0O0 wrote:
> use a site survey tool or call in the professional
>
>
>
> "Ian" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed) om...
>
>>As a newcomer to the wireless arena, I'm seeking advice.
>>We have a warehouse which is about 65m x 65m and about 12m high. It's
>
> full
>
>>of steel racking carrying cardboard boxes full of papers. I need to
>>wireless-enable the entire area, preferably using 11g, for use with
>
> wireless
>
>>bar-code scanners.
>>
>>How do I estimate the number, spec. & disposition of access-points? Is
>
> there
>
>>perhaps a site with general guidelines?
>>At the moment I am only interested in a rough estimate for initial
>>budgeting.
>>
>>Any clues gratefully received!
>>
>>Ian
>
>
>
For a simple site survey tool, buy or borrow two WiFi laptops and
set them up in an AdHoc network. Park one laptop where you think
a WAP will be, at the same height where you think you will park that
WAP; then setup the laptop to continuously run a link test with
the other laptop and to display signal strength. Then, walk around
your facility to find where it works; repeat for other WAP locations.
These laptops can use 802.11b or 802.11g, since both use the same
frequency and will produce roughly the same maps.
Since you seem to want distance instead of bandwidth, 802.11b is
probably as good as 802.11g, and may be cheaper. OTOH, if you care
about secure data transfer, you should insist on WPA instead of WEP;
WPA is not used on older equipment and may induce you to choose
802.11g even though the higher peak bandwidth is uninteresting.
Note that range depends on antenna placement, so the signal strength
will vary depending on how you hold the movable laptop and on how you
positioned the base laptop. Accordingly, since it may not be possible
to arrange your barcode scanners to point in the optimal way, you
should plan on more WAPs then the minimal number your mapping
expedition shows you need.
--
Cheers, Bob
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