... features. . Features:1,Support the access of wireless (GSM ), PSTN, Phone. 2,Supports GSM, CDMA two kinds of wireless communication standard. 3 ... to insert wireless, FXO or FXS module in each channel. 5,The PCI slot is based on PCI2.2. 6, Support the reversal ... to insert wireless, FXO or FXS module to each channel. GSM800 realize the integrate of Wireless(GSM or CDMA) and PSTN. 3 ...