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RE: xAP - The Proposed Architecture Explained...
Hi robert,
The main focus is currently to get the protocol working, and look at
basic hardware implementations.
"we've" already got wokring software and hardware, pretty good
going for
less than 4 day work.
S
On Thu, 2002-08-15 at 11:05, Robert Chasmer wrote:
> Paul Gordon [mailto:paul_gordon@xxxxxxx] drew:-
> > Whereas Multi-drop =
> >
> > -----+-------+--------+------
> >
> >
> >
_
_ _
> > _
_ _
> >
> > And would it also be true to say that electrically, these are
> > effectively the same? (assuming the devices are passive)
>
> Ok, love the ascii art, but I'm starting to loose focus on the
current
> hardware plan. Lots of things have been discused, RS232, RS423,
IP, On Wire
> etc, but I'm not sure where everything COULD fit in. Is each
display going
> to join the IP network with its own address? Are we going to have a
single
> Controler that forms the link between all the devices and a single
IP
> address? Or a single PC that does all the grant work with as any
RS232
> points as required?
>
> The one idea I don't like is that we will be broadcasting messages to
the
> whole network eg x.x.x.255, regularly for the displays to
operate. I
> appreciate that this would easily allow several machines/devices
with
> different IP addresses to recieve and process display messages but is
this
> really neccessary. I know that the size of messages should be
low etc. but
> thats not really the point.
>
> In a mad attempt to try and guess the current state of play I'll try
my own
> bit of ascii art (DISCALIMER THIS IS PROBABLY ALL WRONG!)
>
> ========++===============================++==== IP Network (Cat 5)
>
> +------++----------------+
+----------++-------------+
> Display Controller PC 01
(Mail, News, Temp,
> Recieves Disp Messages Weather) Sends Messages
.. Other PCs
> at 192.168.10.20:1739 to
192.168.10.20:1739
> or 192.168.10.255:1739 or BCast 192.168.10.255
> +--------------+---------+
+-------------------------+
>
>
> ========+=======+=======+===============+====== RS423 (Could be Cat
5)
>
> [423/232]
[423/232] [423/232]
>
> +----+----+
+----+----+ +----+----+
> RS232
RS232 RS232
> Disp 01 Disp 02
Disp 03
> +---------+
+---------+ +---------+
>
> I Look foward to the website that Mark mentioned, and some working
protypes
> on display so to speak.
>
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