I have a problem when calling to voicemail number from external.
1. When I call the voicemail DDI number, I am hearing ringback tone, instead of the voicemail greeting. If I call internally, it will work well, but not externally. I have did a debug and saw that the call did route into the CME correctly.
2. When I activate call forward all on one DN to voicemail and tried calling in from external, I am also hearing ringback tone (ringing w/o triggering to voicemail). However my call is actually recorded in voicemail.
However, if the call is overflow to voicemail when CFNA, it will work fine.
I am running CME 4.3 (IOS 12.4(15)XZ) with CUE 3.1.
Any advice is appreciated.
I have attached the CME and CUE config.