[SIPForum-discussion] 481 call leg/transaction does not exists
Tomasz Karbowski
tom170 at o2.pl
Tue Jun 21 06:08:26 UTC 2011
Dear Raghul,
I think it's possible when the SIP server send an ACK message to your
device with wrong call-id (error of server, unspecified error).
Then your device will send back 481 call leg/transaction does not exists.
This can also happen in callback services for ex. when leg B answer the
call when leg A still is ringing.
Then Leg B drops the call and when leg A pickups it will send wrong
messages to Leg B and get 481.
Best regards,
Tom
Dnia 18-06-2011 o 23:23:51 Raghul Prasanna <raghul82 at yahoo.co.uk>
napisał(a):
> Hello all,
> Can a sip device receive 481 call leg/transaction does not exists for
> the ACK message it sent in response to a 200 OK? Please explain.
> Thanks,
> Raghul
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