If the UAS continues the call, the behavior is implementation
specific. This could lead to one way media or no media at all. It may
happen that UAC sending codec-3 which UAS is not able to understand
and UAS sending previous negotiated codec that UAC may be able to
process. RFC 3264 specifies how answer should be created and does not
explicitly mentions about what to do in this scenario. Terminating the
session is the most logical thing to do in my opinion.
http://www.veraznetworks.com/
/Vikram
On Mon, Mar 17, 2008 at 1:56 PM, <[EMAIL PROTECTED]> wrote:
> What will happen if the UAS decide to continue the call?
> Actually, the UAC may have some errors, such as select a wrong codec
> outside the codec list of the SDP Offer. Will the continuing call cause
> a mismatch of the stream?
>
> Please also give reference about this beahvior? Thanks,
>
>
> Alex Zhang
> ESN: 6-554-8782
>
>
>
>
> -----Original Message-----
> From: Madhav Bhamidipati [mailto:[EMAIL PROTECTED]
> Sent: Monday, March 17, 2008 4:20 PM
> To: Alex Zhang (GDNTRND)
> Cc: [email protected]
> Subject: Re: [Sip-implementors] SDP Error Handling -- Unsupported codec
> in SDP Answer
>
> I wonder if it sends ACK in the first place with an unrelated codec.
> If UAC sends a kind of
> 4XX then call continuation is still possible, i.e UAS has still an
> option to continue the call with old parameters.
>
> If it sends ACK then UAS sends BYE with no other option.
>
> Madhav
>
> On 3/17/08, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
> > Hi,
> >
> > Can anybody give guideline about the UAS Behavior as below:
> >
> > UAC UAS
> > <========== Session Establised=========>
> > | |
> > |-----Re-invite(w/o SDP offer)--->|
> > | |
> > |<----200 OK(Codec1, Codec2)------|
> > | |
> > |-------ACK (Codec 3)------------>|
> > | |
> > | |
> >
> > Will UAS release the call or continue the call with the previous SDP?
> > Thanks,
> >
> > Alex
> > _______________________________________________
> > Sip-implementors mailing list
> > [email protected]
> > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
> >
>
> _______________________________________________
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