Re: Serial line troubleshooting

From: Pete Templin (templin@urdirect.net)
Date: Mon Dec 20 1999 - 13:25:06 EST


On Mon, 20 Dec 1999, Steve Pfister wrote:

> I've got a new T1 installation that I can't seem to find the problem with.
> I'd like to be able to eliminate T1 misconfiguration as the source of the
> trouble. Can I connect the CSU/DSUs together with a straight-through cable
> to verify that the hardware on both ends is working properly? Or do I need
> some other sort of cable?

Flip-flop pins 1/2 with 4/5 at one end, and configure one of the CSUs to
provide timing on the line (ideally, do this on the _more_ accessible
CSU!). That timing change does mean that you can't test the line exactly
as the telco is supposed to provide it, but it's quite close.

And of course, leave a big note to change the timing back once you revert
to the telco line...

Pete

--
Peter J. Templin, Jr., CCNA
Systems and Networks Administrator

On-Line Internet Services - URDirect.net A division of Global On-Line Computers 2414 Babcock Rd. Suite 106 templin@urdirect.net San Antonio, TX 78229 (210)692-9911



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