The FXO modules provide eight foreign exchange office loop interfaces. Either of these modules should be selected when connecting voice line cards of a key system or PBX is required. PBX extensions may be extended to a remote site by combining a TSU on the remote end with FXS modules. The module can emulate the CO side of a DID (Direct Inward Dial) trunk. The module provides standard 2 FXO or DPT functionality to distances of 2400 feet.
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