Yealink SIP- T28P User Manual

User Guide for the SIP-T28P IP Phone
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2. Select Enabled from the pull-down list of Headset Prior.
3. Click Confirm to accept the change.
To use headset prior, you should activate the headset mode in advance:
1. Physically connect the headset.
2. Press to activate the headset mode.
Note
You can use two headsets when dual headset feature is enabled. To use this feature,
you must physically connect headsets to the headset jack and handset jack respectively.
Once the phone connects to a call, the headset connected to the headset jack will have
full-duplex capabilities, while the one connected to the handset jack will only be able to
listen.
To enable dual headset via web user interface:
1. Click on Features->General Information.
If headset prior is enabled, the headset mode will not be deactivated until you press the
HEADSET key again.
If headset prior is disabled, the headset mode can be deactivated by pressing the
speakerphone key or the HEADSET key.
Headset prior is configurable via web user interface only.

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