Yealink SIP-T31G Administrator's Guide

Administrator’s Guide for SIP-T2 /T3 /T4 /T5 /CP920 IP Phones
58
If NAT is disabled, the port number shows in the Via and Contact SIP headers of SIP messages. If NAT is enabled,
the phone uses the NAT port number (and NAT IP address) in the Via and Contact SIP headers of SIP messages,
but still using the configured source port.
The following table lists the parameters you can use to configure SIP port and TLS port.
Parameter
sip.listen_port <y0000000000xx>.cfg
Description
It specifies the local SIP port.
If it is set to 0, the phone will automatically listen to the local SIP port.
Permitted
Values
0, Integer from 1024 to 65535
Default
5060
Web UI
Settings > SIP > Local SIP Port
Parameter
sip.tls_listen_port <y0000000000xx>.cfg
Description
It specifies the local TLS listen port.
If it is set to 0, the phone will not listen to the TLS service.
Permitted
Values
0, Integer from 1024 to 65535
Default
5061
Web UI
Settings > SIP > TLS SIP Port
Internet Port and PC Port
Yealink phones support two Ethernet ports: Internet port and PC port. You can enable or disable the PC port on the
phones. The CP920 phones have Internet port only.
Topics
Supported Transmission Methods
Internet Port and PC Port Configuration
Supported Transmission Methods
Three optional methods of transmission configuration for the IP phone Internet port and PC port:
l Auto-negotiate
l Half-duplex (transmit in 10Mbps or 100Mbps)
l Full-duplex (transmit in 10Mbps, 100Mbps or 1000Mbps (1000Mbps is only applicable to
T57W/T54W/T53W/T53/T48U/T48S/T48G/T46U/T46S/T46G/T43U/T42U/T42G/T42S/T40G/T33G/T31G/T29G/T2-
7G/T23G/CP920 phones))
Auto-negotiate is configured for both Internet and PC ports on the IP phone by default.
Internet Port and PC Port Configuration
The following table lists the parameters you can use to configure the Internet port and PC port.
Para-
meter
static.network.pc_port.enable
[1]
<y0000000000xx>.cfg
Descrip-
tion
It enables or disables the PC port.
Per-
mitted
Values
0-Disabled
1-Auto Negotiation

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