[wplug] Good hubs and what not.

[Vincent DiAngelus]

The catch is that Cat3 and Cat5 cable is built almost exactly the same. Cat5 has passed more testing and might have better twists per inch. One reason you got 10Mbs to run on Cat3 is that "most" cable manufact. have dummped their Cat3 production and have started labeling Cat5 with the 3 label. It saves them $$ in the long run.
According to the standard you should not get 10Mbs over true Cat3. Cat4 is no longer recog. as any type of standard. And the Highest level of Proformance is now a "Cat7" solution. It has not been recogonised as a true standard by EIA/TIA (neither has Cat6) but vendors already sell it as such. Most manufact. say their cable (Cat5) will run Gigabit ethernet.
But most of this is just silly to think about as far as home networks go. All you would need for use at home would be a simple cat5 cable, and the proper connectors. Almost anything oyu do to the cable would not prevent it from sending a signal (true catagory proformance or not) from one computer to the hub/switch to your other computer. So if your not worried about true catagory proformance, or the manufacturers warrenty, then don't worry about it.
Good Luck,
 
  Jason McCormick <jason at packetwarriors.net> wrote: 
The differences between categories of wire are the quailty of copper, the 
twists per inch and other cross-talk elimination features. Category 3 
cannot run 100Mpbs ever. If you did get it to 100Mbps then you've got some 
super-high quality wire and a very error-prone/accepting hub. Even at that 
point I'd doubt that it'd run 100Mpbs reliably. CAT5 does 100Mpbs full-
duplex with no problem. CAT5e will do Gigabit ethernet, but not terribly 
reliability. Categoy 6 Level 7 is the current highest-bandwidth cable 
that's available. Cat6L7 is actually a proposed final standard for Cat7. 
It has a + shaped plastic sheild to prevent cross talk as well was very 
tightly twisted wires.

- Jason

> Ummmm...No you can't. CAT 3 maxes at 10Mb (has something to do with the
> way the wires are set up when you crimp it). CAT5 can run 100Mb, but
> can't run Gigabit-E reliably.
> 
> -Ed
> 
> Edward C. Smith
> Multimedia Programmer
> Interactive Media Corp.
> Butler, PA
> (724) 284-7396
> 
> 
> -----Original Message-----
> From: Ed Aiken Jr [mailto:eaiken at home.com]
> Sent: Friday, January 12, 2001 12:24 PM
> To: wplug at wplug.org
> Subject: Re: [wplug] Good hubs and what not.
> 
> 
> You can run 100MB on CAT3! 100BT4 can use CAT3, CAT4, or CAT5 and ALL
> four pair.
> 
> On Thu, 11 Jan 2001, Rob Nelson wrote:
> 
>> >rob he's right. and so are you. you cable will still work, but it
>> >wont qualify for cat 5. the things he listed above are standards. if
>> >you don't want to adhere to them thats fine, and it may be fine for
>> >home lans. 
>> 
>> Yes and no, cause 100MB will not run on cat3.
>> 
>> Rob Nelson
>> ronelson at vt.edu
>> 
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> 
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Vincent DiAngelus

WESCO Distribution

Datacomm Specialist

412-688-1074



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