... stand-alone relay server 3G 4 channel H.264 DVS network video serveris the unique wireless high-definition video transmission ... equipment in China. base on 3G wireless network, transfer 4 Channel D1 full video in real time. ... Front panel : LED, Keyboard, record, network, Emergency buttonBoard : WCDMA,CDMA 2000,TD-SCDMA 3G modules and GPS modules, plug and play with 3G ...