Tim wrote:
Tim:I wonder if the way some cables are formed makes it easier to wire it one way or another? Hand wrangling the wires into the right place to crimp on a plug can be a right pain. You've got untangle wires, cross some over others, and get them all to go into the plug the same distance. It would have been a lot easier to do that if they'd come up with a wiring arrangement different from the current specs. i.e. A pair on 1 & 2, the next on 3 & 4, the next on 5 & 6, the last on 7 & 8, instead of having the break apart pairs and straddle others. I seriously doubt that would have degraded noise rejection.Mikkel L. Ellertson:It has to do with backward compatibility. Remember, the same jacks are used for more then Ethernet.I've read about that, but I really do not think it's a sensible thing to mix phone and ethernet wires together in the one connector as a standard thing to do.
Umm, but that is not the point. The point is that Ethernet over RJ11
jacks/cables was intended to run on *existing* installations of
CAT 3 (telephony) cable w/o having to run new wires. When a new run
is made, with CAT 5, then the new RJ45 would also accept the older
cables w/o forcing recabling between the terminal and the wall jack.
[snip]
Mike
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