RE: Extending USB Connections

["Mark Harrison" <Mark.Harrison@xxxxxxx>]

How much?????
=20
Come on Keith :-)

Mark Harrison=20
Head of Systems, eKingfisher=20

-----Original Message-----
From: James, Daniel [mailto:daniel.james@xxxxxxx]
Sent: 6 December 2001 11:33
To: 'ukha_d@xxxxxxx'
Subject: RE: [ukha_d] Extending USB Connections


Just found this
=20
Looks like someone have beaten you to making KUT5 :-)
=20
http://www.usbstuff.com/icron.html
<http://www.usbstuff.com/icron.html>=20
=20
I'll try messing around with some USB cabling at some point over
Christmas.
=20
Cheers
=20
Dan

-----Original Message-----
From: Keith Doxey [mailto:ukha@xxxxxxx]
Sent: 06 December 2001 11:31
To: ukha_d@xxxxxxx
Subject: RE: [ukha_d] Extending USB Connections


Instead of spending more money on a camera, why not buy a couple of USB
connectors and make a lead.
=20
=20
PC USB_Plug (A&B) RJ45 ---------CAT5---------RJ45(A&B + Local 5V
input)USB_Socket <Webcam
=20
Keith
=20
PS. Dont blame me if it doesnt work !

-----Original Message-----
From: James, Daniel [mailto:daniel.james@xxxxxxx]
Sent: 06 December 2001 11:25
To: 'ukha_d@xxxxxxx'
Subject: RE: [ukha_d] Extending USB Connections


Umm.. thanks for this Keith
=20
I might look at buying a cheap (=A320) camera and pulling it to bits
then..
=20
Dan
=20
=20

-----Original Message-----
From: Keith Doxey [mailto:ukha@xxxxxxx]
Sent: 06 December 2001 11:23
To: ukha_d@xxxxxxx
Subject: RE: [ukha_d] Extending USB Connections


I would be tempted to try USB over a longer distance.
=20
I believe the main limitation is in the pair of wires feeding the power.
USB has 4 wires +5v, 0v, A & B. A and B are the data pair, as long as
you used a local power supply at the distant end it might work OK. As I
understand it, the actual DATA is carried as a balanced RS485 type
signal so should be good for quite a long distance over CAT5.
=20
Of course, I could be talking B******* as I have never played with USB.
=20
I cant test this theory as I dont own any USB kit.
=20
Keith

-----Original Message-----
From: James, Daniel [mailto:daniel.james@xxxxxxx]
Sent: 06 December 2001 11:04
To: 'ukha_d@xxxxxxx'
Subject: RE: [ukha_d] Extending USB Connections


Excuse the blonde question :-)=20
=20
but why is their such a limitation on the length of cable for USB? - do
they use very low voltages for their signalling, and as such this would
deteriorate over any distance - say 15 metres?
=20
<Whinge mode>
It just seems such a waste, that I can buy a reasonable colour web cam
for under =A350 and I could then have more than one connected to my pc,
that they would all have to be within a few metres of node Zero!!
</Whinge mode>
=20
=20
Daniel (throwing his toys out of the box!!)
=20

-----Original Message-----
From: Andy Laurence [mailto:andylaurence@xxxxxxx]
Sent: 06 December 2001 11:00
To: ukha_d@xxxxxxx
Subject: Re: [ukha_d] Extending USB Connections


> Erm, I didn't think that was what USB / Ethernet adaptors did!

Most don't , but I'm sure there's some that do ... somewhere ...

> They're there to give a PC a network connection using a USB port
rather
> than a PCI or an ISA one.
>
> In order to extend the camera, Dan would need the CAMERA to be able to
> load the device drivers for the USB network card, if you see what I
> mean.

yeah, gotcha.

> Am I wrong here? Are there, in fact, USB extenders that work over
> Ethernet???

I'm sure I've seen them around, but I've no idea where.  Perhaps someone
else has?

Andy
--
PC-Based Multimedia System - now working!
http://www.andylaurence.pwp.blueyonder.co.uk/pcbmms
<http://www.andylaurence.pwp.blueyonder.co.uk/pcbmms>=20


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