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'[EE]: usb-cables longer than 5 meters... A repeate'
2002\07\03@102814 by so-8859-1?Q?S=F8ren_Knudsen?=

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Hi!

I have just discovered that I cant run a 10 meter long usb cable from my workstation to my desk. Do any of you have a possible solution? Maybe a repeater box or something. I know that stuff like this can be had, but its quite expensive and only supports up to usb 1.1. Can this be built reasonably easy? Would some pullups do wonders or just screw the signal up?

I dont have a clue about what to do. -Do you?

Best regards
Søren Knudsen
@Audiomind.dk

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2002\07\03@105800 by Joe Farr

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Don't know much about USB but what about a USB hub half way. They have electronics in and are powered so I'm assuming must have some ability to shape, condition and boost to some extent the signale and 10 meters dosn't seem that long. There not that expensive either.



{Original Message removed}

2002\07\03@110810 by Amaury Jacquot

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I think you can use about 3 to 4 hubs in a cascade fashion...

Amaury

On Wed, Jul 03, 2002 at 03:55:52PM +0100, Joe Farr wrote:
> Don't know much about USB but what about a USB hub half way. They have electronics in and are powered so I'm assuming must have some ability to shape, condition and boost to some extent the signale and 10 meters dosn't seem that long. There not that expensive either.
>
>
>
> {Original Message removed}

2002\07\03@121412 by Brendan Moran

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> I think you can use about 3 to 4 hubs in a cascade fashion...

The signal degrades a bit each time, though.  You start to lose transmission
speed as you add more hubs or repeaters.  If you need to go further and hold
a high speed, try looking at another protocol.  IEEE1394 might work for you.

--Brendan

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2002\07\03@134755 by Chris Carbaugh

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Black Box part #USBR01-0016 is $31.95 (US)

This cable is 4.8m and buffers all data traffic and boosts signal.
Speed is rated at 12Mbps.  You can chain five of these together for a
24.3m run.

Check out http://www.blackbox.com.

They are great to deal with and tech support is excellent, even prior to
purchase.

Chris


On Wed, 2002-07-03 at 12:15, Brendan Moran wrote:
{Quote hidden}

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2002\07\03@210929 by Bob Ammerman

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This answer is exactly correct. In fact, some companies sell active USB
extender cables which are nothing but a length of wire with a 1-port hub in
the far end.

USB hubs can be stacked up to 4 levels deep (total length = 5 * 5 meters)

Bob Ammerman
RAm Systems

----- Original Message -----
From: "Joe Farr" <spam_OUTjoe.farrTakeThisOuTspamKCSL.UK.COM>
To: <.....PICLISTKILLspamspam@spam@MITVMA.MIT.EDU>
Sent: Wednesday, July 03, 2002 10:55 AM
Subject: Re: [EE]: usb-cables longer than 5 meters... A repeater of some
sort?


Don't know much about USB but what about a USB hub half way. They have
electronics in and are powered so I'm assuming must have some ability to
shape, condition and boost to some extent the signale and 10 meters dosn't
seem that long. There not that expensive either.



{Original Message removed}

2002\07\04@082500 by Bob Ammerman

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----- Original Message -----
From: "Brendan Moran" <bmoranspamKILLspamMILLENNIUM.CA>
To: <.....PICLISTKILLspamspam.....MITVMA.MIT.EDU>
Sent: Wednesday, July 03, 2002 12:15 PM
Subject: Re: [EE]: usb-cables longer than 5 meters... A repeater of some
sort?


> > I think you can use about 3 to 4 hubs in a cascade fashion...
>
> The signal degrades a bit each time, though.  You start to lose
transmission
> speed as you add more hubs or repeaters.  If you need to go further and
hold
> a high speed, try looking at another protocol.  IEEE1394 might work for
you.
>
> --Brendan

This last is NOT true. USB is an all-or-nothing protocol, and if used within
specs should always work at full rate.

Bob Ammerman
RAm Systems

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2002\07\04@085043 by Russell McMahon

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I have a 3 page Intel paper which explains in some detail why you can't do
this :-)


> This answer is exactly correct. In fact, some companies sell active USB
> extender cables which are nothing but a length of wire with a 1-port hub
in
> the far end.
>
> USB hubs can be stacked up to 4 levels deep (total length = 5 * 5 meters)

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2002\07\04@105049 by Bob Ammerman

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----- Original Message -----
From: "Russell McMahon" <@spam@apptechKILLspamspamPARADISE.NET.NZ>
To: <KILLspamPICLISTKILLspamspamMITVMA.MIT.EDU>
Sent: Thursday, July 04, 2002 8:49 AM
Subject: Re: [EE]: usb-cables longer than 5 meters... A repeater of some
sort?


> I have a 3 page Intel paper which explains in some detail why you can't do
> this :-)

Please post URL or send to me via direct email. I am always looking to
increase my knowledge.

Bob Ammerman
RAm Systems

>
> > This answer is exactly correct. In fact, some companies sell active USB
> > extender cables which are nothing but a length of wire with a 1-port hub
> in
> > the far end.
> >
> > USB hubs can be stacked up to 4 levels deep (total length = 5 * 5
meters)
>
> --
> http://www.piclist.com#nomail Going offline? Don't AutoReply us!
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>
>

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2002\07\04@105544 by Michael Rigby-Jones

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> > This answer is exactly correct. In fact, some companies sell active USB
> > extender cables which are nothing but a length of wire with a 1-port hub
> in
> > the far end.
> >
> > USB hubs can be stacked up to 4 levels deep (total length = 5 * 5
> meters)
>
       {Original Message removed}

2002\07\07@001605 by so-8859-1?Q?S=F8ren_Knudsen?=

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Thanks to all for the good advice's. I think I will look into getting a usb hub to go in middle of my pc and dekstop, though its a bit large for the task. I looks to be a hole lot cheaper than those "reapeater" type hubs (of course - as its potential userbase is much bigger).

Regards,
Soren Knudsen

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