Re: Connecting SCT to desktop

From: Robert Sheaffer (rtenore_at_pacbell.net)
Date: 10/07/04 

Date: Thu, 07 Oct 2004 06:39:00 GMT

If you run Ethernet to the remote location, and put a low-cost hub
there, a single ethernet cable will enable you to control several
devices.

Although a remote desktop is probably more flexible....

    Robert Sheaffer

Roger Hamlett wrote:

>
> "Dennis Allen" <dennis@dennisallen.com> wrote in message
> news:10m5d1f1hjf3r2a@corp.supernews.com...
> > Well, the serial/parallel ports on the laptop are used, but
> > we could use the USB to do ethernet (see
> > http://store.yahoo.com/priceshock/smc2206usbeth.html )
> >
> > Question. Could we controll the telescope directly with one
> > ethernet cable and run the web cam with the other? We have two cat5
> > lines...Dennis
> You'd end up spending a lot more, more, and probably having more problems
> than just using remote desktop to control the laptop over one ethernet
> cable with the USB-Ethernet adapter.
> However one key question is whether the USB port is USB1.1, or USB2. If it
> is USB1.1, then your ethernet 'rate' will be limited by the USB speed to
> only 12Mb/sec (and in practice a lot less than this). Now this can be
> unacceptably slow when using remote desktop, with a reasonably large
> colour depth, and image size. Generally, a PCMCIA network card will give
> much better performance, in this case, and would be the 'better' solution
> (you do not mention PCMCIA ports on the laptop, but it should have at
> least one such port). If the USB port is USB2, then the performance should
> be fine, but I'd still prefer a PCMCIA card if possible!.
> USB, is still to my mind a bit of a 'dog'. It is perhaps worth reflecting
> why there have been five different releases of USBport driver for XP so
> far released. Unfortunately to keep the cost of peripherals down, USB cut
> corners, and while on some combinations will work fine, it can at times be
> a pig....
>
> Best Wishes
>

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