15 Feb
2006
15 Feb
'06
3:19 a.m.
Can I simply drop the ACK of the CANCEL according to the tag to solve
this problem?
The user should not be the one to solve the problem.
The UA1 device has
to behave properly, to keep the canceled dialog until the cycle
completes. Moreover, it should match the BYE to the proper dialog or
send back "call/leg transaction does not exist" when the call is no
longer active.
For
a long distance call, the time needed for completing the cycle will be
much longer.
Do you mean it can't be prevented in the voip/openser environment?
I would say no. In similar case to UA1 may be a gateway or multi-line
phone which can have several calls in parallel. The UA1 must follow
dialog matching specifications as per RFC3261 and everything should go
just fine.
Cheers,
Daniel
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