Openvox FXS400 Quad Channel FXS for A810 A1610 A2410 GW1202Model: FXS400Retail Price: $139 Overview The FXS400 Quad FXS module allows OpenVox Analog A810 A1610 A2410 series cards to terminate four analog telephones per module. Because of the modular design, users can activate additional ports at any time with more FXS400 or FXO400 modules. The FXS400 module passes all the call features any standard analog telephone line will support. Functions: FXS Foreign Exchange Station FXO Foreign Exchange Office An FXS