Can the SDP answer be actually sent through PRACK?  Shouldn't it be sent 
in ACK for 200 Ok?

Sanjay Sinha (sanjsinh) wrote:
> 200 OK to the Prack and then terminate the Invite with 488.
>
>   
>> -----Original Message-----
>> From: [EMAIL PROTECTED] 
>> [mailto:[EMAIL PROTECTED] On 
>> Behalf Of Nithin N
>> Sent: Wednesday, April 02, 2008 7:24 AM
>> To: [email protected]
>> Subject: [Sip-implementors] Offer/Answer Violation in RPR Cases
>>
>> Hi All
>>
>> If an Offer/Answer violation happens in RPR case, how shall we 
>> terminate the dialog. For example, if PRACK is received with a 
>> malformed SDP, what shall be the error response code that 
>> needs to be  sent to UA.
>>
>> UA                           SBC                Proxy
>> |      INVITE                   |                             |
>> |-------------------------->|        INVITE         |
>> |                                     |-------------------->|
>> | 100 Trying                 |                             |
>> |<--------------------------|   100 Trying       |
>> |                                    |<---------------------|
>> |                                    | 183(sdp offer)   |
>> | 183(sdp offer)          |<---------------------|
>> |<--------------------------|                              |
>> | PRACK(malformed |                             |
>> | sdp answer)             |                             |
>> |-------------------------->|                             |
>>
>> Regards
>> Nithin.N
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>>     
>
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