Greetings,
I believe this question is a little different from the questions already
raised regarding BYE glare situations. (Though being new to the list, I
may be missing something.) I did find references to what kind of response
to send in step (3) below.
However, I'm looking for a recommendation as to what to do in step (4).
Sequenced scenario:
Side A sends a BYE request
Side A receives a BYE request (rather than the expected BYE response)
Side A duly sends a BYE response
Implementation question point -
Side A options for Step (4):
Option 1: Side A clears the call, no longer waiting for the BYE response to
its BYE request,
OR,
Option 2: Side A waits (or times out) for the BYE response to its request,
before clearing the call.
Option (1) acts on the established fact that both sides are interested in
ending the call, so no more messaging is necessary.
Option (2) lends better symmetry to both sides of the glare, since Side B
could have experienced the exact same sequence. It is therefore likely
that a BYE response is traveling somewhere between the application layers
of Side A and Side B.
I believe both options are compliant with the SIP spec.
Thank you,
Daniel Bar-Yakov
NMS Communications - Israel
www.nmscommunications.com
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