23 Jan
2018
23 Jan
'18
noon
That's what I get for cutting and pasting from a Google search.....
Sorry...
bill
________________________________
From: cctalk <cctalk-bounces at classiccmp.org> on behalf of Bill Gunshannon via
cctalk <cctalk at classiccmp.org>
Sent: Tuesday, January 23, 2018 2:22 PM
To: Grant Taylor via cctalk; Grant Taylor
Subject: Re: Ethernet cable (Was: Sun3 valuations?)
If you want a real hoot try reading what
<https://books.google.com/books?id=tmbgBwAAQBAJ&pg=PA212&lpg=PA212&dq=what+was+the+purpose+of+the+black+bands+on+ethernet+cables?&source=bl&ots=DV53aRJc9P&sig=3GFr8Hz_uQjFELOrnXk8x8KjKVM&hl=en&sa=X&ved=0ahUKEwj-i_j_5u7YAhVD34MKHeSQC-wQ6AEIWzAG>
"A System Administrator?s Guide to Sun
Workstations"<https://books.google.com/books?id=tmbgBwAAQBAJ&pg…
has to say about it. Google has it available for reading.
bill
________________________________
From: cctalk <cctalk-bounces at classiccmp.org> on behalf of Grant Taylor via cctalk
<cctalk at classiccmp.org>
Sent: Tuesday, January 23, 2018 2:13 PM
To: cctalk at classiccmp.org
Subject: Re: Ethernet cable (Was: Sun3 valuations?)
On 01/23/2018 12:09 PM, Bill Gunshannon via cctalk wrote:
"Transceivers should be installed only at precise
2.5-metre
intervals. This distance was chosen to not correspond to the wavelength
of the signal; this ensures that the reflections from multiple taps are
not in phase. These suitable points are marked
on the cable with black bands."
It cites "IEEE Standard 802.3<https://en.wikipedia.org/wiki/802.3>-1985;-1985.
IEEE<https://en.wikipedia.org/wiki/IEEE>EE>. p. 121."
Thank you for correcting ~> educating me.
#learnSomethingEveryDay
--
Grant. . . .
unix || die