H7710 GPRS / CDMA DTU: RS232/422/485 interface, common foundation platform, customized application of choice, external Shenzhen Power Technology Development Co., Ltd. Acer H7000 wireless DDN system developed to provide users with high-speed, always online, transparent data transmission virtual private data communications network. Mainly for power system automation, industrial monitoring, traffic management, finance, securities and other sector applications, the use of GPRS / CDMA 1x network platform transparent data transmission, taking into account the needs of networking applications sector, the network structure virtual private network data. Particularly suitable for multi-center, multi-point distributed small amount of data transmission.