[SIPForum-discussion] Delayed 100 Trying

[Raj Kumaradass]

Hello,

I have observed a case where in 100Trying & 180ringing response for a
initial INVITE message is delayed beyond 32seconds(TCP transport being used
here) causes the client B to remain in a hung call state, as the T1 timer
expiry eventually causes dialog cleanup at the server side as below.


Client A ------  Server ------- Client B

                       --- INVITE ----->
                       @32seconds(T1 timer) fires and cleansup the dialog
                       after say 40 seconds
                       <---100 Trying---
                       <--- 180 Ringing --

In such case, is there any standard described way to get this cleaned up at
Client B side as well?  Is this covered up in any drafts?

thanks!
raj
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