3.9.5.6 Handling 2XX Responses

  • Article

A SIP proxy compliant with this protocol SHOULD handle 2XX responses according to proxy behavior described in [RFC3261] section 16.7. In addition, the CANCEL requests sent out as a result of a 2XX response SHOULD have an ms-acceptedby parameter in the Reason header field. The ms-acceptedby parameter value SHOULD be set to the address-of-record of the destination user agent that sent the 2XX response.