Hello! In the book by Charles Spurgeon on Ethernet, described here.
While I am not doubting the author concerning these signals, I am in fact searching for more information to confirm it.
Incidentally he mentions that they were never used.
Incidentally Rich the Amazon page contains your books as a part of the collection.
w.tinyurl.com/5ayt7u
We used them. Had a pre-10BASE-T network in the office, and a bunch of IBM PS/2 computers with 3com Ethernet adapters for the MCA bus. As I recall, all these cards had was the AUI port.
So, yes, we used them for some years. Then we switched over to standard 10BASE-T, when that became available. This was late 1980s and early 1990s.
Bert
I think the OP means the Control Out signals were never used. AUI ports were used for sure[1].
M4
[1] Recently I diked out a real (yellow) thick ethernet somewhere. No, it was not in use anymore.
I took a look at this section of Chuck's book, and he is correct in what he says about AUI, and that the Control Out signaling was never used in standard commercial products. Conceivably, some vendor used it for some proprietary function, but I doubt that you would ever run into it, even when AUI was in popular vogue.
-- Rich Seifert Networks and Communications Consulting 21885 Bear Creek Way (408) 395-5700 Los Gatos, CA 95033 (408) 228-0803 FAX
Send replies to: usenet at richseifert dot com
Cabling-Design.com Forums website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.