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Old 03-26-2007, 04:57 AM
Bennett Price
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Default Re: USB 2 Maximum Cable Length



Gerard Bok wrote:
> On Sun, 25 Mar 2007 06:10:37 GMT, Bennett Price
> <bjpriceNOSPAM@itsa.ucsf.edu> wrote:
>
>>> You plan on using "UNshielded CAT 5 cable" as a 25 foot USB 2 cable? Well,
>>> I think you'll greatly enjoy the data corruption from the noise interference
>>> your cable will be subject to. Why bother with Standards anyway...
>>>

>> That's why I'm asking. As for Standards, reread what I said about
>> parallel printer and RS-232 serial cables.

>
> Your printer and RS standards operate in the 0.1 Mbps range.
> Do you realy expect the same leniency at 400 Mbps ?
> Or are you willing to wait 6 years for your backup to be complete
> ?
>

But I'm not trying to extend USB 2 cables to 4 or 5 times their spec'd
maximum of 5 meters - 16.5 feet. I need only go about 20-25 feet, less
than twice the spec'd max.

And of course I'm asking because I don't know if it will work. Everyone
points to the spec but so far no one has actually reported trying going
over 5 meters.

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