XVR to VMS licence (using as Video Encoder) GV-VMS 32CH-HD-DVR GV-VMS for 32CHs Platform with HD-DVR 4 port GV-VMS 32CH-HD-DVR GV-VMS for 32CHs Platform with HD-DVR 8 port GV-VMS 32CH-HD-DVR GV-VMS for 32CHs Platform with HD-DVR 16 port