The Livingston-supplied cables with the PM3 didn't fit into my patch panel
scheme so I used my own homemade patch cable (I had some spare CAT5 cable
laying around for this but CAT3 would have worked fine). Theirs look a lot
prettier than mine but mine work just fine. I had the telco run BERT
testing to a hard loop on the end of these cables just to make sure. No
errors were found.
I saw the 50 foot T1 limit in my telecom books too but keep in mind that
there are two sorts of T1s in the world. There is the "classic" T1 from
years ago and then there are the HDSL T1s that most of us are seeing these
days. The HDSL unit sits in my phone room at the telco demarc and
regenerates the signal so that I've got plenty of signal at that point. It
is more than enough to go the 300+ feet to the computer room.
-- Ron Parker, Brazosport College
On Fri, 25 Apr 1997, Jake Messinger wrote:
> On Fri, 25 Apr 1997, Luther Keal wrote: > > > Support, > > > > OK folks, I'm runnning CT-1 and using the 20' cables out of the box > > supplied with the PM-3. Should we use different cables, (not that I think > > we should by the way). > > Hey lets not start a panic! Ask Livingston first before > suggesting that we NOT use the cables in the box. > > This discussion has come up before about using cat 5 for serial > connections but I dont believe specifically about rj-48 > > Regarding serial. Afer that discussion, I did A LOT of testing on cat 5 > passing serial data to printers at 9600 baud over varying lengths versus 8 > conductor 4 pair shielded wire. I found that I had NO problems at 9600 > baud. > > Due to the nature of t1 connections, I would think that you would need > to use a properly speced cable for it. I do NOT think Livingston would > ship a $20,000 product with the wrong cables. > > Just my 9 cents. > > ~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~ > Jake Messinger 713-772-6690 jake@ams.com > Advanced Medical Systems, Inc. jake@uh.edu > Houston, Texas http://www.ams.com/~jake > ~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~ > > One should not be measured by his/her ascii art ability. >