General discussion


Does Cat5 need to be shielded?

By Tink! ·
I am still having problems with our DSL losing sync. I know signal is strong at NID. But between the NID and the router there is approx 50+ feet of Cat3 cable (looks unshielded).

If I moved the router closer to the NID and then used Cat5 cable to go from the router to the net server, should I use shielded Cat5 or will regular Cat5 be ok?

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If there is anything near the cable that puts out alot of EMI, shielded may be worth the extra cost. If there isn't really anything to interfere, unshielded should be ok.

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by allthegoodnamesweregone In reply to

electrical outlets should be ok. the lights are bad. any generator type thing is bad. unshielded should work. if cost is a serious issue, run the UTP, go to the grocery store and spend a couple bucks on aluminum foil, and if there are any sections where there should be high EMI, wrap the cables in a bundle in some foil.

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by Tink! In reply to

Didn't know aluminum foil could help "foil" EMI issues.

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by Tink! In reply to Does Cat5 need to be shie ...

Ok, let me clarify the sitch.

The Cat3 cable from the NID to the router is approx 50+ feet and runs near and next to MANY electrical outlets, fluorescent lights and other wires. Because we are in a factory it actually looks easier to replace the cable with Cat5 then to maneuver the Cat3 to be 18 inches away from everything.

I'm asking if regular Cat5 UTP will work okay because we have 100+ feet of it in-house. I am trying to avoid having to purchase shielded cable if at all possible.

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by jdclyde In reply to Does Cat5 need to be shie ...

It all depends on what is around where the cable is run. In most cases shielded is not required.

Cat3 is NOT acceptable and just changing that run to cat5 should resolve your issue.

Is there anything that would generate lots of EMI's such as industrial equipment? That would be the only time I would go with the shielded.

The other thing to check is to make sure ALL connectors are terminated properly. If there is exposed cable untwisted at each end, you can be getting "cross talk".

I personally would have had the local phone company drop the line in right next to the router, so no more than a 3 foot cable was needed. Doesn't sound like that is an option anymore?

Either way, everything should get switched over to cat5.

Good luck.

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by jdclyde In reply to

It sounds like it is time to have the telco MOVE where the line comes into the building! Show them where your closet is and let THEM get a clean line coming in.

If this isn't an option, I would look at FIBER before I would look at shielded. They make addapters that convert at each end from ethernet to fiber and back. Then buy a prefab of fiber to run the lenght. Remember to always leave a service coil in case you need to move this and to account for the ups and downs on your run. Plenty of cable vendors would even custom make this cable for you to the length you need.

This would resolve your EMI problems COMPLETELY, and is NOT an overly expensive way to go.

I would TRY the cat5 first though. Know anyone that has a tester to look for line noise?

100 feet of cable. This is NEW, right? Don't EVER reuse cable. Not worth it, when you can buy 500 feet for $50. The time to rerun the cable because it had a break will more than cover the cost of using new cable.

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by jdclyde In reply to

Well, that is a horse of a whole different color!

If this is a line run by the telco, it is THEIR line to fix, not yours!

Get THEM out there, because they DO have the equipment to troubleshoot THEIR line.

I thought this was a case of your company moving where equipment was located and ran that 50' cable.

Tell them you are dropping off, and let THEM diagnose it for you AND replace their lines that are NOT up to code for the environment they are in.

Good luck!

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by Tink! In reply to

Ok, I'll start getting on the phone company. I recall now that one of the techs who came out to test our line said himself that he'd have preferred to use Cat5 vs. the Cat3.

Course, I have to run this by the execs first...[sigh].
Thanks a bunch jd!

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by Tink! In reply to Does Cat5 need to be shie ...

jdclyde: Ideally yes, it would've been nice to have the line in the same room as the router. But since I wasn't here at the time the DSL or the phones were installed I didn't have a say in any of it. The DSL line is brought into the building at the same spot as all the other phone lines, which of course is 50+ feet away from our server. They have a splitter, located directly underneath our NID. And I already removed the voice line that was sharing the splitter with the DSL, so it's only the DSL on the splitter now.
The phone company then used Cat3 cable to go from the splitter to our Server Closet (50+ feet away) and terminated it at a jack in there. Our router then plugs into that jack as well as our server. I have the router at least 1 1/2 feet away from the server, monitor and electrical outlets.

My deductions lead me to the conclusion that it's a fault with the Cat3 cable. I would love to replace the distance with Cat5, however, am I allowed to move the jack that the phone company installed and trim the Cat3 to the short distance I want it?

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by jmgarvin In reply to Does Cat5 need to be shie ...

Wait, the telco is using Cat3? Get them out there force them to use Cat 5 STP (just to make them pay for being stupid) and make THEM fix THEIR problem.

They should have:
C) Should used Cat 5 and NEVER EVER EVER used Cat 3

Cat 5 will fix your problems, but it is the telco's (if I'm understanding this) line. Make them fix it. If they charge you raise a stink, there is NO reason for them to cut corners and use Cat 3 there.

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