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Yealink SIP-T31G Administrator's Guide

Yealink SIP-T31G
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General Features
495
General Features
This section shows you how to configure general features on Yealink phones.
Topics
Line Identification Presentation
Return Code for Refused Call
Return Code for Unanswered Call
Hide Feature Access Codes
Accept SIP Trust Server Only
100 Reliable Retransmission
SIP Session Timer
Session Timer
Reboot in Talking
Reserve # in User Name
Busy Tone Delay
CFG File Version Information
Media Loopback
Cloud
Line Identification Presentation
Yealink phones can derive calling and connected line identification from SIP headers and display the name asso-
ciated with the telephone number on the LCD screen.
Calling Line Identification Presentation (CLIP): It allows the phones to display the caller identity, derived from a SIP
header contained in the INVITE message when receiving an incoming call. Yealink phones can derive caller iden-
tity from three types of SIP header: From, P-Asserted-Identity (PAI) and Remote-Party-ID (RPID). Identity present-
ation is based on the identity in the relevant SIP header.
Connected Line Identification Presentation (COLP): It allows the phones to display the identity of the connected
party specified for outgoing calls. The phones can display the Dialed Digits, or the identity in a SIP header (Remote-
Party-ID, P-Asserted-Identity or contact) received, or the identity in the From header carried in the UPDATE mes-
sage sent by the callee as described in RFC 4916. Connected line identification presentation is also known as
Called line identification presentation. In some cases, the remote party will be different from the called line iden-
tification presentation due to call diversion.
Note: If the caller/callee already exists in the local directory, the local contact name assigned to the caller will be pref-
erentially displayed and stored in the call log.
For more information on calling line identification presentation, refer to Calling and Connected Line Identification
Presentation on Yealink IP Phones.
Topic
CLIP and COLP Configuration
CLIP and COLP Configuration
The following table lists the parameters you can use to configure the CLIP and COLP.
Parameter
account.X.cid_source
[1]
<MAC>.cfg
Description
It configures the identity of the caller.
Permitted
Values
0-FROM
1-PAI
2-PAI-FROM

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Yealink SIP-T31G Specifications

General IconGeneral
Mounting kitYes
Number of handles included1 pc(s)
Display diagonal2.3 \
Display resolution132 x 64 pixels
Operating temperature (T-T)-10 - 50 °C
Operating relative humidity (H-H)10 - 95 %
Voice codecsG.722, G.729, AGC, G.729A, AJB, PLC, G.711Mu, VAD, G.711a, G.723.1, G.726, iLBC, CNG, OPUS
AC adapter input voltage100 - 240 V
AC adapter output current0.6 A
AC adapter output voltage5 V
Power consumption (typical)3 W
Lines quantity2 lines
Phonebook capacity1000 entries
Number of VoIP accounts2
Sustainability certificatesRoHS, REACH
Networking standardsIEEE 802.3af, IEEE 802.1p, IEEE 802.1Q, IEEE 802.1x
Ethernet LAN data rates10, 100, 1000 Mbit/s
Ethernet LAN interface typeGigabit Ethernet
MountingDesk/Wall
Handset typeWired handset
Product typeIP Phone
Product colorGray
Harmonized System (HS) code85171800
Weight and Dimensions IconWeight and Dimensions
Depth189 mm
Width188 mm
Height162 mm
Package depth210 mm
Package width213 mm
Package height103 mm

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