Yealink SIP-T40P User Manual

Basic Call Features
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Recall key is configurable via web user interface at the path Dsskey->Line Key.
Call Mute
You can mute the microphone of the active audio device during an active call so that the other
party cannot hear you. You can also mute the microphone while dialing so that the other party
cannot hear you when the call is set up. It helps prevent the other party from hearing the
informal discussion when auto answer is enabled on his/her phone.
Call mute applies to all modes (Handset, Headset and Speakerphone).
Keep Mute
Normally, the mute feature is deactivated when the active call ends. Keep mute feature enables
you to make the mute state of your phone persist across calls. This feature should be
pre-configured by your system administrator. When keep mute is enabled and you press the
MUTE key, the phone stays in the mute state until you un-mute the microphone or until the
phone restarts. It helps prevent the other party from hearing the noise coming from your room
when auto answer is enabled on your phone. When you mute the phone in an idle state or any
other states, the mute key LED illuminates solid red and the icon appears on the status bar.
Muting a Call
To mute a call:
1. Press during an active call.
The LCD screen indicates that the call is now muted.
To un-mute a call:
1. Press again to un-mute the call.

Yealink SIP-T40P Specifications

General

Wi-Fi	No
Quality of Service (QoS) support	Yes
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	10 - 95 %
AC adapter input voltage	100 - 240 V
AC adapter output current	0.6 A
Power consumption (typical)	3.23 W
Battery voltage	5 V
RJ-11 ports quantity	1
Ethernet LAN (RJ-45) ports	2
Display diagonal	2.3 \
Display resolution	132 x 64 pixels
Lines quantity	- lines
Phonebook capacity	1000 entries
Number of VoIP accounts	3
Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP Phone
Product color	Black
Voice codecs	G.711, G.722, G.726, G.729A, G.729B
Number of handles included	1 pc(s)

Weight and Dimensions

Depth	189 mm
Width	212 mm
Height	175 mm
Package depth	256 mm
Package width	620 mm
Package height	233 mm
Package weight	6400 g