Yealink SIP- T28P User Manual

Enterprise IP Phone Trouble Shooting
How to refuse incoming calls during a call?
You can turn off the function of call waiting, and then our phone will refuse all the
incoming calls when you are in a conversation.
How to send SMS?
You could edit the SMS in the Menu-> Messages->Text Messages.
Note:
Make sure that the SIP server you have registered supports SMS function.
How to update the firmware?
1) Enter the webpage of your phone, go to Upgrade, then you can find the
option ”Select and Upgrade Firmware” at the bottom of the page.
2) Select the file to update, and then click the Upgrade button.
Note:
Make sure the firmware you choose is provided by your service provider, or the device
will probably crash after the update.
How to auto provision?
Consult the auto provision server address with your ISP.
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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