Yealink SIP-T40G User Manual

User Guide for T4 Series IP Phones
58
For the SIP-T42S/T42G/T41S/T41P/T40G/T40P IP phone, navigate to
Menu->Settings->Basic Settings->Display->Backlight.
2. For the SIP-T48S/T48G/T46S/T46G IP phone, select the desired level from the Active Level
field.
3. For the SIP-T48S/T48G/T46S/T46G IP phone, select the desired value from the Inactive
Level field.
4. Select the desired time from the Backlight Time field.
5. Press Save.
Backlight is configurable via web user interface at the path Settings->Preference.
Configuring the Contrast
You can configure the LCD screen contrast to a comfortable level for the SIP-T40G/T40P IP
phone. The level ranges from 1 to 10 and 10 is the highest level.
Procedure:
1. Navigate to Menu->Settings->Basic Settings->Display->Contrast.
2. Select the desired value in the Contrast field.
3. Press Save.
Contrast is configurable via web user interface at the path Settings->Preference.
Changing the Language
The default language of the phone user interface is English. If the language of your web browser
is not supported by the phone, the web user interface will use English by default. You can
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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