The S110M FXS module allows you to connect an additional analog telephone to your existing TDM400, TDM410, TDM800 or AEX800 board.

Because of the modular design, a user can activate additional ports at any time with more S110M or X100M daughter cards. The S110M module passes all the call features any standard analog telephone line will support.

You can also add the X100M FXO Module to connect more analog PSTN lines to your Digium analog card.