We are trying to set up a forwarding rule for our after hours on-call technician. When someone dials in, they select an option for emergency service from the digital receptionist. This connects them to the extension set up for the on-call tech (all calls are forwarded to a cellphone) If for whatever reason the on-call tech doesn't answer the call, we would like to then forward the call to an external number (our 24 hour answering service) The problem is, no matter how long I set the ring time in 3cx, the cell phone voicemail picks up. Every Time. Is there any way to make this work?