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backhaul wireless

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Robert

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Oct 1, 2002, 5:49:04 AM10/1/02
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Hi

I have been readin alo about 802.11 etc , and the setups which various
communities in the US have made.

I am looking at rolling out a WMAN, covering several thousand
buildings, this would allow public wireless access, together with
tagretted hotspots, the typical hotels etc model.

However looking at this model I have come up against one major hurdle,
and that is backhaul, the model only seems to work with wireless
backhaul. I cannot seem to find much information or models where this
has been used, except one in Minn.
including hardware vendors who provide assistance with this.

My questions are simply :-

1. how far can you backhaul on wirless
2. what is the redundancy model on it
3. how much data etc

If anyone has any cool pointers for this, I would sleep a happy ma :-)

Rob

K Bloch

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Oct 1, 2002, 11:36:03 AM10/1/02
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Backhaul wireless is very common. There are many products available in
both licensed and unlicensed bands. Western Mux makes some good
equipment in thier Tsunami Line. There equipment has data rates up to
480 mbits per second full duplex. As far as redundancy installing two
systems on the same path can be the way to go. Using two lower
capacity systems with an etherchannel setup can acheive redunduncy.
The tradeoff is is one system goes down the bandwidth is reduced in
half. Distance can easily reach 25 km on a properly designed system
with a good fade margin. This assumes there is line of sight betwwen
the end points.

A word of caution in trying to do anything cheap. The average consumer
may except a flaky connection for a while until, something better
comes along but a business won't. A commercial system needs to be
designed for a five nines availability. Anything less then this will
meen a very high churn rate on customers.

Cost may be a big factor. A wireless backhaul system is not cheap.
Trying to sell access over a 802.11 backhaul will probably fail in the
long run. Using equipment that is so cheap as to make it common will
render the spectrum unusable for most long distance links.


sti...@yahoo.co.uk (Robert) wrote in message news:<fc6b35a7.02100...@posting.google.com>...

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