Steve Maroney wrote: >I easily get confused when try to undertstand FXO & FXS ports. >Is it possible to use an ATA to connect to a TDM400 card. If >so, would I use FXO modules or FXS modules ? > > > Use an FXO module. It's always the opposite, the ATA provides 2 FXS ports. So, it will only allow FXO devices to connect.