The TU determines the transaction to be cancelled by taking the CANCEL request, and then assuming that the request method is anything but CANCEL or ACK and applying the transaction matching procedures of Section 17.2.3. The matching transaction is the one to be cancelled. The processing of a...
130 17.1.2.1 Overview of the non-INVITE Transaction ... 130 17.1.2.2 Formal Description ... 131 17.1.3 Matching Responses to Client Transactions ... 132 17.1.4 Handling Transport Errors ... 133 17.2 Server Transaction ... 134 17.2.1 INVITE Server Transaction ... 134 17.2.2 Non-INVITE ...
RFC 3261SIP: Session Initiation Protocol June 2002Table of Contents1Introduction ...82Overview of SIP Functionality ...93Terminology ...104Overview of Operation ...105Structure of the Protocol ...186Definitions ...
client transaction (using the transport layer) to a server transaction, along with all responses to that request sent from the server transaction back to the client. The transaction layer handles application-layer retransmissions, matching of responses to requests, and application-layer timeouts. Any ...