Will some one elaborate on the importance of using shieled cable 1

[Snapper]

Please explain the importance of using shieled cable for wireless network installations. Explaing the possible difficulties we may experience. Thanks in advance.

Attitude is everthing.
-Snapper

 

[jimbopalmer]

I suspect you are being mislead:

1) there are no Ethernet standards that call for or even allow shielded cable

2) both Cat5e and Cat 6 (as well as all previous categories) specify Unshielded Twisted Pair

3) Token Ring used some Shielded cabling schemes 'back in the day'

4) all twisted pair Ethernet uses a differential signaling scheme that minimizes the enfluence of external signals.

5) in those settings where exteranl signals are strong enough to disrupt twisted pairs, use the fiber ethernet standards. (Someone was concerned with networking an MRI machine that contains huge magnets)

6) Wireless Ethernet is limited to less than 1 watt of power, not a large source of disturbance.


I tried to remain child-like, all I acheived was childish.

 

[smegecki]

1) there are no Ethernet standards that call for or even allow shielded cable

WHAT DOES THAT MEAN?

HERE IS A SITE THAT SELLS BOTH SHIELDED CAT 5E PATCH CABLES AS WELL AS CABLE. tHE STANDARDS DONT DETERMINE WHETHER YOU USE SHIELD OR NOT THE ENVIRONMENT DOES.

5) in those settings where exteranl signals are strong enough to disrupt twisted pairs, use the fiber ethernet standards. (Someone was concerned with networking an MRI machine that contains huge magnets)

iF IT'S A SHORT RUN (under 90 meters) THERE IS NO NEED TO INSTALL FIBER. iT WOULD COST MORE THAN SHIELED TWISTED PAIR. IT IS ALSO POSSIBLE TO PUT STANDARD TWISTED PAIR IN AN EMT (electrical metallic tubing)to block the EMI (electo magnetic induction).

I spent a year at the pentagon after 9/11 (i'm glad to be outta there now) to rebuild their voice and data infrastructure. We used sheilded cat5e cable for both voice and data as well as fiber. Distance is the main concern when determining using fiber or not. You should be just fine using sheiled cat5e.

 

[smegecki]

Whoops i forgot to post the site.

http://www.controlcable.com/products/43066614.html

There are many others as well

 

[Bobg1]

1) there are no Ethernet standards that call for or even allow shielded cable"

Hmm, Ever been to europe?

 

[franklin97355]

How about ethernet over coax?

 

[jimbopalmer]

franklin, You are correct. I meant to say that there are no current twisted pair standards for ethernet that call for or even allow shielded twisted pair. Coax does have a drain.

A great deal of non standards based shielded twisted pair is used, and there WILL be a shielded pair Cat 7 for ethernet, but so far as I know, there is no standard for shielded pair ethernet now.

I tried to remain child-like, all I acheived was childish.

 

[franklin97355]

Jimbo, I knew that, just pulling your chain

 

[orypecos]

Shielded is always better than twisted pair, but do u need shielded? Twisted pair relys on interferance canceling out itself, where shielded is based on grounding out the interferance to keep it from getting to the wires within.