Re: (PM) Diff betw T1-Span & Ethernet Cables?

Jake Messinger (jake@ams.com)
Sat, 15 Nov 1997 20:37:06 -0600 (CST)

On Sat, 15 Nov 1997, Stephen Fisher wrote:

> > What is the exact type of cable that is used to connect the PM3 & the T1
> > box (we ordered Channelized T1) that the phone company drags to your
>
> Standard CAT5 cables, the PM3 comes with two to use.

Lets look at the BOOK. Ahh.. they are using the EIA/TIA 568-B
specification which says that 1=Ring 1 and 2=Tip for receive and 4= Ring
2 and 5=Tip 2 for Transmit data, so this means the corresponding T-R pairs
ARE twisted (as they should be) so this is Korrekt.

I remember in the olden days, we didnt get an RJ-48C, and had to wire it
ourselves, from a 4 pole terminal block.

Id put T1=4 R1=5 and T2=3 and R2=6 and use Non twisted flat
cable, and things were fine. This was for 9.6 sync leased lines.

~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~
Jake Messinger 713-772-6690 jake@ams.com
Advanced Medical Systems, Inc. jake@uh.edu
8300 Bissonnet #400 fax: 713-774-3498
Houston, Texas 77074 http://www.ams.com/~jake
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