... wireless, PSTN and INTERNET environment and Asterisk PBX system needs to provide all the features. . Features:1,Support the access of wireless (GSM ), PSTN ... , Phone. 2,Supports GSM, CDMA two kinds of wireless communication standard. 3,Support GSM: 850M/900M ... each channel. GSM800 realize the integrate of Wireless(GSM or CDMA) and PSTN. 3, High security: It adopts ...