[Neil]

Hi, & to the site.

Without wishing to sound harsh, this is a very common question, & one that can be easily answered by looking through the forum you have posted this in.

Here's a couple of places to start....

http://www.cableforum.co.uk/board/se...earchid=520315

http://www.cableforum.co.uk/board/forumdisplay.php?f=66

http://www.cableforum.co.uk/board/sh...ad.php?t=27977

http://www.cableforum.co.uk/board/sh...ad.php?t=27767