Getting the licence (light license) can be done more or less overnight. You
pay a one time $1500 national license fee before you can directly order
licenses, or you pay someone with a national license to pull it for you
cheap. The individual link licenses are super cheap.
However, I warn heavilly against using 60-80Ghz wireless, unless its
absolutely necessary to ahve 1gb of throughput. People that use 80Ghz will
swear behind it, to protect their purchasing decission. When its working,
its working well. But there are many negatives to using it compared to say
18G-24Ghz gear. Not only are 80Ghz gear expensive still 2-3 times that of
18G-24Ghz, but it can be more costly to troubleshoot. Its hard to tell when
a problem is a bad radio versus a radio that moved, or interference. People
incorrectly think that millimenter wave does not have interference. A
millimeter wave is highly refelective, and can actually go for many miles.
The short distances claims are based mostly on rain fade. Millimeter wave
also requires much more links in daisyy chained to gain longer distances,
which brings in a higher probabilty of failure than a single radio to go
that distance. Most miilimeter wave manufacturers boast their 9 reliabilty
one 9 higher than it can actually deliver. Meaning you engineer for 4-9 and
you get 3-9. I'm not saying that millimeter wave is not a good thing, I'm
jsut saying that 24Ghz-18Ghz can usually offer a better value proposition.
Very few people need over 300mbps, easilly doable by 18G-24Ghz. If a
customer only needs less than 300 mbps, why not sell them a 300Mhz link that
is super reliable, instead of a 1Gb link that they'll never use the
potential of and have lots of maintenance issues? Plus what good does it do
to have a last mile link (less than a mile) thats faster than the backhaul?
Think about it, whats going to happen when you suspect a $30,000 GB radio is
bad? Do you think they'll jsut send you a $30,000 radio over night? Are you
going to keep a $30,000 spare on the shelf? Or pay a huge maintenance
contract fee?
60-80Ghz gear has lots of potential for the future, but most of the
manufacturers are still somewhat delusional, on its value, and over charge.
I recommend looking into Licensed 11-24Ghz such as Dragonwave, Trango, or
Cablefree for better value.
We see a big need for 60-80Ghz for last mile links, that are for end user
buildings. But for backbone, its still a bit risky.
Tom DeReggi
RapidDSL & Wireless, Inc
IntAirNet- Fixed Wireless Broadband
----- Original Message -----
From: "Jake VanDewater" <[EMAIL PROTECTED]>
To: "WISPA General List" <wireless@wispa.org>
Sent: Monday, December 10, 2007 8:49 AM
Subject: RE: [WISPA] Wireless Backhaul options/test/results
Has anyone worked with the 80GHz licensed or 60GHz unlicensed gear from
BridgeWave? They claim to be able to get the license work done pretty cheap
in roughly 5 days.
Thoughts?
From: [EMAIL PROTECTED]
To: wireless@wispa.org
Subject: RE: [WISPA] Wireless Backhaul options/test/results
Date: Sun, 9 Dec 2007 23:47:13 -0600
Hello Cameron,
As good as Alvarion gear is or may be, it is still best effort gear and
not
committed rate. Many factors will play into what an end user will
actually
be able to produce across Alvarion gear.
If you are looking for a committed rate backhaul you need to look at the
Trango GigaLINK gear again. Completely different class of hardware than
the
VL backhaul products. Yes, it will cost more, but the saying holds true;
you get what you pay for. Your 3mile link is a cake walk for 18GHz and if
you have the tower space for 6' antennas the 6GHz GigaLINK is perfect for
your 20 mile link.
BTW Ralph, our tests on the bench with VL between two MikroTik 3GHz
routers
was decent in HDX. Problem we saw was went you started pushing data
heavily
in both directions the link all but fell apart. Not what you need to have
happen on a critical backhaul. <grin>
Best,
Brad
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of ralph
Sent: Sunday, December 09, 2007 11:12 PM
To: 'WISPA General List'
Subject: RE: [WISPA] Wireless Backhaul options/test/results
Funny you should ask. I tested a B-100 going 500 feet with Qcheck a couple
of days ago and got only 38 Mb.
I'm not sure if Qcheck reads out correctly or if I have to double it- I
was
in a hurry.
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of [EMAIL PROTECTED]
Sent: Sunday, December 09, 2007 11:12 PM
To: wireless@wispa.org
Subject: [WISPA] Wireless Backhaul options/test/results
Hello all,
I am in the need of upgrading some backhauls. We are currently using
Alvarion AUVL units with a SU-54-BD. According to Alvarion, this link is
only capable of 16mbit each way (Alvarion, please call it a 32mbit radio.)
We have looked into results on users who use Alvarion B100, Trango Link
45, etc..
We are open to all options...As long is it works very well. The link is
about 3 miles, but we have another link that is causing the need for the
upgrade that is about 20 miles.
Trango has licensed gear in the 6ghz and 18ghz line that is very
impressive, but just too expensive for us right now.
I would like to know if people are using B100 what is the up/down max
throughput that you have seen? 50/50? etc.. Are you running VoIP over
this? Alvarion claims 1000 concurrent calls over this link, i'm sure many
of you have not even dented this number.
I am growing to be a big fan of Trango, but have been well, but their
packet per seconds is a lot less than Alvarion B gear at almost 40,000
compared to trango at around 10,000.
Thanks,
I man in dire need of a lot of bandwidth, distance and no spectrum to put
it....
-Cameron
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