PLANET VIP-1680 - Manual (Page 59)

FXS (Foreign exchange Station) port
The FXS port allows the connection to an end node, like telephone, fax machine, or out-line of PBX
system.
FXS port is as like your local phone service provider who provides a number to you. It is easy to tell that
after you have connected an end-device to FXS port and you will hear the dial-tone from FXS port once
the hand set off-hook.
FXS
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Caution
The FXS port is with voltage and current. DO NOT connects the port to any
PBX extension line or PSTN line. This may make the FXS port or your PBX
extension port malfunction.
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