Exclude numbers from going to voicemail

How to exclude certain numbers from going to voicemail? I have some custom application with specific number and I need, when it calls to some extension, that it will ring still and not go to voicemail of the extension after x seconds.

Thanks in advance for your tips!


The only way I can think of being able to do this is to program up a couple of numbers on each phone. one would be the “regular” number, keyed on DID, the other would be linked to a separate inbound route(s) triggered by caller ID. There would be no voice mail on the second number.