1.4 Port Asterisk GSM Card 2.PCI 2.2 Slot 3. PSTN, Phone, CDMA, ... Special Features:1, SinoV-GSM800’s driver totally compatible with TDM400P’s driver—WCTDM, so user don’t need ... the special-purpose drive chip, it make the card has super strong anti-interference. And support clock ... work in a PC with other asterisk cards, the driver will distribute the voice channels automatically. Applications: 1, ...