Hi,
The scenario is:
UAC UAS
| INVITE |
|----------------------->|
| 100 TRYING |
|<-----------------------|
| 180 RINGING |
|<-----------------------|
| 180 RINGING |
|<-----------------------|
<------- 200 OK INVITE sent and buffered
| 180 RINGING |
|<-----------------------|
| BYE |
|----------------------->|
| 200 OK BYE |
|<-----------------------|
| 487 |
|<-----------------------|
| ACK |
|----------------------->|
| 180 RINGING |
|<-----------------------|
| 180 RINGING |
|<-----------------------|
| 180 RINGING |
|<-----------------------|
| 180 RINGING |
|<-----------------------|
Is this scenario correct?
This is a collision case of a provisional reliable 180 response and a
BYE Request. The application on the callee side has sent a 200 OK
response, and the response is left pending in the SIP stack. Then the
collision occurs and the BYE is indicated to the application.
Regards,
Madhuri
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