... 2.PCI 2.2 Slot 3. PSTN, Phone, CDMA, GSM Support 4.DTMF Detection 5.Factory Price SinoV-GSM400 4GSM GOIP asterisk card/asterisk voip ... . . Features:1,Support the access of wireless (GSM ), PSTN, Phone. 2,Supports GSM, CDMA two kinds of wireless communication standard. 3 ... distribute the voice channels automatically. Applications: 1, GSM (CDMA)- VoIP gateway 2, Mobile IP-PBX 3, GSM (CDMA) Call back 4 ...