Yealink SIP-T31G Administrator's Guide

Call Features
416
Parameter
features.conference.local.enable <y0000000000xx>.cfg
Description
It enables or disables the local conference feature for the IP phone.
Note: It works only when “account.X.conf_type” is set to 0 (Local Conference).
Permitted
Values
0-Disabled
1-Enabled
Default
1
Parameter
features.conference.with_previous_call.enable <y0000000000xx>.cfg
Description
It enables or disables the phone to merge two calls into a conference directly by pressing the con-
ference key when there are two calls on the phone.
Permitted
Values
0-Disabled, users can select to set up a conference with the held party or a new party during multiple
calls.
1-Enabled
Default
0
Supported
Devices
All phones except CP920
Parameter
features.local_conf.combine_with_one_press.en-
able
<y0000000000xx>.cfg
Description
It enables or disables the phone to set up a three-way conference directly after the second party
answers the call.
Note: The CONF key is only applicable to T29G/T27G phones. The conference DSS key is not applic-
able to CP920 phones.
Permitted
Values
0-Disabled, the user needs to press the Conf/Conference soft key, CONF key or conference DSS key
again to set up a conference after the second party answers the call.
1-Enabled, the second party joins a conference with the first party after answering the call, both
phones play a warning tone.
Default
0
Parameter
transfer.tran_others_after_conf_enable <y0000000000xx>.cfg
Description
It enables or disables the phone to transfer the local conference call to the other two parties after the
conference initiator drops the local conference call.
Note: It works only if "account.X.conf_type" is set to 0 (Local Conference).
Permitted
Values
0-Disabled, all parties are disconnected when the conference initiator drops the conference call.
1-Enabled, the other two parties remain connected when the conference initiator drops the con-
ference call.
Default
0
Web UI
Features > Transfer > Transfer on Conference Hang up
Network Conference Configuration
Network conference, also known as a centralized conference, provides you with the flexibility of call with multiple
participants (more than three). The phones implement network conference using the REFER method specified in
RFC 4579. This feature depends on the support from a SIP server
For network conference, if any party leaves the conference, the remaining parties are still connected.
The following table lists the parameter you can use to configure the network conference.
Parameter
account.X.conf_uri
[1]
<MAC>.cfg

Yealink SIP-T31G Specifications

General

Mounting kit	Yes
Number of handles included	1 pc(s)
Display diagonal	2.3 \
Display resolution	132 x 64 pixels
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	10 - 95 %
Voice codecs	G.722, G.729, AGC, G.729A, AJB, PLC, G.711Mu, VAD, G.711a, G.723.1, G.726, iLBC, CNG, OPUS
AC adapter input voltage	100 - 240 V
AC adapter output current	0.6 A
AC adapter output voltage	5 V
Power consumption (typical)	3 W
Lines quantity	2 lines
Phonebook capacity	1000 entries
Number of VoIP accounts	2
Sustainability certificates	RoHS, REACH
Networking standards	IEEE 802.3af, IEEE 802.1p, IEEE 802.1Q, IEEE 802.1x
Ethernet LAN data rates	10, 100, 1000 Mbit/s
Ethernet LAN interface type	Gigabit Ethernet
Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP Phone
Product color	Gray
Harmonized System (HS) code	85171800

Weight and Dimensions

Depth	189 mm
Width	188 mm
Height	162 mm
Package depth	210 mm
Package width	213 mm
Package height	103 mm