"Cabling? ... the scanner uses 2 wires on a standard ethernet cable and its standard ethernet to the AS port 1 (line1)"
Just to be clear, the AS port is NOT an ethernet connection, it is a serial connection,
form this I expect 3 wires (Tx, Rx, Gnd) or 4 wires (Tx+/Tx-,Rx+/Rx-) to be used.
you can use UTP-grade cabling to connect if correct wires are used on both ends.
As it is serial, you need to match the serial speed (baudrate), 7/8 bits, stop bit, parity of the scanner to the AS port settings.
You mention you copied the router config from an existing router, does the scanner also works on the existing router?
if not you may need to configure serial settings on the scanner.