> Out of sheer curiosity, can anyone explain why a USB extension cable
> is "illegal" under the USB specifications?

My guess:

1. cables up to the maximum length are legal, longer are illegal. An 
extension cable can create longer cables.

2. a connector is always a discontinuity. the spec has to take two such 
discontinuities into account, an extension cable would add a third (and 
a fourth, etc).

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Wouter van Ooijen

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Van Ooijen Technische Informatica: www.voti.nl
consultancy, development, PICmicro products
docent Hogeschool van Utrecht: www.voti.nl/hvu

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