Yealink SIP-T31G Administrator's Guide

Administrator’s Guide for SIP-T2 /T3 /T4 /T5 /CP920 IP Phones
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key=OK
Variable Values List
Yealink phones also support a combination of the variable values in the URI, but the order of the variable value is
determined by the operation of the phone. The valid URI format is: http(s)://<phoneIPAddress>/servlet?key=variable
value[;variable value]. Variable values are separated by a semicolon from each other. This method is not applicable
to T57W/T48U/T48S/T48G phones.
The following shows an example for deleting all entries from the call history list when the phone is idle:
For CP920 phones:
http://10.3.20.10/servlet?key=F1;OK;F3;DOWN;DOWN;DOWN;OK;OK.
For other phones:
http://10.3.20.10/servlet?key=F1;F3;DOWN;DOWN;DOWN;OK;OK.
Note: The variable value is not applicable to all events. For example, the variable value “MUTE” is only applicable when the
IP phone is during a call.
When authentication is required, you can use the following URI format: http(s)://user-
name:password@<phoneIPAddress>/servlet?key=variable value. If you are using a browser, we recommend that
you use Firefox.
The following table lists predefined variable values:
Variable Value Phone Action
OK Press the OK/√key. (not applicable to T57W phones)
ENTER
Press the Enter soft key. (not applicable to T57W/T48U/T48S/T48G
phones)
SPEAKER Press the Speakerphone key. (not applicable to CP920 phones)
F_TRANSFER Transfer a call to another party.
VOLUME_UP Increase the volume.
VOLUME_DOWN Decrease volume.
MUTE Mute a call.
F_HOLD/HOLD Place an active call on hold.
F_CONFERENCE
Press the Conf/Conference soft key.
Cancel/CANCEL Cancel actions, reject incoming calls or end a call.
X
Cancel actions, reject incoming calls or mute or un-mute calls. (not
applicable to T57W phones)
0-9/*/POUND Press the keypad (0-9, * or #).
L1-LX
Press the line keys (for T57W/T48U/T48S/T48G, X=29; for
T54W/T46U/T46S/T46G/T29G, X=27; for
T42U/T42G/T42S/T41P/T41S, X=15; for T53W/T53/T43U/T27G,
X=21; for T33P/T33G, X=12; for T40P/T40G/T23P/T23G, X=3; for

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