Yealink SIP- T28P Quick Reference

Basic Phone Functions
You can make a call by pressing the Speaker/Headset button or picking up the handset.
Dial number directly: Dial the number directly, press Send softkey/button
Dial from Call History: Press History softkey, use the navigation key to highlight the specific one,
press Send softkey /button to call out
Dial from Directory: Press Directory softkey, scroll to Contact List, press Enter softkey, use the
navigation key to highlight the specific one, press Send softkey/button to call out
Re-dial: Press RD button to dial out the last call you made
During the conversation, you can alternate between Headset, Handset and Speakerphone by pressing
the corresponding buttons or picking up the handset.
Answering a Call
Answering an incoming call in the following ways:
If you are on another call, press the answer softkey; if not, lift the handset or press the Speaker
button/ Answer softkey to answer using the speakerphone, or press the headset button to answer
using the headset.
You can also press the Reject sofkey to deny the incoming call
Muting a Call
Press Mute button during the conversation, press it again to get the microphone return to
normal conversation.
Volume Adjustment
During the call, you can press the volume adjustment bars to adjust the volume
Putting a Call on Hold
Press the Hold button or Hold softkey to put your active call on hold
If there is only one call on hold, press the Resume softkey or Hold button to retrieve the call
If there are more than one call on hold, press the line button, press the Up/Down button to
highlight the call, press the Resume softkey or Hold button to retrieve the call
Speed Dial
Speed dial numbers must already be set into the phone, please check the relating content in the
user manual for more details
Press the DSS Keys which has been set as Speed Dial button, the entry in the speed dial list
assigned in advance will be dialed automatically
Voicemail
The presence of new Voice Mail messages is indicated in the idle screen, press Voicemail softkey,
enter the desired password to get the voicemail in the server
Volume
Adjustment Bar
Mute
Redial
Table 1 Programmable Keys as Call /Line Appearance Buttons
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 apperance buttons
Table 2 Account Button LEDs
LED Status Description
Steady green The account is active
Blinking green There is an incoming call to the account
Off The phone in idle status whether registered/unregistered
Table 3 Power Indication LED
LED Status Description
Steady green Power on
Off Power off

Yealink SIP- T28P Specifications

General

Expansion module support	Yes
Ethernet LAN (RJ-45) ports	2
Keypad number of keys	48
Voice codecs	G.711, G.722, G.723.1, G.726
Handset type	Wired handset
Product type	IP Phone
Product color	Black
Touchscreen	-
Display resolution	320 x 160 pixels
Lines quantity	- lines
Phonebook capacity	- entries
Number of VoIP accounts	6
Bluetooth	No
Security algorithms	HTTPS, SSL/TLS
AC adapter input voltage	100 - 240 V
AC adapter output voltage	5 V
Power consumption (typical)	2.6 W
Operating relative humidity (H-H)	10 - 95 %
Compliance industry standards	IEEE 802.3af
Number of handles included	1 pc(s)

Weight and Dimensions

Depth	204 mm
Width	273 mm
Height	42 mm
Weight	1050 g