X100P clone

http://www.voip-info.org/wiki/view/X100P+clone

The X100P is a single port fxo (foreign exchange office) card whose job it is to interface an analog line from the phone company to your linux box. There are two variations of this card. The first consists of a Motorola chip and two small chips from Silicon Laboratories. The second card, also known as the x101p, consists of a Tiger Jet 320 chip and an updated Silicon Labs chip or chipset.