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RE: xAP - The Proposed Architecture Explained...


  • To: ukha_d@xxxxxxx
  • Subject: RE: xAP - The Proposed Architecture Explained...
  • From: "Paul Gordon" <paul_gordon@xxxxxxx>
  • Date: Thu, 15 Aug 2002 10:06:57 +0100
  • Mailing-list: list ukha_d@xxxxxxx; contact ukha_d-owner@xxxxxxx
  • Reply-to: ukha_d@xxxxxxx

Is it true to say this: (hope the ASCII art comes out OK)

Daisy-chain =
      _       _       _
-----_-----_-----_-----


Whereas Multi-drop =

-----+-------+--------+------
                   
                   
     _       _        _
    _     _      _


And would it also be true to say that electrically, these are effectively
the same? (assuming the devices are passive)

Paul G.




>From: "BUTLER, Tony, FM" <roaming@xxxxxxx>
>Reply-To: ukha_d@xxxxxxx >To: "'ukha_d@xxxxxxx'" <ukha_d@xxxxxxx>
>Subject: RE: [ukha_d] xAP - The Proposed Architecture Explained...
>Date: Thu, 15 Aug 2002 09:57:03 +0100
>
>Thanks Ian,
>
>So the answer is actually "yes the displays _are_ connected in a daisy
>chain
>to the controller"!
>
>Tony
>(Satisfied)
>
> > -----Original Message-----
> > From: ian.bird@xxxxxxx > > [mailto:ian.bird@xxxxxxx]
> > Sent: 15 August 2002 09:36
> > To: ukha_d@xxxxxxx > > Subject: RE: [ukha_d] xAP - The Proposed Architecture Explained...
> >
> >
> > Hi Tony
> >
> > In an RS485 network the term multidrop and daisy chain go
> > hand in hand.
> > Think of a single piece of two strand cable running round the
> > various rooms
> > of the house. When you want to add a device to it you just crimp the
> > connections to the main wires. Note there are no T junctions
> > and as small as
> > possible a neck to the device. Add on loads of devices and
> > you have multi
> > drop. The devices at each end have termination resistors on
> > to stop signal
> > reflections but that is getting techy.
> >
> > HTH
> >
> > Ian
> >
> > Ciba Vision (UK) Ltd
> > Tel:+44(0)1489 775570
> > Fax:+44(0)1489 779570
> > E mail: ian.bird@xxxxxxx > >
> >
> > > -----Original Message-----
> > > From: BUTLER, Tony, FM [mailto:roaming@xxxxxxx]
> > > Sent: 15 August 2002 08:24
> > > To: 'ukha_d@xxxxxxx'
> > > Subject: RE: [ukha_d] xAP - The Proposed Architecture Explained...
> > >
> > >
> > > > > So the displays are connected in a daisy chain to the
> > controller?
> > > >
> > > > No multi drop
> > >
> > > Sorry for being thick here - could you explain multi drop to me?
> > > The only contect I have seen it used in before is in
> > relation to KAT5
> > > modules and a "multidrop" installation there _is_
> > > daisy-chained, 10base-T
> > > style......
> > >
> > > thanks,
> > >
> > >
> > > Tony
> > >
> > >
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