An ISP of their own (was RE: [rescue] Being jobless)

Dave McGuire mcguire at
Wed Jul 30 12:16:06 CDT 2003

On Wednesday, July 30, 2003, at 01:08 PM, Steve Sandau wrote:
>>> The old T1 in the last building just arrived as 4 copper wires from 
>>> the demark just like the phone lines. Dunno what "format" that was, 
>>> but there was no internal electronics at all..
>> That would be HDSL.  1.5 megabits over two pairs, 2 megabits over 3
>> pairs, maximum range about 20,000 feet.
> I thought it was not, since the HDSL we have requires a box on the 
> wall in our office. the old setup had 4 copper wires that came in off 
> the pole and went right into a CSU/DSU.

   It's not.  HSDL didn't exist in 1972, and T1s sure did.  T1/DS1 is a 
baseband digital protocol that runs relatively high voltages (compared 
to POTS lines) over bare copper.


Dave McGuire                 "You don't have Vaseline in Canada?"
St. Petersburg, FL                     -Bill Bradford

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