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> Unless you're going for some kind of distance record, standard Cat5 will > work > without any issue on any modern installation. As I said, I'm pretty sure > (not 100%, but close) that the T1 specification is only Cat3, since it's > standard BellCore wire and they don't run your T1 loops (which aren't T1 > anymore, they're DS1 over HDSL or HDSL2) in

> Ever looked at the underground cable in the street outside your > building? If it's more than 20 years old, it's probably paper-insulated > gel-filled cable, with an _extremely_ thin amount of insulation between > the conductors and _zero_ insulation between the pairs. T1s seem to work > just fine on it, unless it's very old or they try to put more than 6-8 > spans

> I've never bothered to check to see if cat5 cables use the appropriate > mating twisted pairs or not. Since the pinouts are different for cat5 vs > T1 cables, I'd have to guess a single strand is used from two different > twisted pair groups. That wouldn't be cool, but in short runs it > probably doesn't have much of an impact. > IIRC, standard Ethernet uses