1.4 Port Asterisk GSM Card 2.PCI 2.2 Slot 3. PSTN, Phone, CDMA ... DTMF Detection 5.Factory Price SinoV-GSM400 4GSM GOIP asterisk card/asterisk voip gatewayProduct Description Products: SinoV-GSM400E is a ... with the special-purpose drive chip, it make the card has super strong anti-interference. And support clock resume ... requirements: 1, Interface: PCI 2.2 2, CPU 800+MHZ 3, RAM 128+MB 4, Linux kernel 2.4. ...