... 2.the stand-alone relay server 3G 4 channel H.264 DVS network video serveris the unique wireless high-definition video transmission equipment in China ... compression 1. patent C.S.I. code2. H.264 VBR, CBR compression 3. Compound packet,video,audio, GPS, Vehicle Speed ,PTZ and alarm ... control, playback, PTZ control and video.UHF Can be used separately, also can combine with 3G H.264 DVS to fill the gap ...