catt.5 cable

[mulfas]

please tell me what catt.5 cable is or let me know where i can look this up in more detail?

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mulfas

[ixl]

A "CAT5" (for "Category 5") cable is a twisted-pair Ethernet cable used for 100 Mbit fast Ethernet. It is distinguished from older cables (Cat 3?) that were only rated for standard 10 Mbit ethernet.

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Charles M. Kozierok
Webslave, The PC Guide (http://www.PCGuide.com)
Comprehensive PC Reference, Troubleshooting, Optimization and Buyer's Guides...
Note: Please reply to my forum postings here on the forums. Thanks.

[teknicat]

Originally posted by mulfas:

please tell me what catt.5 cable is or let me know where i can look this up in more detail?



Hiya! 8)

Category 5 Cable (unshielded Twisted Pair) its a data cable composed of 8 wires of 4 different colors plus a white & color equivalent: i.e. blue, blue & white, green, green & white, and so on. in normal and slightly modern network configurations, this tipe of cable is used, amongst other things, for the fact that you can use this cable to transfer data across 300 feet (or just under) before requiring to boost the signal.

The sequence in which the pins are put toghether is arranged by a set of standards, which works in conjuction with the speed in which your network runs at.
In slightly old networks, the number of pins used was limited to 6, leaving pins 7 and 8 un used but still part of the plug; now, in modern gigabit networks, they yse the last 2 pins, to give you 125 megabits in each pair of cable, going in both directions at the same time which would equal a total velocity of 250 megabits p/s per twisted pair, which times 4 pairs equals 1 Gbit.

The plug that its used at the end of the cable is called RJ45, which descends from the american telephone jack RJ11.

http://www.PCGuide.com/ubb/smile.gif Hope this helps you http://www.PCGuide.com/ubb/smile.gif

[myone]

I ran through a site that you might want to check out. It has instruction on how to make RJ 45 cables
http://www.duxcw.com/digest/Howto/network/cable/cable5.htm



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[themeekgeek]

Originally posted by myone:
I ran through a site that you might want to check out. It has instruction on how to make RJ 45 cables
http://www.duxcw.com/digest/Howto/network/cable/cable5.htm


thank you,myone,for bringing the dux website to my attention.
i added it to my list & registered.like you,i'm a first timer
too.

[ixl]

Note that unless you are running your own in-building wiring, making your own CAT5 cables probably isn't worth the effort or risk of making them incorrectly. Just buy pre-made patch cables.
Also, the comment on that web site about telephone wires being unsuited for networking is no longer true: there are no products that do use regular phone cables (look for "HomePNA") though these are different from standard Ethernet of course.

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Charles M. Kozierok
Webslave, The PC Guide (http://www.PCGuide.com)
Comprehensive PC Reference, Troubleshooting, Optimization and Buyer's Guides...
Note: Please reply to my forum postings here on the forums. Thanks.

[macellarius]

By the way, there is also CAT 1, 2, 3 & 4 cable...but not easy to find nowadays. Cat 5 is the standard.

[ixl]

There's actually now Category 5E cable, Cat 6, and also several "levels" of a new cabling standard by Anixter. Most of these are "extra" bandwidth allowances for potential technologies in the future, but I believe 5E is recommended for Gigabit Ethernet.

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Charles M. Kozierok
Webslave, The PC Guide (http://www.PCGuide.com)
Comprehensive PC Reference, Troubleshooting, Optimization and Buyer's Guides...
Note: Please reply to my forum postings here on the forums. Thanks.

[David Stanford]

Actually, CAT 5 cables are made from the EXACT same wires as ordinary in-house phone lines, with two big differences:

* more pairs
* more number of twists per inch.

The more you 'twist' 2 wires around each other, the more bandwidth ( and also more cost per inch to produce ). I doubt you would really want to know why, but it has to do with the skin effect, the fact that the higher the frequency, the more of the signal travels on the 'outside', 'skin', of a conductor.

If you wonder how true this is, grab a CAT 5 cable and feel the twists in it. Each of the 4 pairs is twisted together independently.

As someone already stated in the post, and the most important thing, CAT 5 is made for the bandwidth of 100 base T ethernet, or, able to handle a minimum of 100Mbps throughput, per pair.

[This message has been edited by David Stanford (edited 03-03-2001).]

[Reid]

My electronics education taught me that twisting reduces magnetic pick-up almost completely by reducing the loop area of the cable to zero. Twisting the wires causes electric fields to induce common mode signals on the wire. As a balanced system allows only differential mode signals to pass through, these common mode signals are rejected.

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reido@my-deja.com

Friends don't let friends install Windows ME

[daddy o]

I've read recommendations to connect a standard 56k modem to a standard phone jack(RJ11) with CAT5 cable, to help improve the signal, but the jacks are incompatible. Is this possible? I've never seen CAT5 cable with an RJ11 jack.

[Reid]

I have not found RJ11 connectors that would work with CAT5 cable. In my home, all the phone wiring in the wall and the service cable coming in are 4-conductor parallel conductor (non-twisted) cable, so I don't think having better cable on the last 6 feet would matter. I usually get 52k connections with this 30 year old wire, 50k worst case.

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reido@my-deja.com

Friends don't let friends install Windows ME

[bassman]

Hey all,
Cat5 will work in RJ11 plugs. Don't know if you will find them in the store though. As Reid said,"If you are pluging into older Cat3, it wont make any differance".
I bought a crimping tool to put RJ11 and 45 ends on. I did this as it will be one of my required tools for work. A quality one is around $20.
I also ran all Cat5 throughout my house. I notice an improvement but not a lot.
When I get a round toit http://www.PCGuide.com/ubb/biggrin.gif I will turn all this into a network.

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