I have a UC500 with CME7. There are 3 connected FXO ports and 1 FXS port as fax.
The IP phone does not have to dial a prefix for an outside line. The fax should always use the 3rd FXO port.
How can I configure a dial-peer / voice translation so that FXS port 0/0/0 always uses FXO port 0/1/3
without dialing a prefix like 9 or so.