FXS
May 1st, 2011 by admin(Foreign Exchange Station) – A device usually located on the telephony company’s property, a FXS device send power through a channel to a phone on the other end. Digium makes FXS modules that interface with PSTN phones using FXO signalling in either Loopstart(fxo_ls) or the more common Kewlstart(fxo_ks) modes.