Yealink SIP-T54S - SIP Send Line

Configuring Basic Features
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3. Select the desired value from the pull-down list of SIP Send MAC.
4. Click Confirm to accept the change.
SIP Send Line
The IP phone can send the line number in the REGISTER message. SIP send line allow adding
“Line:<linenumber>”(e.g., Line: 1) to the SIP header of the REGISTER message. The line number
is a number between 0 and 15.
The following table lists line number values for each phone model.
Phone Model
Line Number
Description
SIP-T54S/T48G/T48S/T46G/T46S/
T29G
0~15
0~15 stand for line1~line16
SIP-T52S/T42G/T42S
0~11
0~11 stand for line1~line12
SIP-T41P/T41S/T27P/T27G
0~5
0~5 stand for line1~line6
SIP-T40P/T40G/T23P/T23G
0~2
0~2 stand for line1~line3
SIP-T21(P) E2
0~1
0~1 stand for line1~line2
SIP-T19(P) E2/CP860/CP920
0
0 stand for line1
Example of a SIP REGISTER message:
REGISTER sip:10.2.1.48:5060 SIP/2.0
Via: SIP/2.0/UDP 10.3.20.14:5060;branch=z9hG4bK3990593443
From: "11" <sip:11@10.2.1.48:5060>;tag=255071842
To: "11" <sip:11@10.2.1.48:5060>
Call-ID: 1_2369214377@10.3.20.14
CSeq: 2 REGISTER