Hi, I was wondering how to set this up: I have 4 PSTN lines connected to a Patton. I want to optionally be able to have our customer reps place outgoing calls through one of the PSTN lines when dialing a certain prefix. The issue is that I don't know how to automatically select one of the 4 PSTN lines since some of them might be busy. So, how can I achieve it that if e.g. rep dials 0, it automatically picks a non-busy PSTN line for him? Thanks!