Foreign exchange station
A Foreign Exchange Station, or FXS, is a telephone interface which provides battery power, sends dial tone, and generates ringing voltage. A standard telephone plugs into such an interface to receive telephone service. Strictly speaking, a telephone exchange is an example of an FXS, as is the plug on the wall, though the term is rarely applied except in connection with foreign exchange service.
In a nutshell
FXS is any device that, from the point of view of a telephone, seems to be a telephone exchange. As such, it should be able to supply power to the connected telephone, provide ring signals and dialtone, understand when phone goes on-hook or off-hook, and send and receive voice signals.
See also
- Foreign exchange office (FXO)
- Foreign exchange service
- Telephone line
- Telephone signaling interfaces
Reference
This entry is from Wikipedia, the leading user-contributed encyclopedia. It may not have been reviewed by professional editors (see full disclaimer)
