[SIPForum-discussion] A question about INVITE fork

Sunny guangu.he at gmail.com
Wed May 6 14:49:34 UTC 2009


Hi allI have a question about INVITE fork. see follow picture.

UAC                     Proxy            UAS1             UAS2
   |---------INVITE----->|                      |                     |
   |                          |-------INVITE--->|                     |
   |                          |----------------------|-------INVITE-->|
   |                          |<-------200--------|                     |
   |<--------200---------- |                      |                     |
   |----------ACK------->|                       |                    |
   |                          |---------ACK----->|                    |
   |                          |                       |                    |
   |                          |<-------------180---|--------------------|
   |<------180-------------|

when UAC received UAS2 180, the UAC have not corresponding transaction,the
UAC will discard 180 or other?

-- 
Thanks

Sunny
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