Quad Channel Analog Module Digium

The S400M FXS module allows 800 Series or 2400 Series analog cards to terminate four (4) analog stations per module.

The X400M FXO module allows 800 Series or 2400 Series analog cards to terminate four (4) analog lines per module.

Because of the modular design, you can activate additional ports at any time with more S400M or X400M daughter cards. The X400M module passes all the call features any standard analog telephone line will support.

Note: To use the S400M module, you must provide 12V DC power to the TDM800P card or TDM2400P card, either from the computer's power supply or from the Analog FXS Module Power Supply.

Function

FXS (Foreign Exchange Station)

FXS is an interface that connects to a station, such as an analog telephone or the FXO interface of another PBX. It provides ringing voltage and battery to the FXO devices. FXS interfaces are used on the inside of your PBX; they do not connect directly to the PSTN. One FXS channel is required for each telephone that you wish to connect to your Asterisk system.

FXO (Foreign Exchange Office)

FXO is an interface that connects to a trunk line, like the one from your service provider. It receives ringing voltage and battery from FXS devices. FXO interfaces are used to connect your PBX to the PSTN. One FXO channel is required for each line you receive from your telco.

Specifications

S400M and X400M are compatible with the following analog telephony cards:

800 Series
2400 series