Yealink SIP-T2 SERIES Administrator's Manual page 508

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
0-Disabled
1-Enabled
X ranges from 1 to 16 (for SIP VP-T49G/SIP-T48G/T46G/T29G)
X ranges from 1 to 12 (for SIP-T42G)
X ranges from 1 to 6 (for SIP-T41P/T27P)
X ranges from 1 to 3 (for SIP-T40P/T23P/T23G)
X ranges from 1 to 2 (for SIP-T21(P) E2)
X is equal to 1 (for SIP-T19(P) E2/CP860)
Web User Interface:
Account->Advanced->SIP Send MAC
Phone User Interface:
None
To configure SIP send MAC feature via web user interface:
1. Click on Account->Advanced.
2. Select the desired account from the pull-down list of Account.
3. Select the desired value from the pull-down list of SIP Send MAC.
4. Click Confirm to accept the change.
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.
486
Parameter Permitted Values Default