... ), PSTN, Phone.2,Supports GSM, CDMA two kinds of wireless communication standard.3,Support GSM: 850M/900M/1800M/1900M, CDMA ... -PBX3, GSM (CDMA) Call back4, GSM (CDMA) wireless bypasses system5, GSM (CDMA) wireless call centre.Hardware and software requirements:1, Interface ... Size(L*W*H): 210*105*24MM2, Weight: 305gThe environmental instructions for using:1, Temperature Operation: 0 to 80°C2, Temperature ...