[57791] in North American Network Operators' Group
Re: DS3 Coax..
daemon@ATHENA.MIT.EDU (Stephen Sprunk)
Tue Apr 22 17:06:35 2003
From: "Stephen Sprunk" <stephen@sprunk.org>
To: "Josh Richards" <jrichard@cubicle.net>
Cc: "North American Noise and Off-topic Gripes" <nanog@merit.edu>
Date: Tue, 22 Apr 2003 15:46:16 -0500
Errors-To: owner-nanog-outgoing@merit.edu
Thus spake "Josh Richards" <jrichard@cubicle.net>
> Before fiber and ADMs were so common, in the days of buried coax
> for DS-3s (between COs and for the occassional large customer),
> coax was obviously being used for inter-building connectivity.
>
> How exactly did the topology differ? Besides fiber, which eliminates
> the issue of ground loops and such altogether, how did the RBOCs
> actually deal with this problem when they didn't have fiber in the
> ground?
Look in the telco vault of any large building old enough to have POTS lines
coming in on real copper -- there'll be huge fuse panels, one fuse for each
line; same technology was used for T1 and T3 circuits as well, though
probably with different fuses. I can't specify exactly what type of fuses
or panels you would buy, as I've religiously avoided inter-building copper
myself.
Fiber good, copper bad. Move along :)
S
Stephen Sprunk "God does not play dice." --Albert Einstein
CCIE #3723 "God is an inveterate gambler, and He throws the
K5SSS dice at every possible opportunity." --Stephen Hawking
