Yealink SIP-T54S Administrator's Manual page 565

Configuring Basic Features
Parameters Permitted Values Default
0-PAI-RPID
1-Dialed Digits
2-RFC 4916
When the RFC 4916 is enabled on the IP phone, the caller sends the SIP request message
which contains the from-change tag in the Supported header. The caller then receives an
UPDATE message from the callee, and displays the identity in the "From" header.
X ranges from 1 to 16 (for SIP-T54S/T48G/T48S/T46G/T46S/T29G)
X ranges from 1 to 12 (for SIP-T52S/T42G/T42S)
X ranges from 1 to 6 (for SIP-T41P/T41S/T27P/T27G)
X ranges from 1 to 3 (for SIP-T40P/T40G/T23P/T23G)
X ranges from 1 to 2 (for SIP-T21(P) E2)
X is equal to 1 (for SIP-T19(P) E2/CP860/CP920)
Web User Interface:
None
Phone User Interface:
None
account.X.cid_source_privacy 0 or 1 1
Description:
Enables or disables the IP phone to process Privacy header field in the SIP message for
account X.
0-Disabled
1-Enabled
If it is set to 0 (Disabled), the IP phone doesn't process Privacy header.
If it is set to 1 (Enabled), the caller identification information will be hidden and the IP
phone LCD screen presents anonymous if there is a Privacy: id in the INVITE request.
X ranges from 1 to 16 (for SIP-T54S/T48G/T48S/T46G/T46S/T29G)
X ranges from 1 to 12 (for SIP-T52S/T42G/T42S)
X ranges from 1 to 6 (for SIP-T41P/T41S/T27P/T27G)
X ranges from 1 to 3 (for SIP-T40P/T40G/T23P/T23G)
X ranges from 1 to 2 (for SIP-T21(P) E2)
X is equal to 1 (for SIP-T19(P) E2/CP860/CP920)
Web User Interface:
None
Phone User Interface:
539