Hi,

It is NOT possible to generate a new offer in the 2xx response. You can
only execute at most ONE offer/answer exchange per SIP transaction, and
you already did that in the INVITE/reliable 18x.

Regards,

Christer 

> -----Original Message-----
> From: [EMAIL PROTECTED] 
> [mailto:[EMAIL PROTECTED] On Behalf 
> Of Sonalkar, Rohit
> Sent: 18. huhtikuuta 2007 22:33
> To: [email protected]
> Subject: [Sip-implementors] Question about offer/answer model
> 
> In a call-flow where the initial offer in INVITE was answered 
> in a reliable provisional response, is it possible to 
> generate a new offer in the final 2xx response? So is the 
> following allowed as per 3261/3262:
> 
>  
> 
> Caller - INVITE (offer1) -> Callee
> 
> Caller <- 18x (answer1) - Callee
> 
> Caller - PRACK/200 -> Callee
> 
> Caller <- 2xx (offer2) - Callee
> 
> Caller - ACK (answer2) -> Callee
> 
>  
> 
> Thanks
> 
> Rohit
> 
>  
> 
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