Yealink SIP- T28P User Manual

Customizing Your Phone
25
You can lock your phone temporarily when you are not using it. This feature helps to
protect your phone from unauthorized use.
Phone lock consists of the following:
Menu Key: The Menu soft key and MESSAGE key are locked. You cannot
access the menu of the phone until unlocked.
Function Keys: The function keys are locked. You cannot use the MESSAGE, RD,
CONF, HOLD, MUTE, TRAN, OK, X, navigation keys, soft keys, line
keys and memory keys until unlocked.
All Keys: All keys are locked except the Volume key. You are only allowed
to dial emergency numbers, reject incoming calls by pressing the
X key, answer incoming calls by lifting the handset, pressing the
Speakerphone key, the HEADSET key or the OK key, place an
active call on hold by pressing the Hold soft key or the HOLD key,
resume the held call by pressing the Resume soft key or the
HOLD key, and end the call by pressing the X key, hanging up the
handset, pressing the Speakerphone key.
Note
To activate the phone lock via phone user interface:
1. Press Menu->Settings->Advanced Settings (default password: admin) ->Phone
Lock.
2. Press or , or the Switch soft key to select the desired type from the Phone
Lock field.
3. Press the Save soft key to accept the change.
The emergency number setting, if desired, must be made before lock activation. For
more information, refer to Emergency Number on page 70.

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