Yealink SIP-T40G Administrator's Guide

Phone Customization
253
Devices
Parameter
features.headset_mode.enable <y0000000000xx>.cfg
Description
It enables or disables the phone’s headset mode.
Permitted
Values
0-Disabled
1-Enabled
Default
1
Supported
Devices
All phones except CP920
Parameter
features.headset.group_listen_in_talking_enable <y0000000000xx>.cfg
Description
It enables or disables the phone to enter into the group listening mode by pressing the Speakerphone
key when you first answer the call using the headset.
Note: The audio is sent only through the headset. So you are able to speak and listen through the
headset, but you can only listen through the speaker. It is not applicable to Bluetooth headset.
Permitted
Values
0-Disabled
1-Enabled
Default
0
Supported
Devices
T57W, T54W, T53W, T53, T48U, T46U, T43U, T42U, T48S, T46S, T42S, T41S and T27G
Parameter
phone_setting.headsetkey_mode <y0000000000xx>.cfg
Description
It configures headset mode during a call.
Permitted
Values
0-Always use (pressing the Speakerphone key and picking up the handset are not effective when the
headset mode is activated)
1-Use as normal
Default
1
Supported
Devices
All phones except CP920
DSS Keys
There are three kinds of DSS keys: Line Keys, Programmable Keys, and Ext Keys. You can assign various functions
to DSS keys. This section explains how to set these keys.
Line key is not applicable to T19(P) E2/CP920 phones, ext key is only applicable to expansion modules connected
to T57W/T54W/T53W/T53/T48U/T48S/T48G/T46U/T46S/T46G/T43U/T29G/T27G phones.
Note: If the phone is downgraded to an earlier firmware from firmware version 83, the DSS key configuration will be reset
after downgrading.
Topics
Supported DSS Keys
Supported Dsskey Types
Line Keys
Programmable Keys
Ext Keys
Dsskey Lock Configuration
Dsskey Page Reset Configuration

Yealink SIP-T40G Specifications

General

Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP Phone
Product color	Black
Wall mountable	Yes
Wi-Fi	No
Security algorithms	AES, HTTPS, SSL/TLS
Networking standards	IEEE 802.3af
Ethernet LAN interface type	Gigabit Ethernet
Supported network protocols	FTP, TFTP, HTTP, HTTPS
Voice codecs	G.711, G.711a, G.711u, G.722, G.726, G.729ab
RJ-11 ports quantity	1
Ethernet LAN (RJ-45) ports	2
AC adapter input voltage	100 - 240 V
AC adapter output current	0.6 A
AC adapter output voltage	5 V
Power consumption (typical)	1.6 W
Certification	CE, FCC, ISO 9001
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	10 - 90 %
Volume control	Digital
Display diagonal	2.3 \
Display resolution	132 x 64 pixels
Lines quantity	3 lines
Phonebook capacity	1000 entries
Number of VoIP accounts	3
Number of handles included	1 pc(s)

Weight and Dimensions

Depth	175 mm
Width	212 mm
Height	54 mm