Charles,
This post of yours, is getting into the meat and potatos of what we need to
know to make a fair comparison.
see responses in line....
.the FCC doesn't allow someone to license a 56 MHz channel,
so to run at this date rate, you would have to license 2 adjacent
channels (2x the license cost, and at ~ $3500 / link, it's nothing to
sneeze at)
To be accurate, I'm not convinved licensing two channels cost double $3500.
Maybe that is what You charge, but not the FCC.
3. Under Part 101, it is technically illegal to just "squat" on the
frequency by grabbing that extra channel...you have to use it or you
lose it
Other than cost, what prevents a WISP from licensing both channels? What
method of proof is required, to show need and use to the FCC, to meet legal
requirement?
5. From a comparison perspective, Horizon has a max capacity of 350 Mbps
FD on a single FCC channel (so it's 350 vs 240)
At what penalty, to acheive 350?
For hypothetical example, 350 reducing range compared to 240 with Giga link?
6. From a raw performance perspective, TrangoLINK Giga requires 256 QAM
modulation to get 240 Mb FD...Horizon does 270 Mb FD with 128 QAM; the
difference in receive sensitivity between 128 QAM to 256 QAM can be
anywhere from 5-10 dB
How is this possible, that Horizon can acheive BOTH lower modulation and
smaller channel size, while maintaining higher throughput?
Its hard to believe. How are they beating physics?
7. High Power -- not sure about the specs of the TrangoLINK Giga, but
having a High Power variant gives Horizon an extra 7 dB worth of output
power...depending on the frequency, that can be almost 2' worth of
antenna
Definately a plus, for those longer range links, and landlords finicky on
antenna size limits.
As you state, Trango's output power needs defining, to know if an advantage.
10. Dragonwave is a company that is focused exclusively and is committed
to backhaul; it also has a product roadmaps for AirPair that allow for
future upgradability (AirPair has a roadmap that will get it to 1 GB+ in
the future)
Doesn't the Trango Gigalink also have a migration path to 600mbps?
With all said, the competitive analisys is not just against other Licensed
manufacturers.
The competition is Gigabit MW gear. Best of Class MW gear can reliably
achieve 2 mile in high rain regions at 4- 9s, with 2 ft parabolics.
The purpose of Licensed is to gain farther distances at capacities as close
to GB as possible, and lower cost.
So the challenge is how far can manufacturer's go in licensed, at Highest
speeds?
For apples to apples comparison, with 2 ft dishes on both ends, w/ 18Ghz,
how far can we go to deliver 4- 9's reliabilty or better, at peak speed
(240mbps or higher) with the various manufacturers? How many roof top
leases can I by pass, to enable me to build out my backbone network in a
region, using these manufacturers?
What can Horizon accomplish?
Tom DeReggi
RapidDSL & Wireless, Inc
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