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?