Yealink SIP-T40P User Manual

Customizing Your Phone
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2. Select Enabled from the pull-down list of Dual Headset.
3. Click Confirm to accept the change.
Note
DSS Keys
There are two types of DSS keys: Line Keys and Programable Keys. The details will be
introduced in the following. The SIP-T40P IP phone supports 3 line keys and 11 programable
keys.
Line Keys
You can assign predefined functionalities to line keys. You can also define a label for a line key
feature which will appear on the LCD screen. Line keys allow you to quickly access features such
as recall and voice mail. The line key LEDs will indicate the monitored status when the line keys
are assigned with particular features, such as BLF. The default key type of each line key is Line.
To assign functionality to a line key via phone user interface:
1. Press Menu->Features->DSS Keys.
2. Select the desired DSS key, and then press the Enter soft key.
3. Select the desired key type from the Type field.
4. (Optional.) Select the desired key event type from the Key Type field.
5. (Optional.) Select the desired line from the Account ID field.
6. (Optional.) Enter the string that will appear on the LCD screen in the Label field.
7. (Optional.) Enter the corresponding value in the Value field.
Dual headset is configurable via web user interface only.

Yealink SIP-T40P Specifications

General

Wi-Fi	No
Quality of Service (QoS) support	Yes
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	10 - 95 %
AC adapter input voltage	100 - 240 V
AC adapter output current	0.6 A
Power consumption (typical)	3.23 W
Battery voltage	5 V
RJ-11 ports quantity	1
Ethernet LAN (RJ-45) ports	2
Display diagonal	2.3 \
Display resolution	132 x 64 pixels
Lines quantity	- lines
Phonebook capacity	1000 entries
Number of VoIP accounts	3
Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP Phone
Product color	Black
Voice codecs	G.711, G.722, G.726, G.729A, G.729B
Number of handles included	1 pc(s)

Weight and Dimensions

Depth	189 mm
Width	212 mm
Height	175 mm
Package depth	256 mm
Package width	620 mm
Package height	233 mm
Package weight	6400 g