5. Getting Started

                 5.1. Package Content

            5.2. SIM Installation

a. Ensure phone is unplugged from power supply

b. Insert the nano SIM card per below reference picture. 

Note:- please do not plug in SIM card while the phone is connected power

            5.3. Stand bracket installation instruction

               a. Put the bottom side of the IP phone upside and press one-side joints of stand bracket into the lot, please refer the picture as below:

  a. Press the other side joints into the slot according to the direction of the arrow:

            **It is the right picture after fixing the stand bracket below:

                   5.4. Disassemble the stand bracket:

       a. Push the spring joint of stand and pull the stand according to the direction of the arrow. When the joints are pulled out of the slot, you can take off the stand bracket

                5.5. Connecting the handset and power 

                                          a. Connect the handset-to-handset cord

                                   b. Connect the other end of the handset cord to back of the phone, marked “handset” per picture below.

                              c. Connect the DC plug on the power adapter to the DC5V port on the phone and connect 

                                   d. The other end of the power adapter into an electrical power outlet

Illustration 1

          

        b. Press the other side joints into the slot according to the direction of the arrow

                                       

                

                5.7. Disassemble the stand bracket:

                5.8. Phone Initialization

                            After your phone is powered on, Enable the LTE

                                  1. Press Menu → LTE Setting, enable LTE feature

                               2. After enable LTE, press ↓ key, you can see Network service, Network type,

                            Signal strength and IMSI and signal bar on the top right-hand corner next to time stamp.

                 6. Call Feature.

                       6.1. Answer calls 

    

Function	Description
Answer by Handset	Pickup the handset and talk with the caller. if you want to hang up, just put back the handset. When you are talking with the handset and want to switch to speaker or headset mode, please press,  key or  key, and then put down the handset.
Answer by Speaker	Press  key and talk with callers by built-in micro-phone and speaker. If you want to hang up, please press,  key again. switch calling or talking to handset mode by lifting the handset under speaker mode. Press  key will switch calling or talking into headset mode.
Answer by Headset	Keep your micro phone connected with the RJ9 headset jack, when there is an incoming call, press  and talk with the caller. If you want to hang up, please press  again. pressing  can change calling or talking to speaker mode and lifting the handset switches to handset mode.

Function	Description
Using the Handset receiver	Pick up the handset, the LCD will show the current lines(user is able to switch from line 1 to line 6 by pressing the line key beside the LCD). Press soft key "Send" to dial the number. When you hear the tones of "du~~du~~" and the phone number you dialed is being displaying on the LCD, the phone at the side is being called should be ringing. If the called party answers the calling, the call is established, and the calling timer is started immediately.
Using the Speaker	Press  key and LCD will show the current lines(User is able to switch to line 1 to line 6 by press the line key beside LCD). Input the phone number and press soft key "Send" to dial the number. When caller hear the tones of "du~~du~~" and the phone number your dialed is being displayed in LCD, the phone at the side being called should be ringing. If the called party answers this calling, the call is established and the calling timer is started immediately.
Using the Headset	Press  key and LCD will show the current lines(User is able to switch to line 1 to line 6 by press the line key beside LCD). Input the phone number and press soft key "Send" to dial the number. When caller hear the tones of "du~~du~~" and the phone number your dialed is being displayed in LCD, the phone at the side being called should be ringing. If the called party answers this calling, the call is established and the calling timer is started immediately.
Dial from Phone book	Press  key to enter the menu and choose "Contact" option. Press "Enter" soft key and then find the contact person by navigation keys. When the certain contact person is highlighted, press "dial" or just pickup the handset to call this number. Pickup the handset, press "Contact" soft key, then find the contact person and press "Dial" soft key. Pickup the handset, press   and enter "Contact" then find the contact person and press "Dial" soft key.
Dial from Call history	Press  key to enter the menu and choose "History" option, then select one of the call history entry, and press "Dial" soft key or pickup the handset to call this number. Pickup the handset, press "History" soft key, then select one of the call history entry, and press "dial" soft key to call this number. Pickup the handset, press  and enter "Call History", then select one of the call history entry, and press "Dial" soft key to call this number.

           6.4. Multiple line dial-up

                TK920 supports up to 8 concurrent calls. If there is a new incoming call when you are talking on TK920, the new incoming call will be displayed on LCD and status indicator LED will be fast blinking. User can press soft key "Hold" then press “Answer” to receive the new incoming call.

         6.5. Call Hold

          The current calling will be hold by pressing soft key “Hold” or ,and the held call will be resumed after pressing soft key “Resume” or or the corresponding line key. Even on 3-way conference calling, the conference will be held after pressing “Hold” key and be resumed to 3-way conference after pressing “Hold” Key again. Remember the conversation is still on hold without being ended even if hung up under the status of hold.

        6.6. Call Transfer

             6.8.6. End

        a. While on the Conf call, the initiator press the ‘End’ key can end the conf call.

         6.8.7. Hang up the phone

    1. Softkey hang up

  -> While on calling, press the softkey “End Call” to hang up.

    2. Handset hang up

-> Put back the handset at handset mode, the current calling will be hung up.

    3. Speaker hang up

-> Press  key at speaker model, the current calling will be hung up.

    4. Headset Hang up

-> Press  key at headset model, the current calling will be hung up.

    5. Hang up one line call

-> Press the hook to hang up the current calling when 2 calls happened simultaneously.

        6.8.8. Voicemail

 TK920(W) has a  key for entering voicemail box and indicating new voicemail. Press  key to enter the menu to configure voicemail number if you have never configured it previously. Otherwise, the voicemail number will be called after pressing it. 

              7. Setup

                   7.1. Initial Setup

         1. When start on the phone, it turns to standby status in about 50 seconds.

        2. After boot-up finished, User can select the Language and time zone manually.

Language Selection	Time Zone Settings

      3. Next enable the LTE

      4. If the SIM card need input APN code, you can press Menu → LTE setting → APN setting, choose “Enable” custom APN, and press ↓button to input APN account info or you can log via local GUI to update the APN. 

                    7.2. Standby

                     7.3. Configuration

                                  Press the key   to enter the Main Menu :

                               

      Move the navigation key and press the softkey "Enter" or input the corresponding Number key select the item of Main Menu :
                                 

Number Key "1"	Enter "Status"
Number Key "2"	Enter "LTE settings"
Number Key "3"	Enter "Feature"
Number Key "4"	Enter "Directory"
Number Key "5"	Enter "History"
Number Key "6"	Enter "Message"
Number Key "7"	Enter "Settings"
Number Key "8"	Enter "Display"

        

                         

                 7.4. Status info

           You check the status info via LCD Display or Web.  And the basic status and details status will be optional displayed on LCD display

          Details Status——Network info. Production info and Account info in details.

         7.4.1. Basic Status

   The Basic Status provide IP address, MAC address and Firmware version.  There are two ways to check basic status.

a. Press the key  on standby.

b. Press the key  and select the “Status” of Main Menu.

c. Move the navigation key, the status display the Model, IP, MAC, Firmware, More 

          7.4.2. Details Status 

a. Select “More” and then press the softkey “Enter” to check details info and move the navigation key to check more.

                  

b. Press the softkey “Enter” to check status info, and “Back” to return the Basis Status page.

        7.4.3. Local Web Access

1. Plug in the Ethernet cable to LAN port on the device side.

2. Enter the 192.168.1.224 in the web browser

3. Input the username and password, the default user and password for Administrator is (admin, admin), for general user is (user, user), and then press “Enter”.

4. By default, the Status info will be displayed.

         8.  Phone Feature Details

This section covers details related various features supported by TK920.

           8.1.1. Call Forward

      “Call Forward” includes “Always Forward”, “Busy Forward”, “No Answer Forward”.

“Always Forward” has the highest priority, and “Busy Forward” has the same priority as “No Answer Forward”, that means once the function of “Always Forward” is activated, other call forward features will be unavailable.
    
    Any type of Call forward feature is activated, the Icon  will be indicated on the LCD Display. 

         8.1.2. Always Forward

         8.1.3. Busy Forward

                           

Item	Operation	Description
Busy	Press the key   or the softkey "Switch" to setup	Switch on or Switch off the feature. "Enable means the feature is enabled". "Disable means the feature is disabled".
Forward	The Number "*"key , and "#" are permitted to input.	Setup the target phone number which all incoming calls transferred to.
On Code	The Number key, "*" key, and "#" are permitted to input	The feature code to enable all incoming calls forward, the phone will send the feature code directly to open all incoming call forward.
Off Code	The Number key, "*" key, and "#" are permitted to input	The feature code to disable all the incoming calls forward, the phone will send the feature code to close all incoming calls forward directly.

                        

            8.1.4. No Answer Forward

 All incoming calls will be forwarded after time out once the feature of “No Answer Forward” is activated. Setup this feature as below, and please move the navigation key to check more:

                     

                           

                                                                 

Item	Operation	Description
No Answer	Press the key   or the softkey "Switch" to setup	Switch on or off the feature. "On" means the feature is activated "Off" means the feature is inactivated.
Forward to	The Number "*"key , and "#" are permitted to input.	Setup the target phone number which all incoming calls transferred to.
After Ring Time	Press the key   or the softkey "Switch" to setup	Setup timer for no answer status. All incoming calls will be forwarded after time out once call forward when no answer activated.
On Code	The Number key, "*" key, and "#" are permitted to input	The feature code to enable no answer call forward, the phone will send the feature code directly to open all incoming calls forward
Off Code	The Number key, "*" key, and "#" are permitted to input	The feature code to disable all incoming calls forward, the phone will send the feature code directly to close all

 

             8.1.5. Setup Call Forward Via Web 

                                       Set Call Forward via web: Phone→Features→Forward.

   

                           

Set Anonymous Call via web：Account→Basic→Select the Account→Anonymous Call.

Set Anonymous Call Rejection via web：Account→Basic→Select the Account→Anonymous Call Rejection.

      9.  Contacts

          The content of Directory includes local phone book and deny list. Enter Directory as follow,

           b. Press the navigation key 

           

                  c. Press the menu key , and then select “Contacts” Configure the “Contacts” via Web：

Item	Operation	Description
Name	Input by number key , "*" or "#", change input-method via pressing the soft key "abc"	It is used to identify different phone number. any reduplicated names are not permitted in the contacts.
Office	Input by number key , "*" or "#", change input-method via pressing the soft key "abc"	You can save three numbers at most.while calling a contact person in contacts, the phone will redirect to the page that to select one number to dial when multiple numbers are saved for one contact record.
Mobile	Input by number key , "*" or "#", change input-method via pressing the soft key "abc"	You can save three numbers at most.while calling a contact person in contacts, the phone will redirect to the page that to select one number to dial when multiple numbers are saved for one contact record.
Ring	Press the key   or the soft key "Switch" to modify the account ID.	It's used to bundle each item with the corresponding ringtone, and the optional value is "Auto" or "Ringtone 1" to "Ringtone 10". "Auto" means the default ringtone will be played if new incoming call happened, otherwise the selected ringtone will be played.

                       Add new contact via web Contacts→ Contacts→Input messages→Add→Save.

        9.4. Edit the contact

           User must re-edit the contact item while updating one item of local phonebook.

                  Path to edit the contact on the phone：Press →Contacts→Local Contacts→All contacts→ Select the item to edit→Option→Edit→OK.

                      

                 Edit the contact item via Web: Contacts→ Contacts→click on the item to edit→modify messages Click “Edit” →Click “Save”.

           9.5. Delete the contact

                     Path to delete the contact on the phone：Press →Contacts→Local Contacts→All contacts→Select the item to delete→Option→Delete→ OK→OK. 

P                                        press the soft key “Cancel” at the Warning UI to stop deleting.

                                         Delete the contact item via web: Contacts→ Contacts→Select the item to delete Click on “Delete” →Click on “Save”.

                

           9.6. Move to deny list

P                            Press the soft key “Cancel” at the Warning UI to stop this operation.

               Move the contact item to blacklist via web ：Contacts→ Contacts→Select the item to move to blacklist→Click on “Move to black List” →Click on “Save” 

         9.7. Deny List

  The purpose of blacklist’s feature is to block the phone number inside blacklist to call the host phone number, but it’s available for the hosted phone number to call any phone number in the deny list.

  The most operation of deny list is the same as local phonebook except for the feature “Move to Contacts”, it means moving an item of blacklist to local phonebook to resume the  phone number to dial the host phone number normally.

           

         9.8. Remote phonebook

             1. Remote URL: Set a remote phonebook download path. Support the TFTP, FTP, HTTP and HTTPs server.

           2. Display name: Set a display name on the phone.

           3. Search Remote Phonebook name: Select “Yes” or “No” to enable or disable search remote phonebook name.

                   1. Press the key 

                   2. Press the key , then select “History”

       10.4. Add to Contact

              1. Enter “Call History ”→Select the target item→Option→add to Contact Press the key or soft key “Confirm”.

              At this moment an “edit” page will be popped up.

             Please move the navigation key to check more

         2. Modify the contact’s name, phone number and ringtone.

         3. Press the key or soft key “Saved” to save the modification, press the key or soft key “Cancel “to Cancel the modification.

            11.Voice Mail

User will benefit from the feature of voicemail when they are not available to answer an incoming call or missed some incoming calls. However, this feature must be supported by Server. Voicemail must be set up before using it.

Set the voicemail via Web: Account→Basic→Select an account to configure Voice Mail.

Sometimes the voicemail push can’t be reached in time, because the configuration problem with Server, you must configure some related parameter via Web to make the phone automatically send its request to Server for getting voicemail info.

Set “Subscribe for MWI” via web： Account→Advanced→Subscribe for MWI.

Set “MWI Subscription Period(secs)” via web：Account→Advanced→MWI Subscription Period(secs).

           11.1. Set Voice Mail

                  There are 3 different methods to set up the voicemail,

                   1. Press the key  after factory set

                   2. Press the key  for a while

                   3. Press the key →Select “Message ”→Setup Voicemail

                                 

        

           11.2. View Voice Mail

                                     User is able to check voicemail in below ways:

                          1. Setup voicemail number Press the key 

                          2. Press the key →Select “Message”→“View Voicemail”

         12.2. Language

   TK920(W)supports multiple language, to modify the language, please press the key →Setting Basic setting→Language→Select the target language and press the soft key “Save”.

          

    Set language via web：There is a drop-down box at the top left corner of webpage，choice one kind of language and click, the language will take effect immediately.

                       

         12.3. Time &Date 

Time & Date will be displayed at the standby page of TK920(W)，and this info will be related with all process of IP phone. “Time & Date” can be gained by NTP Server automatically or set manually. 

         12.4. NTP Setting

    Path to set on the phone：Press →Settings→Basic Settings→Time & Date→NTP Settings.

    Please move the navigation key to check more:

              

Item	Operation	Description
Time Zone	Press the key . or soft key “Switch” to modify it.	Select the correct Time Zone for the IP phone.
NTP server	Key in the IP address of domain name by the number keys,” *”,” #”	Specify the NTP Server
Secondary NTP server	Key in the IP address of domain name by the number keys,” *”,” #”	Specify the standby NTP Server
Day light-saving time	Press the key . or soft key “Switch” to modify it.	Optional: “Off”, “Auto” or “Manual”. And “Manual” mean user must set this via web.

   Set NTP via Web：Phone→Preference.

             

Item	Operation	Description
Time Zone	Click drop-down box to select	Set a time zone matches condition
Primary NTP server	Manual input	The primary NTP server that provide time and date
Secondary NTP server	Manual input	The secondary NTP server that provide time and date
Update Interval(Secs)	Manual input	The interval that the phone gains time and date from NTP server
Daylight	Click drop-down box to select	A switch to control the status that whether to enable the daylight or not
Fixed Type	Radio Content	Daylight fixed type, only the specified items are configurable
Start Month	Click drop-down box to select	The month that the daylight rule begins taking effect
Start Date	Manual input	The day that the daylight rule begins taking effect
Start Hour of Day	Manual input	The hour of day that the daylight rule begins taking effect
Start Day of Week	Click drop-down box to select	The day of week that the daylight rule begins taking effect
Start Week of Month	Click drop-down box to select	The week of month that the daylight rule begins taking effect
Stop Month	Click drop-down box to select	The month that the daylight rule stops taking effect
Stop Date	Manual input	The day that the daylight rule stops taking effect
Stop Hour of Day	Manual input	The hour of day that the daylight rule stops taking effect
Stop Day of Week	Click drop-down box to select	The day of week that the daylight rule stops taking effect
Stop Week of Month	Click drop-down box to select	The week of month that the daylight rule stops taking effect
Offset(minutes)	Manual input	The offset time that daylight rule takes effect

            12.5. Manual Settings

          Path to set on the phone：Press →Settings→Basic Settings→Time & Date Manual Settings.

        Please move the navigation key to check more:

                

        Set the Time & Date manually via web：Phone→Preference.

     

         12.6. Time&Date Format

          12.8. Headset Memory Mode 

      Headset memory mode can be used to control the default device to make or answer calls. This function is disabled by default, which means the phone will communicate with others by hand-free when pre-dial or making calls from history or contacts, and so is the situation that pressing “Answer” soft key to     accept an incoming call. Once this function is enabled, the phone will make or answer calls by headset. Long press can change the status of the “Headset Memory Mode”.

        12.9. Phone Unlock PIN

Phone Unlock PIN: Unlock the phone locked conditions.

please move the navigation key to check more and press the cancel key to back the function,

         

        

Item	Operation	Description
Current PIN	Manual Input	Input the phone current PIN
New PIN	Manual Input	Set the new PIN
Confirm PIN	Manual Input	Confirm the new PIN

          13.  Advanced Settings

       13.1. Account

          path to set the account info on phone：Press →Settings→Advanced Settings→Input password→Accounts.

Configure account via web：Account→Basic

          13.2. Set Password

       13.3. Network

      Path to set network parameters on phone: Press →Settings→Advanced Settings→Input the password→Network.

     please move the navigation key to check more:
                       

IEEE 802.1X authentication is an IEEE standard for Port-based Network Access Control(PNAC), part of the IEEE 802.1 group of networking protocols. It offers an authentication mechanism for devices to connect to a LAN or WLAN.

It supports protocol EAP-MD5, EAP-TLS, EAP-PEAP/MSCHAPv2, EAP-TTLS/EAP-MSCHAPv2,EAP-PEAP/GTC and EAP-TTLS/EAP-GTC for 802.1X authentication.

Set the 802.1X via the webpage: Network →Advanced→802.1X

            

                13.13. Keypad Lock

     It support enable or disable the keypad lock feature, if enable, the default password is 123:

     Please move the navigation key to check more

             

    Keypad lock via webpage: phone→Phone lock

          

   1.  Keypad Lock Enable: select “Yes” or “No” to enable or disable keypad lock

   2.  Keypad Lock Type: Menu key/Function keys/All keys/Answer call only.

   3.  Phone Unlock PIN(0~15 Digit):set the phone unlock PIN. Range: 0~15 digit.

  4.  Phone Lock Time Out(0~3600s): set the phone lock time out. Range: 0~3600s

  5.  Emergency :set emergency number. Default to 110.120.119 and 911.

                 13.14. Reboot

     After the restart, the phone will back to standby interface.

           

     Reboot via webpage:Phone→Upgrade→Reboot

           

        

                   13.15. Reset to factory 

There are 9 different contrast grades for options, press the soft key “Switch” or the key. for modification,8 is the default value.

                 

                 13.8. Backlight

 Backlight is the brightness of LCD, also it has been defined as 9 different grades. The number “9” means the lightest.
  
              

              14.  Advanced Feature

                14.1. Codecs

      TK920(W) support multiple codecs, users can select the codes via Web.

         

      means to enable the item of “Disabled Codes”；

         means to disable the item of “Enabled Codes”；

       Click the button  or  to sort all enabled codes, the top item has the highest priority.

       Note：Multiple different items of G726，iLBC should not activated simultaneously.

                  14.2. PCAP Capture

                          It would record the phone current info.

                          Via webpage:phone→Debug→PCAP Feature

          

     

     Click the button “Start” to start the capture and click the button “Stop” to end the capture. Then click the button “export” to download the capture file.

                      14.3. Upgrade firmware

   Via webpage:phone→ Upgrade→ Upgrade Firmware

       

Before upgrading the firmware of phone, users are suggested to check the version of current firmware. Click the button “Choose file” to select the target local file and click “Upgrade” to process upgrading, this will cost a couple of minutes. And after reboot, the phone will be upgraded successfully.
 

                       14.4. Auto Provision

 User is able to configure the phone to upgrade automatically.

       

                     14.5. Export & Import configuration file

If user wants to set the same configuration on multiple phones, there is an easy way that export the configuration file from one phone and then import this file into other phones. This operation can be completed via Web only.

               

                    14.6. Export configuration file 

There is two ways to export the configuration files,

 ● Don’t check the “Export User Data” and click “Export” directly, it will export the template of the configuration file;

 ● Check the “Export User Data” and then click “Export”, it will export a configuration file that carries with user’s configured data.

To modify the exported configuration file, you should to decompress it until you get a file names as configuration.

               

    The content of configuration file listed as below,

               

                   14.7. Import configuration file 

Click the button “Choose file” to select the target file for importing, and then click the button “Import”. The phone will be rebooted a couple of minutes later and import successfully.

Note: If some part of the configuration file has been modified manually, it must be re-compressed as the format of “tar.gz” in Linux

                   14.8. Export System log

When the phone doesn’t work well, System log is the best assistant tools for troubleshooting, all operation details has been recorded. This operation is available via Web only. 

                

                       14.9. Dial plan

The customized Dial Plan are available, for example, the rule of replacement, Instant Calling, Area code, Restriction of Outbound.

Before customizing the dial plan, user must learn the basic grammar as below,

   Note：Any operations (add, modify or delete) on the current dial plan will be not effective until click “Save”.

                  14.10. Replace Rule

    Dial plan “Replace Rule” means to replace a batch of complicated character string by some simple characters, to make a speed dial.

         

                14.11. Dial-now

          Dial plan “Dial-now” permits the corresponding phone to be dialed instantly without pressing the soft key “Dial”, once the input has been matched. It works like a hotline.

           

              14.12. Area Code

Dial plan “Area Code” has been defined to identify each different area. To call a phone number of other areas, user must add the area code to be in front of the phone number. For convenience, area code has been recommended to be configured while frequently dialing to that type of phone number.

         

              14.13. Block Out 

Dial plan “Block out” is used to prohibit the phone number outgoing call from some accounts.

        

       15.  FAQ

       15.1. Configure the LTE on the phone

  1. Press Menu → LTE Setting, enable LTE feature

  2. After enable LTE, press ↓ key, you can see Network service, Network type, Signal strength and IMSI.

        15.2. Configure the account on the LTE network

Under LTE network, you can set the phone accounts through auto provision or phone LCD.

 Auto provision configuration account:

LCD menu configuration account.

Press Menu→ Settings→ Advanced settings (default password: admin)→ Accounts, input the account info.

       15.3. How to factory reset

There are 3 methods for factory reset：

    1.    Factory reset via phone：
 a)     Press the key

b)     Select “Settings”, then press the soft key “Enter”

c)     Select “Advanced Settings”，then press the soft key“Enter”

d)     Input the access password, then press the soft key“Enter”

e)     Select “Reset to factory”，then press the soft key“Enter”

        15.4. Upgrade the firmware in safe mode

If the phone can’t be started successfully, user is able to upgrade the firmware on post mode,

a)     Setup a TFTP Server and set the PC’s IP address as “192.168.1.200”

b)     Copy the kernel file we supplied to the root menu of TFTP Server

c)     Ensure the TFTP Server and phone are connected to the same network switch and both reachable

d)     Long Press the key “*” and “1” to upgrade the kernel file, and then plug in power until upgrading information displayed on LCD

e)     The phone will start downloading file from TFTP server

f)      After downloading completed, the phone will be automatically upgraded

g)     After upgrading completed, the phone will be started with the factory default settings

         15.5. How to make IP Peer to Peer call

1.   Press it in dialing status

2.     To make a IP peer to peer call

Using press“*”to choose “.” that in the IP address. For example, to dial “192.168.1.100”, just need input “192”,“*”,“168”, “*”,“1”, “*”,”100”.

3.   Disable the IP call feature

Via webpage modify the make IP call feature:

Phone→Feature →Accept SIP Trust Server Only, press “Enable”.

      

        16.  Basic Troubleshooting

              16.1. The phone is failed to register to SIP server

  1.     First of all, check the IP address. If the LAN port is DHCP, please ensure the DHCP server has been enabled.

  2.     Check the network gateway

  3.     Check the DNS

  4.     Make sure the input account matched the one provided by Service Provider

  5.     Make sure SIP Server has been enabled already

  6.     Make sure the Port of SIP Server, it’s 5060 by default

 

            16.2. The phone is failed to gain IP address

1.     Make sure the network cable has been plugged into the LAN port

2.     Make sure the network cable or port of network switch are working fine,

3.     Make sure the DHCP server has been enabled, and there are available IP address

4.     Try to set the LAN port as Statics IP

          16.3. Only one party can hear from another on calling

1.     Try to make a IP peer to peer call, to make sure the mic and speaker are working fine

2.     Enable STUN via Web

3.     Set the address of STUN Server, for example stun.sipgate.com

4.     Present this operation above and the phone will be reboot

5.     Try to make a normal call again

         17.  Word Abbreviation

             DND：Do Not Disturb

            CFWD：Call Forward

           Bxfer：Blind Transfer

                 Conf：Conference

Num：Number

SIP：Session Initiate Protocol

RTP：Real-time Transport Protocol

SDP：Session Description Protocol

VPN：Virtual Private Network

VLAN：Virtual Local Area Network

QoS：Quality of Service

Syslog：System log

UDP：User Data Protocol

TCP：Transmission Control Protocol

TLS：Transport Layer Security Protocol

BLF：Busy Lamp Field

DNS：Domain Name System

SRTP：Secure Real-time Transport Protocol

NTP：Network Time Protocol

VAD：Voice Activity Detection

      CNG：Comfort Noise Generator