I’ve written a tool that subscribes message waiting indication of our SipX
4.2.1. When the program becomes closed it first tries to unsubscribe.



Unfortunately unsubscribing fails. The Notify after the Unsubscribe message
contains subscription state terminated but the 2xx message for the
unsubscribe contains an expires value > 0.

BTW: Unsubscribing dialog-event with my code works fine!



Following message flow:



-> SUBSCRIBE

<- 401

-> SUBSCRIBE W. AUTH

<- NOTIFY

-> 200 (for Notify)

<- 202 (for Subscribe)



…

-> SUBSCRIBE Expires 0

<- NOTIFY (subscription terminated)

-> 200 (for Notify)

<- 202 (Expires 486)





Am I the only one who ever unsubscribed MWI? (My program blocks until all
subscriptions are terminated, may I should just omit the unsubscription part
but that’s not the clean way). Is this a known bug?



Regards



Jan





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