Just trying to expand my telephone cabling to make use of the three lines on
the FritzBox 7050. My questions are:

* Lines 1 & 2 have an RJ11 socket (or similar socket with RJ11 adapter -
can't remember) but Line 3 is hard-wired and expects two wires. I assume I
need to connect up a master socket to get a ring signal?
* I want to use some Cat6 cable solid core to wire up the telephone
circuits - is this suitable?
* I want to use one Cat6 cable right around the house, using three of the
wires for lines 1&2 and the last two for line 3. Do multiple master sockets
cause an issue, or can I only have one max on one line?

Thanks for your help!