Yealink SIP-T40G Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
126
Permitted
Values
-1-Do not modify the configuration.
0-Disabled, the backlight will be turned off after the handset is idle for about 10 seconds.
1-Enabled, the backlight will be turned off after the handset is idle for about 30 minutes.
Default
-1
Supported
Devices
W53H, W56H
Handset UI
OK > Settings > Display > Display Backlight > In Charger
Parameter
custom.handset.backlight_out_of_charger.enable <y0000000000xx>.cfg
Description
It enables or disables the handset backlight to be on for about 30 minutes when it is not charged.
Note: It will take effect on all handsets that are registered on the same phone. It works only if “stat-
ic.auto_provision.handset_configured.enable” is set to 1 (Enabled).
Permitted
Values
-1-Do not modify the configuration.
0-Disabled, the backlight will be turned off after the handset is idle for about 10 seconds.
1-Enabled, the backlight will be turned off after the handset is idle for about 30 minutes.
Default
-1
Supported
Devices
W53H, W56H
Handset UI
OK > Settings > Display > Display Backlight > Out Of Charger
Handset Keypad Light
You can enable the handset keypad light to light up the keypad when any key is pressed. This helps you dis-
tinguish keys from each other in a dark environment.
Topic
Handset Keypad Light Configuration
Handset Keypad Light Configuration
The following table lists the parameter you can use to configure the handset keypad light.
Parameter
custom.handset.keypad_light.enable <y0000000000xx>.cfg
Description
It enables or disables the handset to turn on the keypad light (digital key, # key, * key, TRAN key, and
Mute key) when any key is pressed.
Note: It will take effect on all handsets that are registered to the same phone. It works only if “stat-
ic.auto_provision.handset_configured.enable” is set to 1 (Enabled).
Permitted
Values
0-Disabled
1-Enabled
Default
1
Supported
Devices
W53H, W56H
Handset UI
OK > Settings > Display > Keypad LED

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