[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [school-discuss] Cat-5 question
1. Keep 18" or more away from fluorescent lights.
So, runs in an attic that go above lights may be a problem?? Yikes!
2. Just be sure that the pairs match up to the pattern:
AaBCcbDd
...or if you prefer colours use O=Orange U=blUe G=Green N=browN as follows
(the colours do actually have a proper order, but I can't remember what it
is, and it shouldn't matter within the one cable, as long as the pairs work
out), capital being solid colour and lowercase being striped/white:
OoGBbgNn
Crimping any old how works for short cables, not for long. `Long' is a greater
distance for 10Mb than 100Mb. An example of a typical _WRONG_ pairing is:
OoGgBbNn
The last example is exactly what I have been using (and have had no problems except in the longest run) I realize this is convention but does anyone have any experience using a non-conventional pairing and having performance increases when switching (has changing fixed the problem?) to the convention? I am just wondering if I should pull the works, get another box of cable and do it all over or if maybe I can salvage what I have by replacing a few ends with the right pairing.
I appreciate all the helpful responses and will wait til this after noon to decide my own fate. Maybe you who are in the know can "vote" on how HomeTech Charter School can be operational by the beginning of school.
Also, we will be deploying a four server internet, DMZ with web and mail, local host/squid,proxy and admin network solution. If anyone wants to help install and test our solution or you want to see a school-wide solution without commercial software in action, send me mail and I can let you know where and when.
Jim Aird
HomeTech
-----Original Message-----
From: Jim Aird
Sent: 8/14/02 1:09 AM
Subject: [school-discuss] Cat-5 question
I just got a new box (1000ft) of cat-5 cable and made five new runs
through my office but couldn't get the links to come up. After several
hours of troubleshooting, re-crimping cables, moving hardware etc. I
discovered that the new cable (four twisted pairs) is conducting on many
tiny fibers of copper while the rest of our building, running fine, has
a solid piece of copper within each of the 8 individual strands.
Otherwise there is no difference.
Am I going nuts or is there something to the solid piece vs. the many
tiny strands difference?
Any help within the next 1-24 hours would be a huge help, so I can be
ready to drop in our new set of servers and firewalls and offer internet
filtering (squid) and related services to the students by the first day
of school.
Jim Aird
HomeTech Charter School