[Spce-user] Upstream sends Bye instead of cancel

[qabane me]

Hi

On of our interconnects sends calls to us. When the caller cancels the call
before a session is established, they send us a BYE. That should be a
CANCEL as far as I know. This is causing issues with the callee's phone
continuing to ring. I am trying to argue with them but they are saying it's
allowed. I am trying to check the RFCs but am not finding ammunition. Does
any one have a link to show that indeed I am right and they are wrong?
(assuming that I am)

So the scenario is:
[image: image.png]
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