1.4 Port Asterisk GSM Card 2.PCI 2.2 Slot 3. PSTN, Phone, CDMA, GSM Support 4.DTMF Detection 5.Factory Price SinoV-GSM400 ... /1900M. 4,Support 8 channels, user can choose to insert wireless, FXO or FXS module in each channel. 5,The PCI slot is ... urge with the special-purpose drive chip, it make the card has super strong anti-interference. And support clock resume automatically ...