The 1A4A00F from the A4 Series is a PCI card for 3.3/5.0V with 0-FXS/0-FXO and 4 ports.
Digium 1A4A00F 4 Port 0-FXS/0-FXO PCI Card Overview:
Connect your PTSN to an Asterisk connection with the only telephony board cards certified to work with Asterisk. Digium Cards offer the best choice for Asterisk implementations to your telephony network with their high performance, cost effective and quality telephony cards.
Digium offers a line of quality analog and digital interface cards for connectivity for your IP PBX, IVR, VoIP Gateway, or telephone network.
Digium 1A4A00F 4 Port 0-FXS/0-FXO PCI Card Features: