1.The wireless PBX adopts the 3U standard 19 inch chassis. It is composed of the following 7 boards: MPU board,GSM board, CDMA board, FXS board, FXO board, BAK board and the POW board; 2.Support full range of frequency for GSM/CDMA network; 3.Support IDD, DDD, local calls with both landline and wireless network; 4.Support both landline and wireless network access, support PSTN/GSM/CDMA multiple access and Support extension number, direct dial, call forwarding etc;; 5.Support manual or automatically routing; 6.Presetting local number segment/blocked numbers/free numbers/IP prefix; 7.Safety setting: PIN coding, encryption; 8.Support voice recording/colorful ring back tone customizing 9.Support remote updating and fault diagnosis and hybrid GSM/CDMA interface 10.Provide anti-polarity signal for billing system/Support Caller ID and G3 fax function (optional);