable buttons, including BLA (bridged line appearance)/SCA (shared call appearance), BLF (busy lamp field, standard or eventlist), Call Park/Pick-

up, Speed Dial, Presence, Intercom, and conference/transfer/forward. The GBX20 is the ideal solution for offices that manage high call volumes or an office receptionist. By using the GBX20 the telephone attendant can ensure maximum office productivity by efficiently monitoring and dispatching multiple incoming calls. PACKAGE CONTENTS:

1x GBX20 Extension Board Stand 1x Extension Board Connector Plate 1x TypeA-MicroB USB Cable 1x GBX20 Exten-

sion Board 12V 1x 12V/1A Power Adapter 1x Screw 1x Quick Installa-

tion Guide

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INSTALLING GBX20 EXTENSION MODULE:

1. On the back of GBX20 and the phone, there are slots for the connector plate. Attach the connector plate between the slots for GBX20 and the extension board. Remove the rubber cov-

ers on the back of the GBX20. You will see the slots for the connector plate. EXT Port to link the GRP2615/GXV3350 EXT Port to link another GBX20 TIPS FOR USING THE GBX20:

1. Power up the GRP2615/GXV3350, the GBX20 extension board will show the booting up screen with version information and connecting status. 2. After successfully booting up, the extension board will stay in idle. Press and hold the Left key for 3 seconds to check the version information and status. 3. Press any key to return to normal display. 4. Press Left or Right key to switch between two pages if there are multi-

purpose keys configured in both pages. 5. Press the multi-purpose key to perform the assigned function. EXT Port to link the GBX20 Multi-Purpose Keys 2. Apply the screw provided and securely tighten it in. 3. Connect the extension board to the phone via the EXT port using the USB cable provided. 4. Install both stands on the phone and the GBX20 board. Note: In case two or more GBX20 extension modules are connected to the GRP2615/GXV3350, the second GBX20 needs to be powered on by a 12V/1A PSU.

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Left Key Right Key CONFIGURING GBX20 EXTENSION MODULE:

After the GBX20 is successfully booted up and connected to the GRP2615/

GXV3350, the GBX20 can be configured via the host GRP2615/GXV3350s web GUI. 1. Login the GXV3350/GRP2615 web GUI and configure multiple purpose keys for extension board 1/2/3/4 under web GUI Applications Pro-

grammable Keys GBX20 Settings page. 2. On the GRP2615/GXV3350 extension board (i.e., GBX20), press LEFT or RIGHT button to browse all the MPK Programmable Keys status in different pages. 3. For more configuration information, please refer to the GRP2615 or GXV3350s user manual. Refer to online documents and FAQ for more detailed information:

http://www.grandstream.com/our-products

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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:

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.

EXHIBIT C - EUT INTERNAL PHOTOGRAPHS EUT Cover off View EUT Main Board Top View EUT Main Board Bottom View EUT LCD Top View EUT LCD Bottom View

EXHIBIT B - EUT EXTERNAL PHOTOGRAPHS EUT All View EUT Front View EUT Rear View EUT Top View EUT Bottom View EUT Left Side View EUT Right Side View EUT Adapter 1 View (FRECOM) EUT Adapter 1 Label View (FRECOM) EUT Adapter 2 View (MASS POWER) EUT Adapter 2 Label View (MASS POWER) EUT Adapter 3 View (Sunlight) EUT Adapter 3 Label View (Sunlight) EUT USB Cable View

EXHIBIT A - FCC ID LABEL AND LOCATION FCC ID Label FCC ID Label Location Information The label shown shall be permanently affixed at a conspicuous location on the device and be readily visible to the user at the time purchase (Labeling requirements per 2.925)

Grandstream Networks, Inc. 126 Brookline Ave, 3rd Floor Boston, MA 02215, USA Tel: 1-617-5669300 Fax: 1-617-2491987 Email: nwei@grandstream.com FCC Authorization Date: 2019-08-02 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Agent Authorization To whom it may concern:

We Grandstream Networks, Inc., the undersigned, hereby authorizes Bay Area Compliance Laboratories Corporation to act on its behalf in all matters relating to application for Equipment authorization, including the signing of all documents relating to these matters. All acts carried out by Bay Area Compliance Laboratories Corporation on our behalf shall have the same effect as our own action. We, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. This authorization is valid until further written notice from the applicant. Sincerely Yours, Signature:

Ning Wei Manager QA-FR-170-B 7/29/2014

Grandstream Networks, Inc. 126 Brookline Ave, 3rd Floor Boston, MA 02215, USA Tel: 1-617-5669300 Fax: 1-617-2491987 Email: nwei@grandstream.com FCC Confidential Authorization Date: 2019-08-02 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Confidentiality Request regarding application for certification of FCC ID: YZZGBX20 In accordance with Sections 0.457 and 0.459 of the Commissions Rules, Grandstream Networks, Inc. hereby requests long-term confidential treatment of information accompanying this application as outlined below:

Block Diagram Schematics Operation Description The above materials contain proprietary and confidential information not customarily released to the public. The public disclosure of these materials provides unjustified benefits to its competitors in the market. Sincerely Yours, Signature:

Ning Wei Manager