http://en.wikipedia.org/wiki/Ethernet_over_twisted_pair10BASE-T and 100BASE-TX only require two pairs to operate, located on pins 1 plus 2 and pins 3 plus 6.
An ordinary category 5 cable has four pairs.
My googling has not helped me to locate a thin 2-pair cable for 100Mbit/s networking purposes which I would need to pull through a small empty pipe along with two other cables (coax) in my home. A 4.6mm cable that I found is likely too thick.
Does anyone here know if such a cable exist for purchase? Where?
Rumors on google back in 2002 said one was available in Japan (2mm x 1mm) by company "Loas". http://www.tweaktown.com/news/2486/new_ ... index.html
I could probably manage with a thicker cable, maybe up to 3.5mm.