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