We have a UC540 running with 4 FXO lines from the carrier.
When a call comes in the receptionist answers the phone and transfers the call. During a normal transfer the caller ID works fine showing the external callers caller ID information. However when the call goes to voicemail I get a VM notification from the receptionist. So in other words when I pull up my voicemail I have 5 voicemails from the receptionist and have no idea who they're really from because the caller ID apparently isn't passing to the CUE properly.
I tried changing the "transfer-system" config under telephony services but it didn't seem to have any effect.
Is there some command I'm missing?