CCTV question

["Jonathan Shaw" <semi.jon@xxxxxxxxxxxxx>]

I am planning the next tranche of wires to go in and in the future I
may want to use CCTV.  I've looked at a few sites for cameras and cards
but cannot work out if I need a separate cable per camera or can they
be multiplexed onto the same cable at different frequencies (like
multiple TV channels on a single cable)??

If you can then that will reduce the number of cables nicely as I
should be able to join cables and then separate out onto a separate
port on arrival at the card.

Also what type of cable for CCTV?  RG59 suitable?

Thanks
Jon