Help diagnosing ethernet cable issue

[TubsAlwaysWins]

So I am trying to diagnose an ethernet cable that seemed to have stopped working about a week ago. It isn't being used in a normal Ethernet fashion, but it is still just your standard Ethernet cable (kind of). This ethernet cable connects a pair of HDMI to Ethernet adapters for a projector that is about 25ft off the ground. The cable was working great for about a month, until it stopped working. I had assumed that the reason it stopped is because it is run along a lighting truss and someone might have pinched a light around the cable. But heres the kicker - The cable tested out fine. I have access to a Fluke CIQ-100 and the cable tests out fine. All four pairs are fine, the cable passes the 1000/100/10/VoIP/Wiremap/Telco test with flying colors. The Fluke tester reads the cable to be 153ft with pairs 12 @ 156ft, 36 @ 158ft, 45 @ 163ft, and 78 @ 153ft.

The cable has no impedance or crosstalk faults. 

Both the input and output adapters have been validated for funcitionality together (I ran a temporary cable and they work fine on it)

Both of the ends have been replaced (just in case).

The cable is Ubiquity ToughCable with the matching ToughCable Ends, with proper ESD and grounding.

 

Thoughts? I have literally no clue why it would be doing this. Thanks!

[manikyath]

did you use a temporary cable in the exact same setup as the original one was in?

 

also, honestly... if a different cable works.. just swap out the cable i guess? i know its a shyte answer, but in a sense i dont see why i'd bother with more than that.

[mariushm]

Kinda out there, but is the cable routed in parallel to mains cables in the walls?  Or maybe under fluorescent lights that could affect the signals?

 

Are you sure the jacks are properly crimped? It could be that the weight of the cable can pull down on the wires when you have the cable installed at a height, compared to testing the cable on your desk.

Could also be the jacks are affected by heat after some time of use, resulting in some intermittent issue at the jacks ... and when you're testing the cable on a desk this issue doesn't happen.

 

Anyway, network cables are so cheap these days it's a bit silly to not just recrimp the ends or just buy another 25ft cable and be done with it. Even a cat5e cable can do 1gbps without any issues over 25ft ... you don't need any fancy expensive cable.

 

[TubsAlwaysWins]

1 hour ago, manikyath said:

did you use a temporary cable in the exact same setup as the original one was in?

 

also, honestly... if a different cable works.. just swap out the cable i guess? i know its a shyte answer, but in a sense i dont see why i'd bother with more than that.

The temporary cable just didn't follow the route of the the original one, but used the same ends

 

And I know swapping it is an option, I would just like to avoid it because the cable currently installed is a rather bothersome run (if I need to I will though)

[manikyath]

2 minutes ago, TubsAlwaysWins said:

The temporary cable just didn't follow the route of the the original one, but used the same ends

 

And I know swapping it is an option, I would just like to avoid it because the cable currently installed is a rather bothersome run (if I need to I will though)

is using the old cable as a "pulling cord" an option, or is there sharp angles or getting stuck behind edges to worry about?

[TubsAlwaysWins]

59 minutes ago, mariushm said:

Kinda out there, but is the cable routed in parallel to mains cables in the walls?  Or maybe under fluorescent lights that could affect the signals?

 

Are you sure the jacks are properly crimped? It could be that the weight of the cable can pull down on the wires when you have the cable installed at a height, compared to testing the cable on your desk.

Could also be the jacks are affected by heat after some time of use, resulting in some intermittent issue at the jacks ... and when you're testing the cable on a desk this issue doesn't happen.

 

Anyway, network cables are so cheap these days it's a bit silly to not just recrimp the ends or just buy another 25ft cable and be done with it. Even a cat5e cable can do 1gbps without any issues over 25ft ... you don't need any fancy expensive cable.

 

I believe it is close to some mains lines, but the lines are all in the shielded metal casing (idk what its called but the bendy metal tube thing that you can buy wire in), and the cable itself is insulated (a thick outer coating with a thin metal coating underneath that to protect from interference issues.

 

The jacks are for sure properly crimped, and the cable tester verifys it. The there isn't any strain on the connectors either, as proper strain relief has been installed at every necessary part

 

And replacing the cable is still an option, but its a 160ft run through walls that I would like to avoid if possible. The whole reason I used the nicer shielded cable was to make sure that all of my bases were covered and to know that good, strong cable is in the walls (it was supposed to prevent issues like this but here we are lol)

[TubsAlwaysWins]

2 minutes ago, manikyath said:

is using the old cable as a "pulling cord" an option, or is there sharp angles or getting stuck behind edges to worry about?

Ya theres some pretty sharp ones (around I-beams that have torch holes in them). Its possible for me to re run it by removing the walls where needed (decorative tin), i just have lots of other things to do and I would like to avoid putting it on the list.