Calls to One Number Don't go Through

I have a system that can not seem to call one particular phone number. When the number is dialed, it will ring once, maybe twice and then it disconnects. When we call from a cell phone, it works perfectly.

I checked the Call Event Logging and the calls to this number don’t look any different then calls to other numbers, except the duration is just a few seconds. Not sure if I am not seeing something that would give me a clue there.

Any ideas or can I provide other information that can help?

https://wiki.freepbx.org/display/SUP/Providing+Great+Debug

Which log or command are you suggesting I run that might prove to be helpful in this situation?

Read the instructions and provide a complete call trace for the failed call.