Yealink SIP-T40G User Manual

User Guide for T4 Series IP Phones
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A message is displayed on the LCD screen:
4. Press OK to delete.
Disabling History Record
History record feature is enabled by default, if you don’t want to save the call history, you can
disable the feature.
Procedure:
1. Navigate to Menu->Features->Others->General.
For the SIP-T48S/T48G IP phone, navigate to Menu->Features->General.
For the SIP-T42S/T42G/T41S/T41P/T40G/T40P IP phone, navigate to
Menu->Features->History Setting.
2. Select Disabled from the History Record field.
For the SIP-T48S/T48G IP phone, tap the Off radio box of the History Record field.
3. Press Save.
History record is configurable via web user interface at the path Features->General
Information->Save Call Log.
DSS Keys
There are three types of DSS keys: Line Keys, Programmable Keys and Ext Keys. Ext Keys are only
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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