The P-Asserted-Identity header field is an important SIP header used among trusted SIP entities (typically intermediaries) to carry the identity of the user sending a SIP message as it was verified by authentication.

What is Rpid SIP?

The SIP Remote Party ID and SIP RPID Privacy header fields allow certain telephony services as well as some regulatory and public safety requirements. These services include the following: • calling identity delivery. • calling identity delivery blocking. • tracing originator of call.

What does P-asserted-identity stand for?

P-Asserted-Identity is a special type of UA identity implying “This is the proven ID for me within this trusted network”. Usuall UA ID is set in ‘From’ header, but the From header does not necessarly contain the actual identity. Actually, you can put any kind of string for ‘From’ header.

What is P-asserted-identity header?

The P-Asserted-Identity header field is used among trusted SIP entities (typically intermediaries) to carry the identity of the user sending a SIP message as it was verified by authentication.

Where is the P-asserted-identity field?

P-Asserted-Identity is used within the “trusted” realm of a SIP network to allow servers and services to process SIP messages for the known, authenticated user and not an anonymous caller.

What is the P-Asserted-Identity header used for?

The P-Asserted-Identity header field can be used to convey the proven identity of the originator of a request within a trusted network. Since the From header field is populated by the originating UA it may not necessarly contain the actual identity.

How do I manipulate call party identification information in asterisk?

Asterisk allows users to manipulate call party identification information through mechanisms like configuration options and dialplan functions (for instance CALLERID and CONNECTEDLINE to name a couple). This grants the user freedom to adjust values with regards to what call/caller information to expose and/or override.

Which SIP headers can be exposed in asterisk?

Primarily, with regards to the final presentation found in any applicable SIP headers: From, P-Asserted-Identity, Remote-Party-ID, Contact. Depending on the options and parameters set within Asterisk you can mask or expose some, or all of the caller’s presentation information.

What is the difference between P-Asserted-Identity and Pai?

If caller sends PAI, pass PAI is active, then P-Asserted-Identity usage setting does not matter, MOR resends received PAI to the callee automatically. If caller does not send PAI (or caller sends PAI but pass PAI is not active) and P-Asserted-Identity usage is enabled, MOR always constructs new PAI.