If you have an old PC lying around there is this sort of option (from another board I am a member off,
Ubuntu 10.04 + Zoneminder
2 x ccd cams (weatherproof) with 25m night vision off ebay
2 x 10m RG59+2 cables off ebay
4 x BNC crimpy things ebay
4 port PCI CTTV card - dealxtreme
Comments
http://www.maplin.co.uk/Module.aspx?ModuleNo=392998
If you have an old PC lying around there is this sort of option (from another board I am a member off,
Or you can go to a specialist company, e.g.
http://www.cop-eu.com/