Licensed 70 to 80 GHz actually has less oxygen absorption of the signal
than 60 GHz (by several orders of magnitude). If you are providing a
Service Level Agreement with 5 - 9's or better % uptime then you should
stick with a licensed product IMO. As Matt states below, both companies
offer a licensed product. Depending on the rainfall annually where you
are deploying you may get nearly the same uptime in 60 GHz, especially
since it is just 0.4 miles. I would research before making a choice
though if uptime requirements are strict.
Remember to make sure you research your connection into the network
also. Your point of demarcation will need to be identified. In many
cases it is a port from the switch that you would provide. Make sure you
select a switch compatible with the radio product you launch. If they
provide the switch demarc point then make sure it is on the list of
tested and known good hardware for connecting to the link you setup.
Before quoting the product make sure you remember things like back-up
power, downlead selection, surge and lightning suppression, stand-by
spare radios for replacement, etc. Ask to see the software management
interfaces for the radios being considered. If you buy radios that work
but you cannot diagnose what is wrong when they break then you have a
problem. It is not like you will have a 60 to 90 GHz signal meter or
spectrum analyzer anytime soon so the software management interface is
very important. If you do not address these things now then you will be
sorry later.
If I were you I would at least get a quote or two from fiber
construction companies to see if a fiber could be built for same or less
money. Depending on the location this might be the more efficient solution.
That is the biggest beef I have with the millimeter-wave crowd right
now. They try to think in terms of how much money they can squeeze out
for each single link sale instead of looking at the mass potential if we
could all get our hands on low-cost Gigabit backhaul to all of our
towers. Ken and I have been beating this into their brains now for a
couple of years. It will sink in someday when they think it is their
idea. :-) jk
Scriv
Matt Liotta wrote:
We deploy BrideWave gear and have been happy with it. BridgeWave also
has a licensed radio operating in the 80Ghz range.
-Matt
Mario Pommier wrote:
This is a new area of wireless deployment for me:
I've been asked to quote for a gigabit wireless link between a
radiology department and a nearby hospital (0.4 miles).
I'm aware of two options so far, and here's some info I've gathered:
-- BridgeWave - 60Ghz; unlicensed; $25,000 complete link; ~$6,000
5-year hardware warranty; 1Gbps
-- GigaBeam - 70/80Ghz; licensed; $37,000 complete link (includes
$1,000 10-year license); $0.00 5-year hardware warranty; 2.7Gbps
release by Dec. 2006.
I know Bob Moldashel said he has installed the Bridgewave.
Anyone care to comment on any experience you've had with these
companies?
Thanks a lot.
Mario
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