On 11/22/11 1:27 AM, Kumar, Puneet (Puneet) wrote:
> Hi All,
>
>
>
> I am working on a implementation issue where SIP message flow is:
>
>
>
> UAC UAS
>
> -------------INVITE w/o SDP-------->
>
> <-----------200 OK w/SDP------------
>
>
>
> Here UAC sends a slow start INVITE to UAS.
>
> UAS replies with a offer in 200OK.
>
>
>
> Now this 200OK has codec's which UAC doesn't support.
I presume you mean that the offer contains *no* codecs that the UAC can
support.
You must send an ACK. So send one with an answer that has the port set
to zero in the m-line with the unacceptable codecs, thus rejecting it.
After that you have two choices:
- send a BYE
- send a re-INVITE with an offer that suits you.
> What should be the response if this INVITE is a reINVITE w/o SDP ?
I think the same strategy works. But you could then re-offer what had
previously worked, with a higher expectation that it would work again.
Thanks,
Paul
_______________________________________________
Sip-implementors mailing list
Sip-implementors@lists.cs.columbia.edu
https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
