Yealink SIP- T28P User Manual

Enterprise IP Phone Customizing Your Phone
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->Advanced 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.
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:
1. The default password for unlock is admin.
2. Users can make emergency calls when the phone is locked.
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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