You could choose our FXO-100 or FXS-100 modules freely use with this product according to your requirememts.
A400P20 has 2 FXS100(green) modules pre-installed.
Key Features:
Scalable: Just add additional cards to extend system.
Easy to use : Full software and hardware compatible with Digium's TDM400P.* Module Pin to Pin compatible with X100M and S100M.You can use Digium's X100M/S100M module on this card, or use our FXO-100/ FXS-100 Module on TDM400P.
