... ), PSTN, Phone.2,Supports GSM, CDMA two kinds of wireless communication standard.3,Support GSM: 850M/900M/1800M/1900M, CDMA: ... deviation to happened by the external world to influence the communication,the system can reset to the clock automatically, resume ... , GSM (CDMA) Call back4, GSM (CDMA) wireless bypasses system5, GSM (CDMA) wireless call centre.Hardware and software requirements:1, Interface ...