Thanks M8. Got one more for you.
I have 4 slaves, lets say they all have RJ45 type connector (for easy application). So one wire comes out from them, 4 in total.

How does one master connects with 4 slaves in terms of hardware. I have seen RJ45 splitters http://www.tvcables.co.uk/cgi-bin/tv...-splitter.html
Will I need 3 of these? (two plugged into 1)