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So, about that cat 5e cable. ..
This thread has 17 replies. Displaying posts 16 through 18.
Post 16 made on Saturday June 16, 2018 at 07:10
buzz
Super Member
Joined:
Posts:
May 2003
2,715
Mother nature is not fair and stuff can fail any way that it pleases. There is always a danger that you'll never fix the situation after assuming that the failure must be [...] or cannot be [...], however, one should play the percentages and avoid chasing the 0.01% probability first.

Case in point: Customer called saying that Comcast sent them a new gateway, self installed, and the network is now down. As a quick, over the phone fix, we suggested reverting to the original gateway, but Comcast would not go along with that and they ended up putting the new gateway in bridged mode (correct plan of attack for this installation). Things were working. She then left town for summer vacation and he called three days later with "network down", suddenly while he was typing. Our first assumption centered on DHCP ranges, renewals, this or that had been reset or not reset -- the usual network fumbles. However, when we arrived we discovered cables not fully seated.
Post 17 made on Saturday June 16, 2018 at 08:42
Munson
Long Time Member
Joined:
Posts:
January 2003
468
On June 14, 2018 at 10:32, Mac Burks (39) said...
I had a similar issue at a project once. The cable didnt just test OK with a LAN "continuity tester"...it passed certification. It would not work between a switch and access point. I ended up swapping Cat5e's and used the "bad" one for component video (via crestron pvid & rmc) and the good one for the access point.

Also had a similar issue. Cat6 tested good with Fluke qualifier, wire works if I hook it to the AP in same location, but Crestron DM room box that worked for 5 years stopped working. AP works on both, DM on neither (240 foot run). Replaced everything but the wire in the ground and it still did not work. Ran a new temporary wire above ground and it works good.
Post 18 made on Saturday June 16, 2018 at 11:26
Ernie Gilman
Yes, That Ernie!
Joined:
Posts:
December 2001
28,295
Munson,
were you able to test resistance to ground on all of the DM wire conductors?

When we sub another cable in for an existing one, we:
put in new conductors
put in new connectors
change any voltage, resistive, or capacitive relationship to ground
reseat the connectors, which means
*with an RJ type connector, we wipe the pieces of metal against one another,
which can cure an oxidized connection
*push that puppy all the way in

Any one or more of those things can solve the problem when we envision what we've done is simply running "a new temporary wire above ground."
A good answer is easier with a clear question giving the make and model of everything.
"The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
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