> On Sat, 20 May 2000, Richard Hole wrote:
>
> The USB spec only allows for up to 5 metres of cable, you'd be much better
> off using an ethernet based camera such as one from axis or a similar one
> from another manufacturer which will give you much more flexibility
>
Please note that the USB spec 2.0, section 4.1.1 still has a star
tiered topology. Signaling characteristics limit the total length of
the cables and so in section 7.1.1 the spec shows a worst case
scenario of 6 cables, 5 hubs, and a device. Using 6 cables * 5M/cable
should provide 30M. 5 metre is within the limit of a single cable,
and can be used hub to hub, but it is not the total overall limit.
Using this many hubs and cables is certainly an ugly solution
for his application, and he is well advised to find an alternative,
regards,
gm
> > Hi
> >
> > I have a USB web cam which I am thinking of using as a weather
> > camera about 40 meters or 130 feet away from the computer. The
> > camera can only work with up to 30 meters of the cable
> > provided.
..snip
> > Your help will be appreciated
> > Regards Richard
> >
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