[Serusers] SER Nokia CANCEL Problem

Greger V. Teigre greger at teigre.com
Fri Feb 16 12:53:04 UTC 2007


It may be that you are not handling the CANCEL correctly. An early 
CANCEL (no Route headers) will have to be routed as an INVITE.
g-)

Abdul Qadir wrote:
> Hi,
>
> >I think ser should remember canceled transactions and send CANCEL in
> >case of delayed provisional replies.
>
> At present I don't think its working like this, As soon as CANCEL hit 
> SER an immediate too many hops is returned to sender and call 
> continues....resulting in ghost call, where A party has dropped after 
> sending cancel and B still carries on as no cancel was sent to B.
>
> Best Regards,
> Abdul Qadir
>
> */Klaus Darilion <klaus.mailinglists at pernau.at>/* wrote:
>
>     Abdul Qadir wrote:
>     > Hi ,
>     >
>     > I tried to call from one nokia sip (E61 and other models )phone
>     to another nokia sip phone. The call works fine. The problem comes
>     only when I call from Phone A to Phone B and then immediately
>     cancel the call(from Phone A). The Phone A will hangup the call as
>     it sent CANCEL but the SER will ignore this CANCEL and still send
>     INVITE to Phone B resulting in a ghost call situation.
>     >
>
>     Hi!
>
>     I think ser should remember canceled transactions and send CANCEL in
>     case of delayed provisional replies.
>
>     regards
>     klasu
>
>     > I tried to capture a log of message and found that Phone A
>     "CANCEL" message is received on SER even before any provisional
>     response from Phone B. Therefor SER doesnot relay this CANCEL
>     request to Phone B. I even checked RFC which clearly says that UAC
>     should not send CANCEL untill it receives any provisional
>     response. I talked to Nokia expert and they said the 100 Trying
>     message from your server is considered as provisional response,
>     therefor behaviour of client is absolutely correct.
>     >
>     > Is there any way I can stop 100 Trying message and still run
>     statefull SER, so that I can verify what nokia said. Any ideas
>     suggestions are welcome.
>     >
>     > Thanking you all in advance.
>     >
>     > Best Regards,
>     > Abdul Qadir
>     >
>     >
>     > ---------------------------------
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>     >
>     >
>     >
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>
>     -- 
>     Klaus Darilion
>     nic.at
>
>
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