-----Original Message----- From: Alex Bligh [mailto:alex@alex.org.uk] Sent: Friday, February 25, 2005 10:32 AM To: Hannigan, Martin; Sam Stickland; nanog@nanog.org Cc: Alex Bligh Subject: RE: E1 - RJ45 pinout with ethernet crossover cable

--On 25 February 2005 09:43 -0500 "Hannigan, Martin" <hannigan@verisign.com> wrote:

...

Not that I know of, but I've never attempted what you describe. Putting the baluns in the loop will destroy the framing i.e. it's going to try and convert b8zs/ami to 802.x.

How does a balun destroy the framing (or rather line coding)? It's just a pair of transformers, and hence AC characteristics pass through intact. All you've done is converted impedance (and, IIRC, line voltage).

My mistake, I misunderstood their function. -M<