Critical Systems & ISM (was RE: [MLB-WIRELESS] Wireless 'cloud' may offer silver lining Or is it just 'pie-in-the-sky' technology?)

[lkhoo at csc.com.au]

>Speaking of this, has any one noticed the antennas on top of a lot of
>traffic lights recently??

>I can't think of any specific intersections at the moment, but I've seen
>some.

Yes! I've seen them everywhere and i've always wondered what they were!
They are everywhere in the city. From memory I think there is one on the
corner of Collins and Queen? Opposite the book shop.

I saw one yesterday day and it looked like a jumbo omni (~ 3m+ high).

I actually found that one of my sites had a heap of wireless stuff
installed and I couldn't even tell without really looking for them. They
had really small flat panel antenna's. They were about 2cm x 10cm x 5mm and
were placed on the corners of hall ways etc. These were then hooked into
near by AP's.

Lucas



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|---------+---------------------------------->
|         |           "Jason Clarke"         |
|         |           <midwaym19 at ozemail.com.|
|         |           au>                    |
|         |           Sent by:               |
|         |           owner-melbwireless at wire|
|         |           less.org.au            |
|         |                                  |
|         |                                  |
|         |           05/08/2002 11:12 AM    |
|         |                                  |
|---------+---------------------------------->
  >----------------------------------------------------------------------------------------------------------------------------|
  |                                                                                                                            |
  |        To:      <melbwireless at wireless.org.au>                                                                             |
  |        cc:                                                                                                                 |
  |        Subject: Re: Critical Systems & ISM (was RE: [MLB-WIRELESS] Wireless  'cloud' may offer silver lining Or is it just |
  |        'pie-in-the-sky'  technology?)                                                                                      |
  >----------------------------------------------------------------------------------------------------------------------------|




Speaking of this, has any one noticed the antennas on top of a lot of
traffic lights recently??

I can't think of any specific intersections at the moment, but I've seen
some.

> There are many critical systems that operate ISM band gear. Your local
> Hospital is full of it. The Military use it too, amongst many other
> Government organisations. Yes, they must all be prepared to receive
> intinerant interference, however if due to poor engineering of another
> system, OR deliberate interference, then its a problem not neccesarily
> (sp?)for the system being interfered with.
> IF a Hospital receives continual interference, it will be investigated if
> they complain. Luckily for us, our wireless population density will
> probably never get as bad as the U.S. That means our interference
problems
> should be
> rare....with a bit of luck :-).

And planning :-)


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