... Method, Digital WaterMark Inside;8 Ch Video and 8 CH Audio per Card, Support 32 Ch Video at Most;Support Network ... , ISDN, DDN, ADSL, INTERNETOperating systemWINDOWS 2000,XP, 2003,7System requirementCPU: Intel Dual 2.0G for 8 channels, Dule 2.6G for ... channels, 2G for 16 channels.VGA Card: 256M Displaying MomoryMainBoard: Intel Chipset With PCI Slot.Software interface