What is RFC 3261 SIP?

What is RFC 3261 SIP?

RFC 3261 SIP: Session Initiation Protocol June 2002 sent from the server to the client. If the request is INVITE and the final response is a non-2xx, the transaction also includes an ACK to the response.

What are the warning codes in RFC 3261?

RFC 3261 SIP: Session Initiation Protocol June 2002 The descriptive text for the table of warn-codes is: Warning codes provide information supplemental to the status code in SIP response messages when the failure of the transaction results from a Session Description Protocol (SDP) ( RFC 2327 [ 1 ]) problem.

What is the target refresh request for SIP 3261?

RFC 3261 SIP: Session Initiation Protocol June 2002 INVITE, the only target refresh request defined is re-INVITE (see Section 14 ). Other extensions may define different target refresh requests for dialogs established in other ways.

What is the from header field in RFC 3261?

Rosenberg, et. al. Standards Track [Page 57] RFC 3261 SIP: Session Initiation Protocol June 2002 From: The From header field contains the address-of-record of the person responsible for the registration. The value is the same as the To header field unless the request is a third- party registration.