[Sip-implementors] ACK - separate transaction
Hi, What is the reason for including ACK in an INVITE transaction for a non-2xx response and making it a separate transaction for a 2xx response? Is there any specific reason from the design perspective? Thanks, Hema.
Re: [Sip-implementors] ACK - separate transaction
An error response to an INVITE terminates a transaction. The error MAY occur before the INVITE reaches the actual destination. Example is a 404 generated by a proxy because it cannot route the INVITE to an actual UA. A 200 Ok for an INVITE, however, can only be generated by the