1.4 Port Asterisk GSM Card 2.PCI 2.2 Slot 3. PSTN, Phone, CDMA, GSM Support 4.DTMF Detection 5.Factory Price SinoV ... needs to provide all the features. . Features:1,Support the access of wireless (GSM ), PSTN, Phone. 2,Supports GSM, CDMA two kinds ... -PBX 3, GSM (CDMA) Call back 4 GSM (CDMA) wireless bypasses system 5 GSM (CDMA) wireless call centre.Hardware and software requirements: 1 ...