I have two lines: 1) VoIP --> internal number 105 2) PSTN (connected to FXO port VoIP Gateway) ---> internal number 110 I can phone from any extension directly throught VoIP (without internal prefix 105). But I can't phone directly from PSTN. The first I must choose internal number 110 and later proper phone number and it's OK. I don't konow how to leave out an internal prefix PSTN line. Outband call rule also doesn't help. What can be reason of that? Need I always use prefixes for PSTN lines?