From: fergus.falconer@bt.com
Date: Tue Nov 12 2002 - 05:31:22 GMT-3
Joe
Snip from http://www.cisco.com/warp/public/129/bri-layer1.html
For a U interface, the cable should be straight through RJ-45 and should
contain the middle two pins (pins 4 and 5). An S/T interface, on the other
had, uses pins 3,4,5, and 6. To check whether the cable is straight through,
hold the RJ-45 cable ends side by side, and you should see that pins are in
the same order. Refer to RJ-45 Cables for further information on
distinguishing between the types of cables. Use a cable tester to ensure
that there is an end-to-end continuity on those pins. Also, the preferred
cable length is less than 23 feet (7 meters) and should not exceed 32.8 feet
(10 meters).
Antone know if there is a minimum cable length for ISDN? Specifically from
the U interface to the NT1.
Thanks,
Joe Martin
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