Digium AEX800 - Eight FXS / FXO Ports Max - Optional Echo Cancellation The AEX800 is a PCI Express card used with Asterisk IP PBX (and variants) to
connect to traditional, analog telecommunication equipment. FXO: Analog telephone line connection - 1 call per port
FXS: Analog telephone or fax machine
connection - 1 device per port