[MLB-WIRELESS] Re: Critical Systems & ISM

[Ryan Abbenhuys]

Could it perhaps generate more noise when there's actually a conversation happening?



>Funny this should come up, because I did some testing last week with this.

>
>Using netstumbler on a enterasys card with an average connection to an AP
>(ie around 60%-70% link quality), I stuck my panasonic 2.4Ghz phone right
>next to the card and took it off hook. It barely added 3dB to the noise
>figure and had no impact on the link quality! Also didn't seem to matter
>what channel I used either.
>There was also no noticable change in quality on the cordless aswell.
>
>Whats the moral of this story??? I don't know, just thought u guys might be

>interested.
>
>Darren Dreis
>Vice President
>Melbourne Wireless Inc.
>vicepresident at wireless.org.au
>http://www.wireless.org.au
>
>
>
>
>                                                                          
                              
>                    Radio Tech                                            
                              
>                    <radio at dodo.com.au>             To:     melbwireless at wireless.org.au
                
>                    Sent by:                        cc:                   
                              
>                    owner-melbwireless at wirel        Subject:     [MLB-WIRELESS]
Re: Critical Systems &   
>                    ess.org.au                      ISM                   
                              
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>                    05/08/2002 12:20 PM                                   
                              
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>At 11:22 AM 8/5/02 +1000, lkhoo at csc.com.au wrote:
>>>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
>
>It would be interesting to "see" just what the band occupancy is like,
>with a Spectrum Analyser. I also suspect lots of in house cordless phone
>networks using proprietory protocols are on 2.4GHz too.
>It would be great to snoop the whole bandwidth to see whats going on :-)
>
>Jack
>Rockhampton
>
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