FCC ID: T7HCT8431 RTX8431 DECT Handset

6.5.8 Line If the handset is used in a multiline environment, it is possible to select preferred lines for the handset to make outgoing calls from this Line menu as shown below. NOTE: To see additional information on this Line feature, please check the base system document via [2]. 6.5.9 Reset settings The handset settings can be reset to default settings by selecting menu Reset settings. As it can be seen above, the handset PIN code is required to reset the handset to its default settings. After such a reset the handset is still registered. The base is not reset to default when selecting this feature. 6.5.10 Status The menu Status delivers some useful information to the end user such as Handset and Base station status. Page | 41 SME VoIP Handset Guide 4.8 Proprietary and Confidential The displayed information is as follows. Base station:

Software version (the current software version of the base station) Hardware version (the hardware version of the base station) IP address (the IP address of the base station)

- MAC address (the MAC address of the base station)

System name (the name of the system of base stations that the handset is registered to) Handset status:

Software version (the current software version of the handset) Hardware version (the hardware version of the handset) DECT band (the DECT band that the handset is using, e.g. EU or US) Battery level (the current battery level of the handset) IPEI (the IPEI/IPUI number of the handset is a static number identifying the specific handset) 6.5.11 Auto Answer In this menu it is possible to change the settings for auto answer on the handset. The Auto answer feature makes it possible for the handset to automatically answer an incoming call. This setting can be set to the following conditions:

Normal With this enabled the handset does not answer a call automatically, but the user must always press the green Off-hook key to answer a call. The call is not answered by removing the handset from the charger. Any key In this mode pressing any key on the keypad (except from the red On-hook key, and the three softkeys that still have their different functions) will answer an incoming call. The call is not answered by removing the handset from the cradle/charger. Automatic If the feature Automatic is enabled on the handset, then the incoming call is answered automatically after 5 seconds. SME VoIP Handset Guide 4.8 Proprietary and Confidential Page | 42 6.5.12 Silent Charging The option of Silent charging enables the possibility of the handset not ringing during charging. The handset must be placed in the charger in order for this to work as mentioned below. The options of silent charging are seen below. Off The handset is ringing when receiving incoming calls (audio alert and incoming call screen displayed). Silent The handset receives an incoming call as normal, but it does not ring (i.e. no audio alert but the incoming call screen is displayed). 6.5.13 Do Not Disturb This Do not disturb feature is to be used when the handset user does not want to be disturbed. With this feature disabled, the handset reacts as normal on all incoming activities. If the function is enabled, though, the handset will not react, and the calling counterpart will be directed to voice mail if this feature is enabled. The Do not disturb icon is displayed in the status bar when Do not disturb is enabled on the handset. SME VoIP Handset Guide 4.8 Proprietary and Confidential Page | 43 6.5.14 Hide Number The Hide Number function enables that the user can make a call where the counterpart cannot see the caller ID of the caller. Off When the Hide Number function is set to Off with the left softkey, the caller ID of the handset is displayed to the counterpart of the call. On for next call If this function is enabled, then the caller ID will be hidden to the counterpart only for the next outgoing call, and then for the following calls the number will not be hidden anymore. Always on With the Always on enabled, the caller ID will be hidden for the counterpart for all outgoing calls initiated until this feature is disabled again. NOTE: When hide number enabled, base sends SIP header Privacy: id to address sip:anonymous@anonymous.invalid The PBX must support anonymous calls otherwise the call will be rejected, and the handset cannot make an outgoing call if this feature is enabled. SME VoIP Handset Guide 4.8 Proprietary and Confidential Page | 44 6.5.15 Call Forward The Call Forward feature enables the user to forward all incoming calls in different cases as described below. Forward Unconditionally If this feature is enabled all incoming calls to the handset will be forwarded to the number setup in Forward To as seen below. In this case the handset will not receive any incoming calls, but all calls will automatically be forwarded to the number setup in Forward To. Forward No Answer This feature controls if incoming calls to the handset should be forwarded if the call is not answered. By enabling Forward No Answer incoming calls to the handset are forwarded if the call has not been answered during a certain time period as for example 90 seconds [Forward After (s)]. This feature is setup in the same way as Forward Unconditionally as displayed above. SME VoIP Handset Guide 4.8 Proprietary and Confidential Page | 45 Forward Busy The Forward Busy function controls if the handset will forward the call when busy; e.g. when the user is in another call. When Forward Busy is enabled, the handset forwards all incoming calls if the handset is busy, or if the user presses Reject on the call. This feature is enabled in the same way as Forward Unconditionally which is showed above. 6.5.16 Idle Screen Saver The idle screen saver has the function that when the handset is in the charger, the handset screen will dim the lights, but never turn off if this feature is enabled. Idle clock (dimmed) By choosing this option the handset will show the idle screen with dimmed lights when the handset enters power save mode when in charger. Startup image (dimmed) If this option is selected the handset will show the startup image with dimmed lights when the handset enters power save mode when in charger. SME VoIP Handset Guide 4.8 Proprietary and Confidential Page | 46 6.5.17 Idle Clock The Idle Clock function controls if the clock is showed in the idle display or not. By selecting Off the idle clock will not be displayed in idle, and by selecting On the clock is displayed in idle. 6.5.18 Function keys As mentioned at the beginning of the document, the handset has extra 4 keys placed at the bottom. The purpose of the keys is the ability to program them with the desired menus for faster access. To do so, select the Function keys parameter and choose which key should be programmed. Ignore key press If this option is enabled, the function key will not work as it will ignore the users action. Speed dial By selecting this parameter, the user has the possibility of assigning a contact number to the key in order to call the person only by pressing the function key Shortcuts This option allows the user to choose from a list of menus which can be programmed to the selected function key. This means that if the user selects to assign the Inbox menu to the Function key 1, when the key is pressed, the Inbox menu will open. SME VoIP Handset Guide 4.8 Proprietary and Confidential Page | 47 6.6 Messaging The text messaging function makes it possible to send text messages to other handsets on the system. From idle the text messaging menu is reached by pressing the menu activity key Messaging menu as displayed below.

, and then selecting the 6.6.1 How to Setup Text Messaging For the text messaging function to work on the handset, this needs to be enabled on the base station web interface. As seen above the text messaging feature is enabled on the handsets via Management on the base station web interface. With this feature enabled it is possible to send text messages from one handset on the system to another handset on the system. In this case, the Text Messaging needs to be enabled (with or without a server). SME VoIP Handset Guide 4.8 Proprietary and Confidential Page | 48 Additionally, it is possible to send the text messages via a text messaging server (MobiCall server) which enables handsets on different systems of base stations to send text messages to one another. When using a text messaging server for text messaging, the Text Messaging must be Enabled, the Text Messaging & Alarm Server needs to be filled out, and the correct port number must be entered in Text Messaging Port. An example of this is seen below:

For further information on the text messaging feature and setup on the base station see the base station manual via reference [3]. 6.6.2 How to Write a New Message When opening the menu Messaging the menu Drafts is reached, and it is possible to write a new message by pressing the middle navigation key, or the middle softkey called New. As displayed above, pressing New makes it possible to write a new message using the keypad. The maximal message text length is 160 characters, and the number of characters typed are displayed at the bottom right corner of the text field. SME VoIP Handset Guide 4.8 Proprietary and Confidential Page | 49 To choose other symbols than those available on the keypad press the middle softkey Symbol, and an amount of symbols will be available to select. If in need of deleting what has just been written the right softkey Clear can be pressed, and the previous character is hereby deleted. NOTE: Use the

-key to switch between the input modes Abc, ABC, 123, and abc. 6.6.3 How to Send a New Message When a new message has been written, press the left softkey Send to send it. By pressing Send, two options are presented. The message can either be sent as Normal, or as Urgent. Normal If a message is sent as Normal, the message is displayed as normal in the counterparts inbox. Urgent When a message is sent as Urgent, the message is displayed with an exclamation mark in the counterparts inbox, and with an exclamation mark in the Sent messages. Urgent messages are always displayed at the top of the inbox. Choosing either of these two options, three different possibilities are given as to who the message can be sent to as seen above. Contacts By selecting this option the contact list is displayed, and the message can be sent to one of the local contacts in the contact list. Enter number In this option it is possible to enter a number, and thereby sending a message to this number. Central directory Selecting the Central directory option opens the central directory list of contacts and makes it possible to send the message to contacts in this list. SME VoIP Handset Guide 4.8 Proprietary and Confidential Page | 50 6.6.4 How to Open and Reply to a Message When a new message is received on the handset, the idle screen is displayed as seen on the first picture in the sequence below. Press the left softkey to reply to the received message. The reply message can either be sent as Normal or Urgent. When choosing either of these two options and the contact number as seen in the previous chapter, the message is sent to the counterpart. NOTE: When a new message is received and has not yet been read the following message icon the status bar at top of the display. is displayed in 6.6.5 Four Messaging Submenus When opening the messaging menu, it is possible to select the four submenus: Drafts, Inbox, Sent messages, and Settings. The submenus are organized in tabs whereby the left and right navigation keys are used to navigate between them. The content of these four submenus are described in the following sections. 6.6.6 Inbox Inbox is the submenu that is opened when the Messaging menu is selected. This menu contains all received messages on the handset. By pressing the middle softkey Reply it is possible to reply to the highlighted message. When selecting a highlighted message with the left softkey Select this message is opened, and it is possible to use the left softkey to reply, or to enter the More option described below directly from the message. SME VoIP Handset Guide 4.8 Proprietary and Confidential Page | 51 6.6.6.1 The More Option The right softkey More gives a list of options in the inbox which are described below. Reply With this option it is possible to reply the counterpart of the received message. Forward By selecting Forward, the newly received message is entered again, and can be edited and forwarded to another number. Save as contact With the function Save as contact it is possible to save the number that the message was received from in the local phonebook. Append to contact With the Append to contact option it is possible to append the number that the message came from to an already existing contact in the local phonebook of the handset. Delete message By pressing Delete message either Yes can be pressed to delete the message, or No can be pressed return to the Inbox menu. Delete all messages This option gives the possibility to delete all messages in the messaging inbox, and a Yes or No option is given. By pressing the left softkey Yes all messages in the inbox are deleted, by pressing the right softkey No the handset goes to the message inbox. SME VoIP Handset Guide 4.8 Proprietary and Confidential Page | 52 6.6.7 Drafts When pressing the right navigation key one time in the messaging menu, the submenu Drafts is opened. In this menu drafts are saved if a message has been written but was not sent. When pressing select on a highlighted draft, this is opened according to the last time that it was edited, and it is possible to edit it, and send it again. To write a new message press the middle softkey New in this Drafts menu (this function is described in more detail in section 6.6.2 How to Send a New Message) 6.6.7.1 The More Option When pressing the right softkey More in Drafts it gives the three possibilities that is displayed and explained below. The option Send message enters the message to edit and send. If Delete message is chosen the current message can be deleted, and Delete all messages gives the possibility to delete all messages in the Drafts menu. SME VoIP Handset Guide 4.8 Proprietary and Confidential Page | 53 6.6.7.2 What is Stored in Drafts?

When writing a new message and then exiting with the red on-hook key before the message is sent, this message can be saved as a draft. This is displayed below. By pressing the left softkey Yes the message is saved as a draft and can be opened again in the Drafts menu. If the right No softkey is pressed the message is not stored as a draft, and the handset returns to the previously opened menu without saving the message. 6.6.8 Sent Messages In the Sent messages menu a complete list of the messages sent from the handset is displayed. To open a sent message, scroll up/down to highlight it, and then press the left softkey Select. By pressing the middle softkey, the message is opened, and it is possible to forward it to another handset than it was originally sent to. SME VoIP Handset Guide 4.8 Proprietary and Confidential Page | 54 6.6.8.1 The More Option When pressing the right softkey More a list of options is given as seen below. 6.6.9 Settings In the Settings menu it is possible to set messaging options on or off. These options will be described below. Overwrite old If this option is set to On with the left softkey, then the oldest messages are overwritten if the maximum number of messages is reached. The maximum number of messages that can be stored in drafts, inbox, and sent messages is 250. If the number of 250 messages is exceeded, and the option is set to Off then no new messages can be received before deleting some old messages manually. Sent Messages If this function is set to On then the sent messages will be saved, whereas the sent messages will not be saved if it is set to Off. SME VoIP Handset Guide 4.8 Proprietary and Confidential Page | 55 Display This function controls if the content of new messages is displayed in idle when they are received, or if it is just displayed that a new message has been received. Below, it is displayed how the two settings are displayed in idle when a new message is received. Display > On Display > Off 6.8 F-Keys The F-Keys menu is entered through the menu by pressing the activity menu key controls functional keys to be set on the handset. This means that the handset user can add certain functional numbers in this menu; as for example the number to the users mailbox. in idle. This menu SME VoIP Handset Guide 4.8 Proprietary and Confidential Page | 56 When there are F-Keys saved in the list it is possible to call each F-Key number by pressing the left softkey Call. Additionally, each F-Key contact can be edited directly from the F-Key list by pressing the middle softkey Edit. When pressing the right softkey More the following options are possible to select. Add F-Key To add a new F-key press the right softkey More and it is possible to add a new functional key. In the case of e.g. adding a users mailbox, pressing the right softkey Edit makes it possible to enter the name and number, respectively. For the new F-key to be saved, press the left softkey Save, and this F-key is added to F-keys. Edit F-Key This feature enables an existing F-key to be edited, if the name or number needs changes. Delete F-Key By selecting Delete F-Key the message Delete current contact from F-Key list? appears on the screen, and it is possible to press the left softkey Yes, to delete the currently highlighted F-Key, or to press the right softkey No, to cancel and go back to the F-Keys menu. Delete all F-Keys With this function it is possible to delete all the saved F-Keys on the handset. When selecting Delete all F-Keys the message Delete entire F-Key list? appears, and by pressing left softkey Yes, this action is performed, whereas pressing the right softkey No, cancels the action and returns to the F-Keys menu. Speed dial When selecting Speed dial, the list with speed dial numbers appears. Those are the numbers that are assigned to keys 2-9. From this menu it is possible to add the chosen F-Key to a speed dial number with the left softkey Add. If an already existing speed dial entry is highlighted the left softkey gives the opportunity to Replace the current speed dial entry with this one. To delete a speed dial entry, press the right softkey Delete and the entry is deleted straightaway. NOTE: This speed dial list uses both contacts from the contact list, and from the F-Keys list. For additional information on this feature see the section 6.1.4 Speed Dial/On Touch Dial. SME VoIP Handset Guide 4.8 Proprietary and Confidential Page | 57 7 Calls Operations In this section the different types of calls and call handling are described. 7.1 Incoming call As the handset receives an incoming call an alerting screen will be displayed as seen below. This will be accompanied by a ring signal and/or a vibrating handset according to the respective settings on the handset. The calling partys handset number will be shown in the display, and an additional name is displayed if the calling partys handset number is stored in the local phonebook. 7.1.1 Answering an Incoming Call To answer an incoming call, press the green Off-hook button answer the call in speaker mode.

, or press the Loudspeaker key to NOTE: When Auto answer is set to Automatic an incoming call is answered automatically after one ring signal. If Auto answer is set to Any key an incoming call can be answered by pressing any key on the keypad, and not just the green Off-hook button. 7.1.2 Reject an Incoming Call It is possible to reject an incoming call by pressing the right softkey Reject when receiving an incoming call. This way the calling party will receive a busy tone, and User busy displayed on the screen as shown in the picture below. NOTE: An incoming call can also be rejected by pressing the red On-hook key. SME VoIP Handset Guide 4.8 Proprietary and Confidential Page | 58 7.1.3 Silencing an Incoming Call When the handset is alerting it is possible to press the left softkey Silent whereas the handset will continue to alert, but without any heard ringing. 7.1.4 Ending a Call To end an ongoing call, press the red On-hook key call is shown in the display. Furthermore, this duration time can also be viewed from the call list where the call is stored.

, and the call will be terminated. The duration of the NOTE: If one call is active and another call is on hold, then the active call will be terminated when pressing the red On-hook button, and the handset automatically returns to the call on hold; i.e. the call on hold is now active, and the user must press the red On-hook button again to terminate this call. 7.2 Initiating a Call A call can be initiated from different locations on the handset:

By entering the number directly from idle From the Contacts menu From the Calls menu From the Central Directory How to initiate a call from these different directories is explained in the following sub sections. 7.2.1 Initiating a Call from Idle When initiating a call, it must be done according to the following:

1. Enter the number of the person you want to call when the handset is in idle. 2. Press the green Off-hook button to call the number. 3. The handset will show a Calling screen as seen above. 4. When the counterpart answers the call, the screen will show Connected, and the two parts are now in call. 7.2.2 Initiating a Call from Contacts To initiate a call from the contact list, there must be contacts added to the local phonebook. When this prerequisite is met, a local contact can be called by highlighting the contact in the contact list and then pressing the left softkey Call, or pressing the green Off-hook button. NOTE: The list of local contacts can be reached from the menu Contacts or directly from idle by pressing the left softkey when in idle. SME VoIP Handset Guide 4.8 Proprietary and Confidential Page | 59 7.2.3 Initiating a Call from Calls The number of outgoing, incoming, or missed calls can be called directly from the call list by highlighting the number and pressing the left softkey Call or the green Off-hook button to call the entry. NOTE: The Calls list can be reached from the menu Calls or directly from idle by pressing either the green Off-hook button or the right softkey when in idle. 7.2.4 Initiating a Call from the Central Directory When opening the Central directory a call can be made to a specific contact by searching for this contact and thereby enter the list from which a contact can be called by pressing the green Off-hook key. If different numbers are assigned to one contact a green arrow is showed to the right of the contact, and the right/left navigation keys can be used to choose which number that should be called. NOTE: The Central Directory can be reached both from the menu Central Directory or directly from the idle by pressing the middle softkey when in idle. 7.3 Call Holding/Retrieving It is possible to hold a call which means that the one party of the call is put on hold and cannot hear the other party but can only hear a repeated short tone on hold until the call is retrieved. 1. To put the counterpart of the call on hold press the left softkey Hold and this party is put on hold. 2. To retrieve the call, and thereby continue the conversation, press left softkey Retrieve which is only showed on the screen when the other party of the call is put on hold. NOTE 1: If one call is active and another call is on hold, then the active call will be terminated when pressing the red On-hook button, and the handsets automatically return to the call on hold, i.e. the call on hold is now active and the user must press the red On-hook button again to terminate this call. NOTE 2: When the counterpart is put on hold it is also possible establish a second call and make a conference, swap or transfer which will be explained in the following sections. 7.4 Attended and Unattended Transfer of a Call When in an ongoing call, it is possible for either party to transfer the call, either attended or unattended, to another handset. SME VoIP Handset Guide 4.8 Proprietary and Confidential Page | 60 7.4.1 Attended Transfer In an attended transfer the party that call is transferred to, is called before the transfer is made. The procedure to do this is as follows. 1. Initiate a call with a counterpart, so that the handset displays Connected as shown below. 2. Press the right softkey Transfer on either of the handsets in call, and the counterpart of the call is put on hold. 3. Enter the number that the transfer should be made to, and press the green Off-hook button 4. A ring back tone is heard, and a third party is called. 5. As the third party answers the call the handset user initiating the transfer will show a connected screen as seen above. 6. To make the transfer after the third party has answered the call, press the right softkey Transfer, and the call is transferred so that the second and third party are now in call, and a Call ended screen is displayed on the handset that initiated the transfer as seen above. NOTE: It is also possible to make an attended transfer by pressing either the left softkey Hold, or the middle softkey Conf. instead of pressing the right softkey Transfer in step 2. 7.4.2 Unattended Transfer When making an unattended transfer, the call will be transferred directly to a third party without the party initiating the transfer needing to call this third party before the transfer. SME VoIP Handset Guide 4.8 Proprietary and Confidential Page | 61 Initiate a call with a counterpart so that the handset displays Connected as shown above. 1. 2. Press the right softkey Transfer on either of the handsets in call, and the counterpart of the call is put on hold. 3. Enter the number that the transfer should be made to, and press transfer. 4. This will end the call on the first handset party (screen showing Call ended) and the second party will stop being on hold and hear a ring back tone instead, which indicates that this handset is now calling the third party. 5. When the third party answers the call, an unattended transfer has been made and the second and third party are now in call. NOTE: As with attended transfer, it is also possible to make an unattended transfer by pressing either the left softkey Hold, or the middle softkey Conf. instead of pressing the right softkey Transfer in step 2. SME VoIP Handset Guide 4.8 Proprietary and Confidential Page | 62 7.5 Swap between Two Calls It is possible to swap between two calls. In this case, one party will be in ongoing call, and the second party will be on hold. I.e. Swap means that it is possible to toggle between these two parties. Initiate a call with a counterpart so that the handset displays Connected as shown above. 1. 2. Put this call on hold by pressing the left softkey Hold. 3. Enter the number of a second party and press the green Off-hook button. 4. A ring back tone is now heard in the handset, as the second party is alerting. 5. As the second party answers the call a Connected screen as above is displayed. 6. By pressing the left softkey Swap the ongoing call is now back to the first party, whereas the second party is now put on hold. 7. From this point, it is possible to toggle between the two parties by pressing Swap. For each time that Swap is pressed a toggle is made between the two external parties, and the Connected screen shows the phone numbers to indicate if it is the first or second call that is ongoing. SME VoIP Handset Guide 4.8 Proprietary and Confidential Page | 63 7.6 Call Waiting When two parties are in call it is possible to receive a call waiting on one of the handsets. This means that a third party calls one of the two parties already in a call. During a call waiting two short beeps are heard every three seconds in the handset receiving the call waiting, and the following screen is displayed:

In this case it is seen that the call waiting is from party 526. It is possible to reject the call waiting with the right softkey Reject, and hereby continuing the ongoing call with the first party. If the call party wants to answer the call waiting, the green off-hook key should be pressed, and the following screen is displayed:

This indicates that the party now has two ongoing calls with one of them on hold (525), and it is possible to swap between them, make a conference, or transfer one of the parties. SME VoIP Handset Guide 4.8 Proprietary and Confidential Page | 64 7.7 Conference Call In a conference call there are always at least three parties in the same conversation. Hereby, this feature enables the user to have an ongoing call with more than one person the parties in a conference call are called participants. 7.7.1 Establishing a Conference Call In the following, it is described how to establish a conference call between three parties. Initiate a call with a counterpart so that the handset displays Connected as shown below. 1. 2. Press the middle softkey Conf. to start a conference call. 3. The second party is put on hold and will hear a tone on hold. 4. Enter the number of the party to invite to the conference and press the green Off-hook button to call this participant. 5. When the called party answers the call, the second party is still on hold, and the conversation is only between the third party and the first party, i.e. initiator of the conference. 6. To start conversation between the three parties i.e. a conference press the middle softkey Conf. The Conference screen as seen below will then be displayed, and the three participants will be in a conference call. Thereby the conversation is between all three parties NOTE 1: It is possible to invite more participants to the conference by repeating the steps 2. 6. for one of the participants in the conference that has not yet invited a party to the conference. Once a participant has invited a new party to the conference it is not possible for this participant to invite new parties to the conference. NOTE 2: The maximal number of participants to participate in a conference call is set according to the number of bases in a system. On a system with two bases it should be possible to have 10 participants in a conference call. SME VoIP Handset Guide 4.8 Proprietary and Confidential Page | 65 7.7.2 Terminating a Conference Call When a conference call is terminated it is dependent of which participant that terminates it, if the whole conference is terminated, or if the conference is ongoing between the two participants left in the conference. Option 1 1. The user who has started the conference presses the red On-hook key to terminate the conference call. 2. The whole conference is terminated, and none of the participants continue to be in call. Option 2 1. One of the participants that have been invited to the conference presses the red On-hook key to terminate the conference call. 2. The call is only terminated for the participant that terminated the call 3. There is still an ongoing call between the initiator of conference and the participant that has not ended the call. NOTE: Different configurations on the PBX that the base system uses may result in different terminations of a conference call. E.g. the configuration of some PBXs could cause that the whole conference call is not terminated if the initiator of the conference presses the red On-hook key to terminate. SME VoIP Handset Guide 4.8 Proprietary and Confidential Page | 66 8 Accessories It is possible to get different accessories to the RTX SME VoIP 8431 handset. These different accessories are listed in the following:

- Single Charger

- Adapter for Charger

- Belt Clip

- Battery

- Battery Cover SME VoIP Handset Guide 4.8 Proprietary and Confidential Page | 67 9 Troubleshooting This troubleshooting section contains information on how to solve some operational problems that you may experience on the handset. 9.1 Operational problems State: The handset does not ring Problem cause: The sound off icon is seen in the status bar; hence the handset is silent mode. Action: Increase the volume in Audio Settings, or long press the #-key in idle. NOTE: If the Audio Settings is greyed out and cannot be changed, it is because the silent mode is enabled by long pressing the #-key. Please, long press the #-key in idle to disable this silent mode. State: The handset does not respond when pressing on the keys Problem cause: The keylock is enabled, and a Press and hold * screen is displayed when pressing any key. Action: Long press (press for more than 2 seconds) the *-key. State: The handset shows Searching in the display Problem cause: The handset is out of the coverage area of the base station system. Action: Please move the handset back in coverage of the base system. FCC Warning 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. 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. SME VoIP Handset Guide 4.8 Proprietary and Confidential Page | 68 For Handset SAR tests are conducted using standard operating positions accepted by the FCC with device transmitting at its highest certified power level in all tested frequency bands, although the SAR is determined at the highest certified power level, the actual SAR level of the device while operating can be well below the maximum value. Before a new model device is an available for sale to the public, it must be tested and certified to the FCC that it does not exceed the exposure limit established by the FCC, tests for each device are performed in positions and locations as required by the FCC. For body worn operation, this model device has been tested and meets the FCC RF exposure guidelines when used with an accessory designated for this product or when used with an accessory that contains no metal. For Base This equipment complies with FCC 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. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter located or operating in conjunction with any other antenna or transmitter. Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. ISEDC Warning This device complies with ISEDC licence-exempt RSS standard(s). Operation is subject to the following two conditions:

(1) this device may not cause interference, and

(2) this device must accept any interference, including interference that may cause undesired operation of the device. Le prsent appareil est conforme aux CNR d'ISEDC applicables aux appareils radio exempts de licence.L'exploitation est autorise aux deux conditions suivantes :

(1) l'appareil nedoit pas produire de brouillage, et

(2) l'utilisateur de l'appareil doit accepter tout brouillage radiolectrique subi, mme si le brouillage est susceptible d'en compromettre le fonctionnement. ISEDC Specific Absorption Rate (SAR) information For Handset SAR tests are conducted using standard operating positions accepted by the ISEDC with device transmitting at its highest certified power level in all tested frequency bands, although the SAR is determined at the highest certified power level, the actual SAR level of the device while operating can be well below the maximum value. Before a new model device is a available for sale to the public, it must be tested and certified to the ISEDC that it does not exceed the exposure limit established by the ISEDC, tests for each device are performed in positions and locations as required by the ISEDC. For body worn operation, this model device has been tested and meets the ISEDC RF exposure guidelines when used with an accessory designated for this product or when used with an accessory that contains no metal. For Base This equipment complies with ISEDC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the r a diator& your body. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. SME VoIP Handset Guide 4.8 Proprietary and Confidential Page | 69 ISEDC Radiation Exposure Statement:

For Handset SAR lutilisation des rgles sma lemplacement Le matriel de transmission et fonctionnant dans tous les essais la certification, mme si la puissance suprme a dcid le niveau, utilisation spcifique peut tre trs en de de la valeur de rfrence maximale.Types de matriel sont vendus au public un ancien, dessai et de certification de lexposition, limite maximum sma, chaque document et lemplacement du materiel dessai et conformment au document.Le modle en physique, matriel dessai et conforme aux directives dexposition des radiofrquences sma quand une annexe dsign pour ce produit lors de leur utilisation ou des pices de rechange ne contiennent pas de mtal. For Base Cet quipement est conforme aux limites d'exposition aux radiations ISEDC dfinies pour un environnement non contrl. Cet quipement doit tre install et utilis avec une distance minimale de 20 cm entre le radiateur et votre corps. Cet metteur ne doit pas tre situ ou fonctionner conjointement avec une autre antenne ou un autre metteur. This product meets the applicable Innovation, Science and Economic Development Canada technical specifications. SME VoIP Handset Guide 4.8 Proprietary and Confidential Page | 70

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)

RTX Hong Kong Ltd. ADD: 8/F Corporation Square,8 Lam Lok Street, Kowloon Bay, Hong Kong Tel: +852 24873718 Fax: +852 24806121 Email: TED@rtx.hk FCC Authorization Date: 2019-11-11 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Agent Authorization To whom it may concern:

We, RTX Hong Kong Ltd., 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 Laboratory Corporation on our behalf shall have the same effect as our own action. We, RTX Hong Kong Ltd., 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 d, A Ted Chong Engineering Manager QA-FR-170-B

RTX Hong Kong Ltd. ADD: 8/F Corporation Square,8 Lam Lok Street, Kowloon Bay, Hong Kong Tel: +852 24873718 Fax: +852 24806121 Email: TED@rtx.hk FCC Confidential Authorization Date: 2019-11-11 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Confidentiality Request regarding application for certification of FCC ID: T7HCT8431 In accordance with Sections 0.457 and 0.459 of the Commissions Rules, RTX Hong Kong Ltd hereby requests long-term confidential treatment of information accompanying this application as outlined below:

e Block Diagram e Schematics e 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, J Signature Engineering Manager Ted Chong