FXS stands for Foreign Exchange Station. It is a term commonly used in telecommunications and refers to a specific type of analog telephone interface that is used in traditional telephony networks.
In telecommunication systems, FXS is the endpoint that provides the interface for connecting analog devices, such as standard telephone handsets or fax machines, to a digital telephone exchange or private branch exchange (PBX) system.
An FXS interface generates the appropriate voltage for powering analog telephones, allowing them to work on a digital network. It converts the voice signals from an analog device into digital signals that can be transmitted over a digital network. FXS interfaces are typically implemented in telephone jacks or ports found on telephone equipment or PBX systems.
Furthermore, the FXS interface also provides other features such as call waiting, call forwarding, and caller ID display. It enables users to make and receive calls using traditional analog devices, while taking advantage of the advanced services offered by digital telephony networks.
FXS interfaces can be found in various communication systems, such as residential telephone lines, small office/home office (SOHO) setups, and larger business telephone systems. It is important to note that FXS interfaces are usually paired with FXO (Foreign Exchange Office) interfaces, which are used on the network side of the connection to connect to the telephone service provider's central office or exchange.
