General discussion


UTP vs STP cabling

By scalpel ·
Could somebody enlighten me whether there is any advantages of running STP instead of UTP cables? Does the shielding allow me to run the cables closer to power cables? And what about interference from telephone cables - does it affect UTP cables?
I'm just new at this and planning to run network cables to everyroom in my new house under construction. I've never done anything like this before.
Thanks in advance for any advice received.

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Everyone uses UTP in business

by stress junkie In reply to UTP vs STP cabling

Every place that I've worked uses UTP. On the other hand I have always wanted to use STP because in an office you end up running cables above a ceiling. Very often the cables run close to or over a flourescent light. I believe that these light fixtures would be a source of electromagnetic noise which would create electrical noise in nearby electrical wires, including network cables.

Having said that if I were going to wire a house I would probably use thin coaxial cable between the rooms and a cheap mini-hub in each room to convert the coaxial to UTP. Coaxial cable is shielded. The downside of coaxial cable is that it isn't as easy to work with. You have to remember to use T connectors to connect the mini-hubs and you have to have a 50 Ohm terminator on the end of the cable. Crimping BNC connectors on coaxial cable is a little bit trickier than crimping RJ-45 connectors onto twisted pair cables. In the end, though, I think that the coaxial cabling can provide a higher quality network than twisted pair. Keep in mind, though, that many of my colleagues do not agree with me.

If I didn't want to use coaxial cable then I my second choice would be STP. Sheilding on any kind of data wire should reduce the possibility of having electrical noise induced by running too close to some other electrical circuit.

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ADDED Cost of Ownership

by cowen80194 In reply to Everyone uses UTP in busi ...

Coax was good cheapnet but todays standards you would not want to use it.

I run 2 mini-6 for DS3 but that equipment is designed with a BNC connector.

Screened Twisted Pair STP is good to eliminate noise BUT you MUST use STP patch cords, patch panels, and jacks, the equipment must have fingers to use the Screen to complete grounding. and proper grounding using 6awg cable is required. Scrap off the paint to the metal before grounding. (Grounds SHALL be run to the main building ground rod) NEC code your electrician should know it.

With out the STP Patch cords ,jacks and patch panel all you did was run expensive UTP cable.

If you are worried about noise and can afford it use fiber it is highly upgradable just update the cards and switches to the speed you want. Get it pre terminated so you do not need a fiber kit.

Fiber is capable of long distances, Coper S/U TP is good to 300' that gives 28' to play with for your patch cords.

With fiber you can put it on a ballast and electric since its glass EMI generated pulses from a atomic/nuclear detonation will not affect it.
(That is why the government invested in the development of it and uses it in the Pentegon) Been there done it.

UTP is suitible for inside or outside use just make sure you get the right type.

Indoor or Outdoor and protectors for outdoor use.

You are using this in a House so the return air is ducted back so you do not need plenum grade cable which is non toxic if burnt in a fire.

Properly hang all cables ever 3-5' that will help resale value too in the future.

COAX had its day but I would only use it for device specific installs.

Coax Tv, Audio runs, Video runs, mostly 1 pair interconects.

In the future we will be using all 4 pairs of the cable for 1gig ethernet. So if you do that your 568B cable can update just by new adapter cards and switches. Coax you will need new "Media" Converters which is and additional expense.

Make sure you run a triplex or quad drop to each location for expansion and I would use 1" conduit for each drop. Add extra drop locations for future use in case you want to move funiture around.

You only want to fish it once and outside walls are a pain. the Extras will provide for phones to be placed in each room and a computer, network printer, XBOX, or TVs now have Internet connections.

Heck a 6plex might be better depending on what you will add.

Punch them all as 568B and label in blocks 1a-d/f 2a-d/f and so forth. Make a comitment that (a) is phone, (b) is pc, c-d/f is reserved for spare.

Do Not use a Home Depot command center either they are to small for data telephone is ok. Get a Rack and use or have a closet on an outside wall added for your data and telephone, and any other services. ie cable tv, sat, or what ever.

IT will get hot in there so have a window A/C unit installed to keep it cool in there.
dedicate breakers for that room and unit. You would be amazed how fast you can over load a circuit that shares other room electric runs.

I run 3 romex power cables to the electric panel and label it and let an elctrician make the connections. 120V and 240V for normal power and a UPS that I have (heavy duty).

I have a certified BICSI card and have been in the feild for 8 years installing and designing networks for major corporations. if you would like to check out the hows that are being introducded in to the industry for the last several years since MA Bell was broken up.

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topic almost 3 years old

by GiMMeABreak In reply to ADDED Cost of Ownership

You do realise this topic is almost 3 years old? First post dated 12/12/05

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yes, but ...

by doggersen In reply to topic almost 3 years old

Still, it is a great information-rich answer, that seems like it could be useful for many others.
at least I felt enlightened :-)

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Can it, Troll.

by cyrylthewolf In reply to topic almost 3 years old

The information is still well-presented and is still easily found using searches in Google.

Must you waste our time?

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Cost Analysis

by wmcmillin In reply to UTP vs STP cabling

Cost and efficiency are the two driving forces when running cable. UTP is widely used due to the cost. UTP can be very effective and there are some things that are needed to make sure you get the most out it. When running UTP you must make sure that you are at least 12 inches from any power line, cables or conduit. This prevents and noise generated from the power lines to cross over to the UTP causing NEXT and/or FEXT (Near End Crosstalk, Far End Crosstalk interference). Also make sure that there are no kinks in the UTP. Loops in the cables when pulled taught will cause kinks. This also causes NEXT and FEXT. If you have to run the UTP near flourescent lighting, make sure the cables are perpendicular to the lights. The balast in the lights are either at one end of the light or in the center. Make sure the UTP is as far as possible from the balast as possible. With these things taken into consideration, UTP should work without any problems.


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by cowen80194 In reply to Cost Analysis

Its nice to see someone who knows about NEXT and FEXT.

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Confirming the others

by tbc In reply to UTP vs STP cabling

As you can see so far, you will get as many opinions as responses. In this case though there is no one right answer, they are all correct, so far. So many different cable types are available because they are all popular in different situations by different people. For many, economics is the driver. When this is the case use the lowest quality and rated cable that your hub/switch recommends. It works fine. But if you are more worried about lowest error rates when the vacuum is in use, then use a higher rated one. Either twisting or shielding reduce "noise" on the lines. Doing both is rarely needed. The shield can even slow down the signal too much on higher speed ethernet, so look at your hub/switch specs to see if it is allowed. In the electro-magnetic world, signals are affected by nearby materials, even the shield.

If you are building into the walls, there is a tendancy to put the data outlets right next to the power outlets. As stated in a previous post, try to keep it further away. Mount them on a different stud from power. I personnally have not had power, phone and ethernet lines affect each other, even when run close. But just for safty reasons, keep data lines away from power lines. Strong magnetic devices like ballists, solinoids and DC motor controllers I have seen bring down networks and crash computers, so avoid at all costs with any wire type!

One idea - using conduit from the boxes to the attic (crawl space, basement or closet) will allow you to re-wire when new technology is available.

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by cowen80194 In reply to Confirming the others

Installing conduit helps to stop staples from being used.

Staples and zip tyes can also do harm to the cable.

J hooks for hangin the cable are the best method to protect the cable and prevent it from EMI noise from balasts.

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UTP for indoor and STP for outdoor

by Jonny Memonic In reply to UTP vs STP cabling

UTP for indoor and STP for outdoor -
UTP is good of indoor networking.
I had a project where we had to link building to building we had a few fiber links before this project from other buildings but the company wanted a very cheap measure. So we had STP cabling ran through PVC from building to building.
It was implemented about 2 years ago and works fine till this day. I would not trust running the wire open tothe elements it may last a long time outdoor but the plastic and metal shielding would mess up a few months. So i would say running it through PVC extends the life of the cable for a longer time.

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