From: Anthony Pace (anthonypace@fastmail.fm)
Date: Wed May 11 2005 - 18:50:08 GMT-3
I recently terminated a T1 and ISDN PRI in a remote location and was
able to see that the TELCO had terminated the T1 using a single pair and
the PRI using a single pair from the 25 pair bundle coming into the Data
Center's smart jacks.
I was always under the impression that from the CSU/DSU (in my case it
was built into the router) to the smartjack and subsequently the NI card
in the MPO was 4 wires. 1 pair TX and 1 pair RX.
Maybe between the CSU/DSU and the NI card it's 2 wires and then 4 for
the distance to the CO? ??? I am confused because I always believed that
DSL was born out of the efforts of finding a single pair alternative to
T1 technology.
Should PRI and DS1 be 1 pair or 2?
Anthony Pace CCIE 10349
-- Anthony Pace anthonypace@fastmail.fm
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