Yealink T20P User manual

About This Guide
Thank you for choosing this Enterprise IP Phone which is especially designed for power
users in the office environment. It features fashion and sleek design, abundant
telephony applications, broad interoperability with the popular 3rd party VoIP products,
fulfilling the VoIP deployment needs from enterprise and ITSP.
In this User Guide, you will find everything you need to quickly use your new phone. Be
sure to verify with your system administrator that your network is prepared for
configuring your IP phone. As well, be sure to read the Packing List section in this guide
before you set up and use the phone.
Declaration of Conformity
Hereby, it’s declared that this phone is in conformity with the essential
requirements and other relevant provisions of the CE, FCC.
CE Mark Warning
This is a class B device, in a domestic environment; this product may cause radio
interference, in which case the user may be required to take adequate measures.
WEEE Warning
To avoid the potential effects on the environment and human health as
a result of the presence of hazardous substances in electrical and
electronic equipment, end users of electrical and electronic equipment
should understand the meaning of the crossed-out wheeled bin symbol.
Do not dispose of WEEE as unsorted municipal waste and have to collect
such WEEE separately.

Tables of Contents
Getting Started..................................................................................- 1 -
Packing List ............................................................................................................................... - 1 -
Assembling the Phone................................................................................................................ - 2 -
Configuration and Registration.................................................................................................. - 4 -
Configuring via Web Page ................................................................................................. - 4 -
Configuring via keypad...................................................................................................... - 5 -
Overview............................................................................................- 6 -
Keypad Instruction..................................................................................................................... - 6 -
LED Instruction.......................................................................................................................... - 7 -
Icon Instruction.......................................................................................................................... - 8 -
User Interface............................................................................................................................. - 9 -
Customizing Your Phone................................................................- 11 -
General Settings........................................................................................................................- 11 -
Phone Status......................................................................................................................- 11 -
Language...........................................................................................................................- 11 -
Time and Date.................................................................................................................. - 12 -
Keypad Lock.................................................................................................................... - 13 -
Audio Settings.......................................................................................................................... - 15 -
Volume............................................................................................................................. - 15 -
Ring Tones ....................................................................................................................... - 15 -
Codec Selection................................................................................................................ - 17 -
Contact Management ............................................................................................................... - 18 -
Edit/Add/Delete Contact.................................................................................................. - 18 -
Import/Export Contact list................................................................................................ - 20 -
Blacklist ........................................................................................................................... - 21 -
Other Settings........................................................................................................................... - 22 -
Key as Send...................................................................................................................... - 22 -
Hot Line ........................................................................................................................... - 23 -
Anonymous call ............................................................................................................... - 24 -
Auto Redial...................................................................................................................... - 25 -
AutoAnswer .................................................................................................................... - 26 -
Missed call log................................................................................................................. - 27 -
Logo Customization......................................................................................................... - 28 -
Programmable Key .......................................................................................................... - 29 -
Live Dialpad..................................................................................................................... - 30 -
Replace Rule.................................................................................................................... - 31 -

Dial Now.......................................................................................................................... - 32 -
Area Code ........................................................................................................................ - 33 -
Block Out......................................................................................................................... - 34 -
Feature Synchronisation................................................................................................... - 35 -
WatchDog......................................................................................................................... - 36 -
Action URL/URI.............................................................................................................. - 37 -
Using the Basic Call Functions......................................................- 40 -
Making a call............................................................................................................................ - 40 -
Call Devices..................................................................................................................... - 40 -
Call Methods.................................................................................................................... - 40 -
Password dial ................................................................................................................... - 42 -
Call Completion............................................................................................................... - 42 -
Answering a call....................................................................................................................... - 43 -
Answering an incoming call............................................................................................. - 43 -
Denying an incoming call ................................................................................................ - 43 -
DND................................................................................................................................. - 43 -
Call Forward .................................................................................................................... - 44 -
Intercom........................................................................................................................... - 45 -
During anActive Call .............................................................................................................. - 46 -
Mute................................................................................................................................. - 46 -
Call Hold.......................................................................................................................... - 46 -
Call Waiting ..................................................................................................................... - 46 -
Call Transfer..................................................................................................................... - 47 -
3-way Conference............................................................................................................ - 48 -
Network Conference........................................................................................................ - 48 -
Voicemail ......................................................................................................................... - 49 -
Using theAdvanced Phone Functions ..........................................- 52 -
Account Setting........................................................................................................................ - 52 -
TLS .................................................................................................................................. - 52 -
DNS-SRV......................................................................................................................... - 53 -
Network Setting ....................................................................................................................... - 54 -
PC Port Setting................................................................................................................. - 54 -
VLAN Setting.................................................................................................................. - 55 -
LLDP................................................................................................................................ - 56 -
HTTPS ............................................................................................................................. - 57 -
Maintenance Tasks................................................................................................................... - 58 -
Administrator Mode......................................................................................................... - 58 -
Administrator/User Password .......................................................................................... - 58 -
Reboot.............................................................................................................................. - 59 -
Reset to Factory ............................................................................................................... - 59 -
Firmware Update.............................................................................................................. - 60 -
Decryption........................................................................................................................ - 61 -

Zero-sp-touch................................................................................................................... - 62 -
System Log Export........................................................................................................... - 63 -
PCAP Trace Export.......................................................................................................... - 63 -
802.1X.............................................................................................................................. - 63 -
DSS keys Configuration........................................................................................................... - 64 -
BLF.................................................................................................................................. - 64 -
BLF List........................................................................................................................... - 65 -
Line.................................................................................................................................. - 65 -
Speed Dial........................................................................................................................ - 66 -
Intercom........................................................................................................................... - 66 -
URL Record..................................................................................................................... - 66 -
Shared Line...................................................................................................................... - 67 -
Conference....................................................................................................................... - 67 -
Forward............................................................................................................................ - 67 -
Transfer............................................................................................................................ - 68 -
Hold.................................................................................................................................. - 68 -
DND................................................................................................................................. - 68 -
Redial............................................................................................................................... - 68 -
Call Return....................................................................................................................... - 69 -
Pick Up............................................................................................................................. - 69 -
Call Park........................................................................................................................... - 69 -
Group Listening ............................................................................................................... - 70 -
Voice Mail........................................................................................................................ - 70 -
DTMF .............................................................................................................................. - 70 -
Public Hold ...................................................................................................................... - 70 -
Private Hold ..................................................................................................................... - 71 -
Group Pick up .................................................................................................................. - 71 -
Paging .............................................................................................................................. - 71 -
Record.............................................................................................................................. - 72 -
Prefix................................................................................................................................ - 72 -
Zero-sp-touch................................................................................................................... - 72 -
ACD................................................................................................................................. - 72 -
Local Group ..................................................................................................................... - 73 -
Tone Settings............................................................................................................................ - 73 -
Voice ........................................................................................................................................ - 74 -
Ring.......................................................................................................................................... - 75 -
Trouble Shooting.............................................................................- 77 -

Enterprise IP Phone Getting Started
- 1 -
Getting Started
Packing List
The following components are included in your package:
Enterprise IP Phone
Phone Stand
Power Adapter
Handset & Handset Cord

Enterprise IP Phone Getting Started
- 2 -
Ethernet Cable
Quick Installation Guide & Quick Reference
CD Content
Check this list before installation to ensure that you have received each item. If you are
missing any items, contact your IP phone reseller.
Assembling the Phone
This section introduce how to assemble the phone with the components in the packing
list：
Attach the stand;
Connect Handset and Headset;
Connect Network and Power.
1) Attach the Stand, as shown below:

Enterprise IP Phone Getting Started
- 3 -
Stand attached
2) Connect Handset and Headset, as shown below:
Note:
Headset is not provided in the packing list. Please contact your distributor for more
information.
3) Connect Network and Power
There are two ways for network and power source connections. You can either connect
the phone to the AC Power directly using the power adapter or to a PoE compliant
switch or hub. Your system administrator will advise you on which one to use.
Note:
1. If inline power is provided, do not install AC adapter. Make sure the Ethernet cable
and switch/hub are PoE compliant.

Enterprise IP Phone Getting Started
- 4 -
2. The Internet Port can be also connected to Hub/Switch/IP PBX or other internet
devices.
The phone can also share the network connection with other network devices such as
PC. Connect the phone’s PC port and computer’s Network Port together using an
Ethernet cable, shown as below:
Configuration and Registration
If you are administrator, you need to do some simple configuration to make the phone
work. If not, please contact with your internet administrator or service provider for
more details.
Configuring via Web Page
Press OK button on the keypad of the phone to enter the status page and find out the
IP address of IP phone. Enter it (for example http://192.168.3.28) into the address bar
of web browser. The default administrator’s login name and password are
admin/admin. The default user’s login name and password are user/user.
Note:
Please locate your PC in the same network segment of IP phone [phone].X) to
access the web configuration page. Please consult your system administrator for help.
Network Settings
Choose Network->Internet Port（WAN）.
DHCP: Under the default situation the phone attempts to contact a DHCP Server in
your network in order to obtain its valid network settings, e.g. IP address, sub mask,
gateway, DNS server, etc.
Static IP Address: If your phone cannot contact a DHCP Server for any reason, you
need to enter the network settings manually via Static IP Address. Please contact your
internet administrator for more details.
PPPoE: If you are using the xDSL Modem, you can connect your phone to the internet
via PPPoE mode. Please contact your ISP for the User Name and Password for internet
access.

Enterprise IP Phone Getting Started
- 5 -
Note:
Using the wrong network parameters may result in inaccessibility of your phone and
may also have an impact on your network performance. Please contact your network
administrator.
Account Settings
The phone attempts to register to the SIP server using the account data provided by the
automatic or manual initialization.
Choose Account, you will find the following parameters:
Field
Description
Register Status
It shows the register status of the phone.
Account Active
You can choose on/off to enable/disable the account respectively.
Label
The name showing on the LCD of current device.
Display Name
The local phone name showing on the other phone when calling.
Register Name
Register name provided by ISP.
User Name
User account information, provided by ISP.
Password
Account password provided by ISP.
SIP Server
SIP server address provided by ISP.
When all accounts register fail, phone will display "No Service" by default.
When the phone reboot, it will register automatically. If many phones register at the
same time, this will affect the server, the users can set the register power up time so
that the phone will random register automatically within the set time.
Setting the power up time via web interface:
Choose Network->Advanced-> Registration random, enter the time in the field.
Note:
Should the IP PBX (SIP registrar) require an authentication, you will be prompted to
enter the correct password. Make sure you are using the appropriate input method or
enter the password via the web user interface.
Configuring via keypad
Network Settings: Press MENU->Settings->Advanced, enter the password, and
choose Network->WAN Port/PC Port /VLAN/Web Type/802.1x Settings to enter the
internet relating configuration page.
Account Settings: Press MENU->Settings->Advanced, enter the password, and
choose Accounts->OK to configure the account settings.
You can refer to the above “Configuring via Web Page”for the parameter detail.

Enterprise IP Phone Using the Basic Phone Functions
- 6 -
Overview
Keypad Instruction
You can check the following list which introduces the IP phone’s keypad in details:
Power Indication LED
It will show the power status, it will be on if the phone is powered, off if the phone is not
powered，and blink when someone calls in or there is a call on mute.
Hot Keys
In different interfaces, different functions of the hot keys.
Line Keys
This buttons are used to active up to the two user accounts.
DTMF Keypad
Use the DTMF hard keys to enter numbers, letters and special characters. Depending on
the selected input mode, you can enter digits, lower / upper case or special characters.
Navigation Keys
Use the navigation keys to navigate in the display menus and confirm/cancel actions.

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Audio Device Control Keys
Use the audio device control keys to perform the following actions depending on your
phone type:
：Adjust the volume of the handset, headset, speaker and ring tone;
：Allows for hands-free communication during calls;
Press to switch to the Group Listening mode.
：Place and receive calls through an optionally connected headset;
：Mute audio transmission locally during calls;
Hard Feature Keys
：Allow users to access the voicemail directly;
：Forward the current call to the third party;
When the phone is idle, press to enter the forward configuration page.
：Press to enter the Dialed Calls interface and choose a record to dial out.
LED Instruction
Table 1 Line Keys
LED Status
Description
Steady green
The account is active
Blinking green
There is an incoming call to the account, or there is a call on hold
Off
The phone is in idle status whatever registered /unregistered
Table 2 Line Keys set to BLF
LED Status
Description
Steady green
The monitored account is in idle status
Fast blinking green
There is an incoming call to the monitored account
Slow blinking green
The monitored account is on a conversation

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Off
It is not active as BLF
Table 3 Power Indication LED
LED Status
Description
Steady green
Power on
Blinking green
There is incoming call to the device, or there is a call on mute
Off
Power off
Icon Instruction
The IP Phone displays different kinds of icons on its LCD, you can refer to the following
table for their meanings:
Icon
Description
Flashes when the internet is disconnected
Missed calls
Call in
Call out
Input Method: all letters and numbers
Input Method: numbers
Input Method: multi-lingual letters in lower case
Input Method: multi-lingual letters in upper case
Call mute
Call hold
Voicemail
Call forward
Auto answer
DND
Keypad Lock
In handset mode
In headset mode
In speaker mode

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User Interface
There are two ways to customize specific options on your phones:
1. Using keypad and display on the phone.
2. Using Web user interface in an Internet browser from your PC; please refer to
“Configuration and Registration”to get into the Web interface.
In many instances, it is possible to use both the user interfaces to operate the phone
and change settings; some, however, are only possible via a phone or web user
interface. Please refer to the following table for differences:
Phone Options
Phone UI
Web UI
Status
--IP
--MAC
--Firmware
--Network
--Phone
--Accounts
√
√
√
√
√
Call Features
--Forward
--Call Waiting
--DSS Keys
--Key as Send
--Hot Line
--Anonym Call
--Auto Redial
--DND
--ReDialTone
--Emergency
--BusyToneDelay
--Return code when refuse
--Return code when DND
--Dial Plan
--Tones
--Intercom
--Call Completion
√
√
√
√
√
√
√
√
√
√
√
Basic Phone Functions
--Language
--Time & Date
--Ring Tone
--Phone Volume
√
√
√
√
√
Advanced Phone Functions
--Accounts
√

Enterprise IP Phone Using the Basic Phone Functions
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--Network
--Keypad Lock
--Reset Factory
--Set AES Key
--Set admin PWD
--Voice
--Upgrade
√
√
√
√
√
√
Other Features
--Messages
--History
--Directory
√
√
√
√
Note:
1. The above table only indicates most of phone functions rather than all of them.
Please refer to the relating parts for more details.
The default administrator password is admin.

Enterprise IP Phone Using the Basic Phone Functions
- 11 -
Customizing Your Phone
General Settings
Phone Status
You can view the status of your phone using the Phone interface or the Web interface.
This option allows you to review:
IP;
MAC;
Firmware;
Network: MAC, WAN, LAN, Gateway, DNS, etc;
Phone: Model, Hardware, Firmware, Product ID and MAC;
Accounts: The 2 SIP accounts status;
To check the Phone Status via Phone interface:
1) Press OK button directly to check the IP.
2) Use the navigation keys to check the other information.
To view the Phone Status via Web interface:
Open the web browsers and input the IP Address http://WAN-ip-address; Enter the
account and password (default account and password are both “admin”), choose Status
directly to check the status.
Language
The default Phone interface language is English. The Web interface language depends
on your computer Operation System. It will automatically match the language with your
computer and browser.
It also supports French, German, Italian, Polish, Turkish, Portuguese, Spanish, etc. You
can change the language for the phone user interface and the web user interface
independently from each other.
Note:
All languages may not be available for selection. The available languages depend on the
language packs currently loaded to the IP phone. Please contact with your system
administrator for more information about loading language packs.

Enterprise IP Phone Using the Basic Phone Functions
- 12 -
To change the language via Phone interface：
1) Press MENU->Settings->Basic->Language.
2) Scroll through the list of available languages.
3) Press OK button when the desired language is highlighted. The language appears
on the graphic display will be changed to the one you choose.
4) Press MENU key to return to the previous screen.
Time and Date
The time and date appears on the idle screen of the IP phone. If the phone cannot
obtain a time and date from the call server, please contact your system administrator if
the time or date is incorrect. You can set the time manually or via the SNTP server
which is used to synchronize the time.
To change the Time and Date via the Phone interface:
1) Press MENU->Settings->Basic->Time & Date.
2) If SNTP is chosen, the phone will automatically get the time from the specific NTP
Server. Use the navigation keys to highlight the specific options and do the relating
changes. You can set the Time Zone, NTP Server1/Server2, and DST respectively.
3) If Manual is chosen, the time can be set manually. Use the navigation keys to
highlight the option and enter the specific date and time.
4) Press OK button, the time appears on the idle screen will be changed. Or press
MENU key to return to the previous screen.
To set the time format via the Phone interface:
1) Press MENU->Settings->Basic->Time & Date->Time & Date.
2) Use the Left/Right navigation keys to choose a preferred time format: 12 hour or
24 hour.
3) Press the OK button to save the changes and return to the previous screen.
To change the Daylight Saving Time Settings via the Web interface:
1) Choose Phone->Preference->Daylight Saving Time to do the relating changes.
2) Choose Enable option, then you can set the Daylight Saving Time.
3) Choose Automatic. There is a table named as AutoDST.xml has been saved in the

Enterprise IP Phone Using the Basic Phone Functions
- 13 -
configuration file, If the table includes daylight saving time of your time zone, it will
show the Fixed Type: By Date or By Week. And the daylight saving time is
unchangeable, unless to update the AutoDST.xml via auto provision.
Note:
By default the time zone is +8 China(Beijing), Daylight Saving Time is Automatic.
Keypad Lock
You can lock the keypad of your phone when you are temporarily not using it. This
function helps you to protect your phone from unauthorized use. You can lock the
following specific keys:
Menu Key: The Menu keys can not be used until unlocked. You can not access the
menu of the phone.
Function Keys: The hard function keys can not be used until unlocked. You can not
access the MESSAGE, HEADSET, TRAN, RD, Speaker, CONF, HOLD,
Navigation Keys, OK button, Mute button, Volume Adjustment button,
etc.
All Keys: All of the keys can not be used until unlocked. You can only use the
phone to answer the incoming calls.
Lock&Answer: You can only use the phone to answer the incoming calls（But can not
hung up the call by your party）. Or enter the menu pages to do some
configurations.

Enterprise IP Phone Using the Basic Phone Functions
- 14 -
To enable keypad lock via Phone interface:
1) Press MENU->Settings->Advanced, enter the password, and then press OK button.
2) Choose Keypad Lock->OK.
3) Use the navigation key to highlight the one you want to lock.
4) Press OK button to active the change, or MENU to return to the previous screen.
5) The icon will be displayed on the top right corner of the idle screen.
6) If you choose Lock&Answer, it will show the icon and AA on the user interface.
To unlock the phone via Phone interface:
1) Press MENU key, you are prompted for the password.
2) Enter the password, and then press OK button, the phone is unlocked.
3) If you choose Lock&Answer, you have to enter MENU->Settings->Advanced->
Keypad Lock interface to disable this option.
To enable keypad lock via Web interface:
Choose Phone->Preference-> Keyboard Lock to do the relating changes. Please refer to
the instructions above for the parameters’detail.
Note:
1. The default password for unlock is admin.
2. Users can make emergency calls when the phone is locked.

Enterprise IP Phone Using the Basic Phone Functions
- 15 -
Audio Settings
Volume
You can adjust the volume of handset/speaker/headset.
To adjust the volume when you are not in an active call:
1) Press MENU->Settings->Basic.
2) Scroll to Phone Volume, and press OK button, highlight the one you want to adjust
the volume, use the volume adjustment bar or navigation keys to adjust the
volume.
3) Press OK button to save the contrast change or MENU key to cancel.
4) And you can also press the Volume Adjustment Bar to adjust the ring volume when
the phone is in idle status.
To adjust the volume when you are in an active call:
When Handset/Headset/Hands-free mode is activated, press the Volume Adjustment
Bar to a comfortable level.
Note:
The volume can only be adjusted via Phone interface.
Ring Tones
You can adjust the type and volume of the ring tone.
To adjust the Ring Tone Type via Phone interface:
1) Press MENU->Settings->Basic.
2) Scroll to Ring Tone, and press OK button.
3) Use the navigation keys to highlight the specific one.
4) Press OK button to save the contrast change or MENU to cancel.
To adjust the volume via Phone interface:
1) Press MENU->Settings->Basic->OK.
2) Scroll to Phone Volume->Ring Volume, use the Volume Adjustment Bar or
navigation keys to adjust the volume.
3) Press OK button to save the contrast change or MENU key to cancel.
To change the Ring Tone Type via Web interface:
Choose Phone->Preference->Ring Type, highlight the specific one in the scroll-down
menu, click confirm button to update the change. You can also delete the specific one

Enterprise IP Phone Using the Basic Phone Functions
- 16 -
by clicking the Delete button.
Note:
The ring tone file of system can not be deleted.
To upload the new Ring Tone via Web interface:
1) Choose Phone->Preference->Upload Ringtone.
2) Click Browse button to choose the specific ring tone file.
3) Click Upload button to upload the file.
Note:
The ring tone file format must be in 16bits WAV format (via Ulaw Compression), 8K
sample rate (monophony). Blank or other special characters can not be included in the
file name.
To specify ring tones for a specific account via Web interface:
Choose Account->Basic->Ring Type option, and highlight the preferred one for the
chosen account in the scroll-down menu, then click confirm button to update the
change.