Yealink SIP- T28P User Manual

Enterprise IP Phone Overview
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 Call /Line Appearance Button LEDs for BLA (Bridged Line Appearances)
LED Status Description
Steady green All of the members are in idle status
Steady red
Some part（s）is seizing the line
Blinking green 300ms Some part(s) is ring-back
Blinking red 300ms Some part(s) is ringing
Steady orange Some part(s) is on the phone
Blinking Orange 500ms Some part(s) is under the public hold status, and all of the
members can retrieve the call
Blinking green 500ms Some part(s) is under the private hold status, and only the
initiator can retrieve the call
Blinking red 500ms Three way conference, all of the parts press hold
Off It is not active as BLA
Table 3 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 is in idle status whatever registered
/unregistered
Table 4 Power Indication LED
LED Status Description
Steady green Power on
Off Power off
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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