Yealink Yealink SIP-T28P 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 Parts List and Regulatory Notices
sections 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...................................................................................................... - 6 -
Overview ..........................................................................................- 7 -
Keypad Instruction..................................................................................................................... - 7 -
LED Instruction.......................................................................................................................... - 9 -
Icon Instruction .......................................................................................................................... - 9 -
User Interface........................................................................................................................... - 10 -
Customizing Your Phone...............................................................- 12 -
General Settings ....................................................................................................................... - 12 -
Phone Status..................................................................................................................... - 12 -
Language.......................................................................................................................... - 12 -
Time and Date .................................................................................................................. - 13 -
Keypad Lock .................................................................................................................... - 14 -
Audio Settings.......................................................................................................................... - 15 -
Volume ............................................................................................................................. - 15 -
Ring Tones ....................................................................................................................... - 16 -
Codec Selection................................................................................................................ - 17 -
Contact Management ............................................................................................................... - 18 -
Edit/Add/Delete Contact .................................................................................................. - 18 -
Import/Export Contact list................................................................................................ - 19 -
Other Settings........................................................................................................................... - 20 -
Logo Customization......................................................................................................... - 20 -
Dial Plan........................................................................................................................... - 20 -
Dial Now.......................................................................................................................... - 21 -
Block Out ......................................................................................................................... - 22 -
Using the Basic Call Functions.....................................................- 23 -
Making a call............................................................................................................................ - 23 -
Call Devices ..................................................................................................................... - 23 -
Call Methods.................................................................................................................... - 23 -
Answering a call....................................................................................................................... - 23 -
Answering an incoming call............................................................................................. - 23 -

Denying an incoming call ................................................................................................ - 24 -
DND................................................................................................................................. - 24 -
Call Forward .................................................................................................................... - 24 -
During an Active Call .............................................................................................................. - 25 -
Mute ................................................................................................................................. - 25 -
Call Hold.......................................................................................................................... - 25 -
Call Waiting ..................................................................................................................... - 26 -
Call Transfer..................................................................................................................... - 26 -
3-way Conference ............................................................................................................ - 27 -
Message.................................................................................................................................... - 27 -
Voicemail ......................................................................................................................... - 27 -
SMS.................................................................................................................................. - 28 -
Using the Advanced Phone Functions..........................................- 30 -
Account Setting........................................................................................................................ - 30 -
Network Setting ....................................................................................................................... - 31 -
Maintenance Tasks ................................................................................................................... - 32 -
Administrator Mode......................................................................................................... - 32 -
Administrator/User Password .......................................................................................... - 32 -
Reboot .............................................................................................................................. - 33 -
Reset to Factory ............................................................................................................... - 33 -
Firmware Update.............................................................................................................. - 34 -
System Log Export........................................................................................................... - 35 -
Programmable Key Configuration ........................................................................................... - 35 -
SIP Trunk ......................................................................................................................... - 35 -
BLF .................................................................................................................................. - 36 -
Intercom ........................................................................................................................... - 36 -
Direct Pickup.................................................................................................................... - 37 -
Group Pickup ................................................................................................................... - 37 -
Conference ....................................................................................................................... - 37 -
Speed Dial........................................................................................................................ - 38 -
Hold.................................................................................................................................. - 38 -
Transfer ............................................................................................................................ - 38 -
Call Return ....................................................................................................................... - 38 -
Voicemail ......................................................................................................................... - 39 -
Group Listening ............................................................................................................... - 39 -
Custom ............................................................................................................................. - 39 -
Tone Settings............................................................................................................................ - 40 -
Trouble Shooting ...........................................................................- 41 -

Enterprise IP Phone Getting Started
- 1 -
Getting Started
Packing List
The following components are included in your package:
zEnterprise IP Phone
zPhone Stand
zPower Adapter

Enterprise IP Phone Getting Started
- 2 -
zHandset & Handset Core
zEthernet Cable
zQuick Installation Guide & Quick Reference
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：
zAttach the stand;
zConnect Handset and Headset;
zConnect Network and Power.

Enterprise IP Phone Getting Started
- 3 -
1) Attach the Stand, as shown below:
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.

Enterprise IP Phone Getting Started
- 4 -
Note:
1. If inline power is provided, do not install AC adapter. Make sure the Ethernet cable
and switch/hub is PoE compliant.
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 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://192.168.3.35) into the address bar
of web browser. The default login name and password are admin/admin.
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.

Enterprise IP Phone Getting Started
- 5 -
Network Settings
Choose Network->Internet Port.
DHCP: By default 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.
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/registrar data
provided by the automatic or manual initialization.
Choose Account, you will find the following parameters:
Field Description
Register Status It shows the resister status of the phone.
Line Active You can choose on/off to enable/disable the account respectively.
Label It is shown on the LCD for users to identify the account.
Display Name It is shown as Caller ID when making a phone call.
Register Name It is authenticated ID for authentication, provided by ISP.
Account It is account for register, provided by ISP.
Password It is provided by ISP for registration.
SIP Proxy Server for registration, provided by ISP.
When you have finished the Network and Account Setting configuration, the Register
Status Icons will show in the idle screen:
Registered successfully
Register failed
Registering
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.

Enterprise IP Phone Getting Started
- 6 -
Configuring via keypad
Network Settings: Press Menu->Settings->Advanced Setting->Network->WAN Port
Option/LAN Port Option/VLAN Option to enter the internet relating configuration page.
Account Settings: Press Menu->Settings->Advanced Setting->Accounts->Enter to
configure the account settings.
You can refer to the above “Configuring via Web Page” for the parameter details.

Enterprise IP Phone Overview
- 7 -
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.
Context-sensitive Softkeys
The screen will display labels for these keys, to identify their context-sensitive
functions.
Account Buttons
These buttons are used to active up to the six user accounts.
Programmable Keys:

Enterprise IP Phone Overview
- 8 -
These keys are used for various functionalities such as call /Line appearance Button,
Speed dial, Intercom, Pickup, Hold, Transfer, etc. If not stated the adjacent LED will
light when the assigned functionality is turned on.
Dial Pad
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 and cancel
actions.
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;
：Place and receive calls through an optionally connected headset. The LED will
be on when the phone is in Headset mode;
：Mute audio transmission locally during calls;
Hard Feature Keys
：Allow users to access the voicemail and SMS directly;
：Enable setup of a local 3-way conference;
：Place a call on hold or resume it;
：Transfer current call to third party;
：Dial most recently dialed number;

Enterprise IP Phone Overview
- 9 -
LED Instruction
Table 1 Call /Line Appearance Button LEDs for BLF
LED Status Description
Steady green Call/line appearance is in idle status
Slow blinking red Call/line appearance is ringing
Steady red Call/line appearance is active
Fast blinking red Call/line appearance is not available
Off It is not active as call/line appearance
Table 2 Account Button LEDs
LED Status Description
Steady gree The account is active
Blinking green There is an incoming call to the account
off The phone is in idle status whether registered
/unregistered
Table 3 Power Indication LED
LED Status Description
Steady green Power on
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
Account register failed
Account registering
Account register successful
Missed calls
Call in
Call out
Input Method: all letters and numbers
Input Method: numbers

Enterprise IP Phone Overview
- 10 -
Input Method: letters in lower case
Input Method: letters in upper case
Call mute
Call hold
Voicemail
SMS
Call forward
DND(Do not Disturb)
Auto answer
In handset mode
In headset mode
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 Address
--MAC Address
--Firmware
--Network
--Phone
--Accounts
√√
Call Features
--Forward
--Call Waiting
--Auto Answer
--DSS Keys
--“#” Key As Send
--Dial Plan
√
√
√
√
√
√

Enterprise IP Phone Overview
- 11 -
--Dial Tone
Basic Phone Functions
--Language
--Time
--Ring Tone
--Phone Volume
--Lock
--Logo Customization
√
√
√
√
√
√
√
√
√
Advanced Phone Functions
--Accounts
--Networks
--Voice
--Codecs
--Echo Cancellation etc
--Set Admin Password
--Reset To Factory
--Update
√
√
√
√
√
Other Features
--Message
--History
--Directory/Contact List
--Black List
√
√
√
√
Note:
The above table only indicates most of phone functions rather than all of them. Please
refer to the relating parts for more details.
User and Administrator Mode
Your phone can be used in user or administrator mode. Administrator mode is the
default setting with full configuration rights. The default administrator password is
admin.

Enterprise IP Phone Customizing Your Phone
- 12 -
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:
zNetwork status: IP Address, Mac Address, WAN/LAN, Gateway and DNS;
zPhone status: Product Name, Hardware ,Firmware, Product ID and Mac;
zAccounts: the 6 SIP accounts status;
zFirmware version;
To check the Phone Status via Phone interface:
1) Press OK button directly or Menu softkey, choose the Status option.
2) Use the navigation keys to scroll through the list and check the specific one.
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 PhonAudio Settingse interface language is English. The Web interface
language will depend on your computer Operation System. It will automatically match
the language with your computer.
It also supports Simplified Chinese, Traditional Chinese, French, German, Japanese,
Portuguese, Spanish, Italian, Russian, Hebrew, 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 Customizing Your Phone
- 13 -
To change the language via Phone interface：
1) Press Menu->Settings->Basic Setting->Language.
2) Scroll through the list of available languages.
3) Press the Save softkey when the desired language is highlighted. The language
appears on the graphic display will be changed to the one you chose.
4) Press Back softkey 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 can not
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 Setting->Time.
2) If SNTP Settings is chosen,the phone will automatically get the time from the
specific NTP Server. Use the navigation keys to highlight the specific option and the
relating changes. You can set the Time Zone, NTP Server1/Server2, Daylight
Saving respectively.
3) If Manual Setting 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 Save softkey, the time appears on the idle screen will be changed. Press Cancel
softkey to return to the pevious menu.

Enterprise IP Phone Customizing Your Phone
- 14 -
To change the Time and Date via the Web interface:
Choose Phone->Preference to do the relating changes. You can also change the Update
Interval which specifies the time frequency that the phone refreshes the time
automatically. Please refer to the instruction above for the parameters detail.
Note:
By default the time zone is +8 China, Philippines, Malaysia, Daylight Saving Time is
disabled.
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 Keys: The Menu softkeys 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, CONF, HOLD, MUTE, TRAN, RD Keys.
Talk Call Only: All of the keys can not be used until unlocked. You can only use the
phone to answer the incoming calls.
To enable keypad lock via Phone interface:
1) Press Menu->Settings->Advance setting, enter the password, and then press
Confirm softkey.
2) Press Phone Setting->Lock.
3) Use the navigation key to highlight the one you want to lock.
4) Press Save softkey to active the change, and Back softkey to return to the previous
screen.
5) The icon will be displayed on the top right corner of the idle screen.
To unlock the phone via Phone interface
1) Press Menu softkey, you are prompted for the password.
2) Enter the password, then press Confirm softkey, the phone is unlocked.
3) The icon will be disappearing from the idle screen.

Enterprise IP Phone Customizing Your Phone
- 15 -
To enable keypad lock via Web interface:
Choose Phone->Preference to do the relating changes. Please refer to the instruction
above for the parameters’ detail.
Note:
The default password for unlock is admin.
Audio Settings
Volume
You can adjust the volume of handset/speaker/headset.
To adjust the volume when you are not on an active call:
1) Press Menu->Settings->Basic Settings.
2) Scroll to Phone Volume, and press Enter softkey, highlight the one you want to
adjust the volume, use the Volume Adjustment Bar or navigation keys to adjust the
volume.
3) Press OK softkey to save the contrast change or Back softkey to cancel.
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.

Enterprise IP Phone Customizing Your Phone
- 16 -
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 Setting.
2) Scroll to Ring Tone, and press Enter softkey.
3) Use the navigation keys to highlight the specific one.
4) Press OK softkey to save the contrast change or Back softkey to cancel.
To adjust the volume via Phone interface:
1) Press Menu->Settings->Basic Setting
.
2) Scroll to Phone Volume->Ring Volume, use the Volume Adjustment Bar or
navigation keys to adjust the volume.
3) Press OK softkey to save the contrast change or Back softkey to cancel.
You can also adjust the ring tone volume by the following way:
When the phone is in idle status, press the Volume Adjustment Bar to a comfortable
level.
To change the Ring Tone Type via Web interface:
Choose Phone->Preference->Ring Tone, highlight the specific one in the scroll-down
menu, choose confirm button to update the change. You can also delete the specific one
by choose Delete button.