This private exchange 8-port FXO module supports the Xorcom SPI (Serial Peripheral Interface) internal Astribank bus and is designed to operate with PSTN POTS lines. It supports 100% electronic operation (no relays) based on solid-state DAAs (Data Access Arrangements). The module is electrically isolated, with a capacitive coupled line circuit. Built-in surge protection tested per FCC part 68.
