Yealink SIP-T40G User Manual

User Guide for T4 Series IP Phones
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unmute the microphone or until the phone restarts. When you mute the phone in an idle state
or initiate a new call with mute on, the mute key LED glows red except on SIP-T40G/T40P IP
phone, and the mute icon appears on the Idle screen except the SIP-T42S/T42G/T41S/T41P IP
phone.
Note
Muting and Unmuting a Call
Procedure:
1. Press the MUTE key during an active call.
The mute key LED glows red except on the SIP-T40G/T40P IP phone. The LCD screen
indicates that the call is now muted.
2. Press the MUTE key again to unmute the call.
The mute key LED goes out except on the SIP-T40G/T40P IP phone.
Muting and Unmuting While Dialing
Procedure:
1. Press the MUTE key on the pre-dialing, dialing or calling screen.
The mute key LED glows red except on the SIP-T40G/T40P IP phone. The call is muted
automatically when set up successfully.
Keep Mute should be pre-configured by your system administrator.
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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