AAUI adapters and 10/100(/1000) Ethernet switches

As was mentioned briefly much earlier in the thread, these are not Etherwave units, just the plain-Jane Farallon AAUI transceivers with no special model name. I suppose all those chips could be line drivers and such. It just seemed like a surprising amount of complexity for something without, so far as I am aware, a microcontroller in it.

Well FWIW, Ethernet from the olden days, that I was aware of, had 2 standards. 568-A and 568-B. 

I only know B by heart, O/W-O-G/W-B-B/W-G-BR/W-BR

I still have a decent kit to make Ethernet wires, tester, rj45 ends, cat5 spool, and even anti snag jackets.

Haha! Techknight, it's the 'A' configuration that's ingrained in my mind:

g/w, g, o/w, b, b/w, o, br/w, b.

Reverse the green and orange pairs for 'B'. 'A' on one end, 'B' on the other makes a crossover cable. I seem to remember the 'A' configuration was slightly superior for riser (vertical) runs, but I suspect that textbook was written in Cat-3 days.

Pretty much everything is wired for 568B these days. The most annoying job site I encountered was when a jerk wired RJ-45 jacks in a non-standard way, likely in a bid to maintain job security (he was fired about a month before I got there). I was wondering why none of the plugs I made worked, well the wiring at the switch end was.... interesting. Plus he didn't even punch down all the pairs! He only wired two pairs and if I recall, they weren't even matched twisted pairs. Ugh.

that only makes things 50 million times worse. haha. 

Especially if they did not match the pairs correctly, then we get crosstalk on adjacent-like signals. WEEEEEEE