FXS


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FXS

(Foreign eXchange Station) The interface provided by the telephone company to its customers, which includes dial tone, power and ring voltage. The telephone jack on the wall is an FXS interface. The plug on a telephone is a Foreign Exchange Office (FXO) interface, which provides on-hook/off-hook loop closure to the telephone company. Thus, an FXO phone plugs into an FXS jack.

A PBX's FXO interface is connected to the FXS interface, and all phones (FXO) connect to the FXS interface on the PBX.
References in periodicals archive ?
Each FXS control includes a three-port Ethernet connection for additional FXS modules or local or remote human-machine interface (HMI) modules.
No population-based registries for FXS exist in the United States, and few children are identified by routine surveillance systems for birth defects and developmental disabilities.
Before becoming pregnant with the first child affected by FXS, 40 (29%) of 139 respondents knew that they had a family history of mental retardation, learning problems, or behavioral problems.