looking for wireless packet system on _non_ 802.11 freqs

Situation: using a computer in front of an audience, many
of whom are carrying/using 802.11 computers or phones.

The problem is that this saturates and overloads the wireless
network, making it just about impossible for the lecturer
to get decent access.

I've tried putting the presneter on a passord protected
"channel 1" circuit, and moved the public one to 11,
but there's still enough interference to be troublesome.

We can't (easily) use wires, nor powerlines.

So... I was thinking of getting a pair of transceivers,
one at the computer desk, the other at a router, which
are on a different frequency all together. If low
power (and on the right frequencies) they should be
ok without an FCC license.

So I was looking around and couldn't really find anything
that looked promising.

Any suggestions? Thanks.

Any suggestions?

--
__________________________________________________ ___
Knowledge may be power, but communications is the key
(E-Mail Removed)
[to foil spammers, my address has been double rot-13 encoded]

On Sun, 16 Jan 2011 05:55:18 +0000 (UTC), danny burstein
<(E-Mail Removed)> wrote:

>
>Situation: using a computer in front of an audience, many
>of whom are carrying/using 802.11 computers or phones.
>
>So... I was thinking of getting a pair of transceivers,
>one at the computer desk, the other at a router, which
>are on a different frequency all together. If low
>power (and on the right frequencies) they should be
>ok without an FCC license.
>
>Any suggestions?

If the idea is to get away from the 2.4GHz band, what about 802.11a on
the 5GHz band, or perhaps go down to 900 Mhz? Neither of those require
an FCC license.

On Sun, 16 Jan 2011 05:55:18 +0000 (UTC), danny burstein
<(E-Mail Removed)> wrote:

>Situation: using a computer in front of an audience, many
>of whom are carrying/using 802.11 computers or phones.
>
>The problem is that this saturates and overloads the wireless
>network, making it just about impossible for the lecturer
>to get decent access.
>
>I've tried putting the presneter on a passord protected
>"channel 1" circuit, and moved the public one to 11,
>but there's still enough interference to be troublesome.
>
>We can't (easily) use wires, nor powerlines.
>
>So... I was thinking of getting a pair of transceivers,
>one at the computer desk, the other at a router, which
>are on a different frequency all together. If low
>power (and on the right frequencies) they should be
>ok without an FCC license.
>
>So I was looking around and couldn't really find anything
>that looked promising.

You're obviously using 2.4GHz 802.11b/g. It's a rather crowded band.
I did a site survey at a customers house the overlooks the city. My
sniffer showed about 70 wireless systems.

Look into getting a 5.7GHz 802.11a system. You have 12
non-overlapping channels to choose from and minimal appliance
interference (microwave ovens, TV security cameras, TIVO, etc). You
will hear some cordless phones, but they tend to stay at the bottom of
the band.

If you want to be totally evil, find some older frequency hopping
spread spectrum 802.11 gear (i.e. Breezecom, Raylink, old Symbol,
etc). When confronted with interefernce, these just slow down, unlike
802.11b/g which grinds to a halt. The catch is that you won't go very
fast. Maybe 3Mbits/sec at best.

Rather than a 2nd access point and client radio, it's much easier to
get a dual band 802.11a/b/g 2.4/5.7GHz access point or wireless
routers.

There is also some equipment on 900MHz but it's not very common.
<http://www.ubnt.com/sr9>
and also has interference problems.

If you wait long enough, the FCC will eventually release "white space"
rules, so that chip manufacturers can produce chipsets, and
manufacturers can produce products. These will work in the unused
areas between TV channels.

--
Jeff Liebermann (E-Mail Removed)
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558