Change main number voicemail

There is no default way to do this. The technician that set the system up will need to tell you the code to get in aand modify that wav file. There is no way to do so by default, it has to be set up, and can be anytihng.

Look at your config, for a short code that goes to a "vociemail collect" with the name recordings.....that is the code you use to modify.