FXO Module

The FXO module provides the Foreign eXchange Office (FXO) interfaces. Up to six FXO modules can be installed in the device. Each FXO module can provide up to four FXO interfaces and therefore, the device can support up to 24 FXO interfaces (i.e., 6 modules x 4 ports).

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The standard FXO module supports outdoor and indoor (lightning protection) loop-start signaling. The FXO G module supports both loop- and ground-start signaling (but only supports indoor protection).

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To enable ground-start signaling, use the [GroundKeyDetection] parameter (refer to the device's User's Manual).