1.4 Port Asterisk GSM Card 2.PCI 2.2 Slot 3. PSTN, Phone, CDMA ... card/asterisk voip gatewayProduct Description Products: SinoV-GSM400E is a four-way wireless voice cards, slot type is PCI-E socket, line PCI-E ... Wireless(GSM or CDMA) and PSTN. 3, High security: It adopts tertiary thunder preventing technology ... instructions for using: 1, Temperature Operation: 0 to 80°C 2, Temperature Storage: - ...