Hi Harpreet If I understand correctly, each of AS1, AS2, AS3 and AS4 have separate dialogs with each other. So, in the case following extract from RFC 3262 should be useful -
After the first reliable provisional response for a request has been acknowledged, the UAS MAY send additional reliable provisional responses. The UAS MUST NOT send a second reliable provisional response until the first is acknowledged. Hope it helps. On 9/12/06, Harpreet S Juneja <[EMAIL PROTECTED]> wrote: > > Dear All, > > I have a quick question: > > Should a B2B Application Server wait for PRACK of a SIP 181, before > sending > furture 181 messages ... > > or is this scenario correct > > AS1 AS2 AS3 AS4 > | | | | > |<------| | | > | 181 |<------| | > |<------| 181 |<------| > | 181 |<------| 181 | > |<------| 181 | | > | 181 | | | > |------>| | | > | PRACK | | | > |------>| | | > | PRACK |------>| | > |------>| PRACK | | > | PRACK |------>| | > | | PRACK |------>| > | | | PRACK | > > > Best reagrds, > Harpreet Juneja > _______________________________________________ > Sip-implementors mailing list > [email protected] > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > -- With Regards Retesh Chadha _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
