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CUCM 4.2(1) to 4.2(3) Voicemail post-forward a hangup?

I recently upgraded from CUCM 4.2(1) to 4.2(3) thus, the Title.

The problem went unnoticed in the first day of the upgrades deployment, understandably so, the PSTN-side user would have had to call back and informed the IP side users to have any indication of the problem.

This is what happens:

PSTN caller dials (Extension A), Reception, who forwards the call to Extension B, Agent, who is not at their desk. The call gets sent to Unity and I see it in the Call Viewer from the Tools Depot:

Origin Internal, Reason Fwd(RNA), Trunk ID 0, Port ID 12, DN (Extension B) CN (Extension A), FWS (Etension B)

And the next line:

Duration = 2 sec

Which correlates to the user-experience of being hung-up on by the voicemail system.

This was working in CUCM 4.2(1) .. can anyone offer advice?


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