You are correct. the 568A or B spec shows that pin 1 is tip and 2 is ring.
Pin 4 is ring and pin 5 is tip for pair one. So for a tip to tip and ring to
ring crossover then 2 to 4 and 1 to 5 is correct.

> -----Original Message-----
> From: s vermill [mailto:[EMAIL PROTECTED]]
Also, it's interesting that 
> most people say 1
> to 4 and 2 to 5.  I don't have a copy of any specs offhand, but it's
> actually 1 to 5 and 2 to 4.  Being bipolar though, it doesn't 
> matter.  Ones
> and zeros are signalled by the magnitude of difference 
> between the potential
> at the A and B leads.  In other words, current is caused to 
> flow or it's
> not.  Doesn't matter which direction.  I'll see if I can dig 
> up something
> official on the pins...




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