RE: Re: Radio networking...

["Brian G. Reynolds" <brian.g.reynolds@xxxxxxx>]

Thanks once again for the reply's......sorry also for the delay, just got
in from work!

B.

-----Original Message-----
From: james_dunn67 [mailto:james.dunn@xxxxxxx]
Sent: 06 May 2003 23:36
To: ukha_d@xxxxxxx
Subject: [ukha_d] Re: Radio networking...


Brian,

By "public" I mean the sort of organisation that would want to do
things legally and not end up having to turn the thing off (or even
face a fine) because the UK Radio Authority come 'round when someone
has complained that you are interfering with their equipment.

You may well get away with more than 100mW EIRP without anyone
noticing or complaining, particularly if you have mostly agricultural
land along the line of sight as few people are likely to notice.

If you play around with the spread sheet and use lower data rates,
you can achieve some useful link speeds.

Cheers,

James

--- In ukha_d@xxxxxxx, "Brian G. Reynolds"
<brian.g.reynolds@n...> wrote:
> Sounds interesting...if interesting is the correct word to use...
>
> The School in question is a public school, is this any different?
>
> I will be passing this onto the boss tomorrow.....
>
> Thanks,
>
> B.
>
> -----Original Message-----
> From: james_dunn67 [mailto:james.dunn@xxxxxxx...]
> Sent: 06 May 2003 22:33
> To: ukha_d@xxxxxxx
> Subject: [ukha_d] Re: Radio networking...
>
>
> Brian,
>
> Since it looks like you're doing this for a public body, you should
> be aware that you need to keep within 100mW (20dBm) EIRP (effective
> isotropic radiant power).
>
> To reach 2km with a good signal level, you are very likely going to
> break the UK maximum permited RF power levels unless you buy some
> very fancy high gain aerials.
>
> See:
>
> http://www.cisco.com/warp/public/102/wlan/faq-hardware-us-calc.xls
>
> For a good design reference.  (Don't forget to set the regulatory
> domain to ETSI)
>
> Other manufacturers may have slightly more sensitive radio kit than
> Cisco to improve the range but I doubt if they'll be significantly
> different.
>
> Sorry to be a spoil sport.
>
> Regards,
>
> James
>
> --- In ukha_d@xxxxxxx, "Brian G. Reynolds"
> <brian.g.reynolds@n...> wrote:
> > I have been asked to sort a wireless connection to a School just
> under 2km away.
> >
> > I know some people a while back suggested various kit and
supplier,
> could someone enlighten me please?
> >
> > Not sure if a "Pringles" can will look too
professional......
> >
> > Thanks,
> >
> > B.