The SIP identity
SIP servers are often employed to provide telephony services. However, there is a problem where Public Switched Telephone Network (PSTN) does not support SIP addresses containing domains and alphanumeric characters. To identify a caller identity for the PSTN, a few methods were created and applied.
The draft-ietf-sip-privacy-04 document describes the
Remote-Party-ID header. While it has never became a standard, it is still quite popular among gateway manufacturers and service providers. See the following example:
Remote-Party-ID: "John" <sip:+554833328560@sip.com>; party=calling; id-type=subscriber; privacy=full; screen=yes
The preceding header sets the caller ID number as +554833328560 and caller name as "John"; it is a subscriber ...
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