4X E1/T1 interfaces 2 E1/T1 asterisk card PCI express

BD420DE is a 4 ports, selectable E1 (32-channel) or T1 (24-channel) card, This card supports both voice and data modes on its single span. The card supports industry standard telephony and data protocols, including R2, SS7 and Primary Rate ISDN (PRI) protocol families for voice and PPP, Cisco HDLC, and Frame Relay data modes. With the improved I/O speed, the card reduces CUP usage and increases card density per server. One host can plugged with multiple cards, particularly