[Sip] regarding session modification

[Srinivas <[e-mail]>]

Hi all,

Consider the following scenarios. 

 

1. 

C->S: INVITE (for speechrecog)

S->C: 200 OK

C->S: ACK

 

Now the SIP session is established b/w UAC and UAS. speechrecog resource is active on the established sip session

 

C->S: INVITE (re-INVITE for adding speechsynth resource)

S->C: 200 OK 

Offer/Answer fail for the new resource, TTS (speechsynth).

 

 

2. 

C->S: INVITE (for speechrecog)

S->C: 200 OK

C->S: ACK

 

Now the SIP session is established b/w UAC and UAS. speechrecog resource is active on the established sip session.

 

C->S: INVITE (re-INVITE for adding speechsynth resource)

S->C: 200 OK 

Offer/Answer fail for the for the existing ASR(speechrecog) resource also.

 

3.

C->S: INVITE (for speechrecog)

S->C: 200 OK

C->S: ACK

 

Now the SIP session is established b/w UAC and UAS. speechrecog resource is active

 

C->S: INVITE (re-INVITE for adding speechsynth resource)

S->C: 200 OK

C->S: ACK

 

Now both speechrecog and speechsynth are active on the sip session

 

C->S: INVITE (re-INVITE for removing speechsynth resource)

S->C: 486 BUSY HERE

 

 

What should be the behaviour of UAC in the above scenarios?

 

 

Regds,

Srinivas

 

 

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