I notice that a lot of "telephone extension kits" as seen in the shops, are supplied with flat cable. Does this mean the pairs are not twisted? And if so, are there any implications to this?
I've just bought some own-brand telephone cable from CPC. It is the white round cable with twisted pairs inside. Following the advice on the earlier thread, I bought the 2-pair, 4-conductor cable. I notice there is a lot of space inside the white insulation. Is it supposed to be like this or is it because I bought a cheap brand? Does the manufacturer use the same outer insulation for the 3-pair and 4-pair cables and is this why there is space in my reel because these "extra" pairs are missing?