... E 2.2 standards. It is mainly used in wireless, PSTN and INTERNET environment and Asterisk PBX system ... all the features. . Features:1,Support the access of wireless (GSM ), PSTN, Phone. 2,Supports GSM, CDMA ... channels, user can choose to insert wireless, FXO or FXS module in each channel. 5,The PCI slot ... support 8 channels, user can choose to insert wireless, FXO or FXS module to each channel. GSM800 ...