In message , Phil Addison
writes


How many wires/pairs are there inside a catx cable? Perhaps mention that
catx cable is what you are familiar with connecting your computer to
router/cable modem (so long as its not a USB cable modem).

There are four pairs in the cable. For 10 and 100Mbit connections only
two are used. In theory it's possible to run a second connection over
the other two pairs but that's not to be recommended if you can avoid
it.

1000Mbit connections use all four pairs.



--
Bernard Peek