Yealink SIP-T31G Administrator's Guide

Advanced Features
442
Default
0
Supported
Devices
All phones except T30P, T30, T19(P) E2 and CP920
Parameter
sip.terminate_notify_sub_delay_time <y0000000000xx>.cfg
Description
It configures the interval (in seconds) for the phone to re-subscribe when it receives the NOTIFY mes-
sage with the subscription state of Terminated.
If it is set to 0, the phone will re-subscribe immediately.
Permitted
Values
Integer greater than 0
Default
0
Supported
Devices
All phones except T30P, T30, T19(P) E2 and CP920
Parameter
sip.sub_refresh_random <y0000000000xx>.cfg
Description
It enables or disables the phone to use the random renewal mechanism.
Note: It works only if “account.X.subscribe_expires_overlap" is set to 0 (Disabled).
Permitted
Values
0-Disabled
1-Enabled, the phone will generate a random value. The final renewal time is equal to the original
renewal time plus the random value.
Default
0
Supported
Devices
All phones except T30P, T30, T19(P) E2 and CP920
Parameter
features.blf_extension.mode <y0000000000xx>.cfg
Description
It configures the function of the extension value when the dsskey type is set to BLF.
Note: The URI to which the SUBSCRIBE message should be sent is always the BLF value@<server-
IPaddress> .
Permitted
Values
0-Act as the user part of the SIP URI in a SIP INVITE message when pressing the BLF key
1-Act as the pickup code when picking up incoming calls to another phone
Default
1
Case Scen-
ario
Application scenarios (features.blf_extension.mode = 0):
The phone supports configuring BLF when SIP user is different from the number of the extension.
For example:
Set the SIP user (user part of the SIP URI) to be juhaszandrea@<serverIPaddress>, and the cor-
responding number of extension is 3060@<serverIPaddress> on the server.
Set the BLF key on the phone:
linekey.1.type = 16
linekey.1.value = juhaszandrea
linekey.1.extension = 3060
Result:
1. The URI to which the SUBSCRIBE message is juhaszandrea@<serverIPaddress>.
2. The phone dials out 3060@<serverIPaddress> when pressing the BLF key.
Supported
All phones except T48G, T46G, T42G, T41P, T30P, T30, T29G, T19(P) E2 and CP920

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