Another test or suggestion would be that if you are on a CISCO you should
be able to loop up the external CSU from either ends of the T1 by using
the interface specific command "loop remote line fdl ansi (CSU) or
bellcore (smartjack)". Loop back plugs also work pretty well if you
have easy access to both sides...
1->4
2->5
4->1
5->2
-blair
AT&T CERFnet
Backbone Engineering and Planning
| PGP Public Key: www.hfh.com/blair/pgp.txt |
On Mon, 20 Dec 1999, Pete Templin wrote:
>
> 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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