Oh Patrick, you couldn't resist .... Motorola is extremely conservative on
the spec sheet. "4.21 Mbps" Net typical" where you get that? I got
Advantage customers at 10 miles getting full 14 Mbps ...It may not be the
most effective modulation, but is a very good compromise between
performance
and interference rejection. And don't negate the fact that GPS is a must
have tool for Cell deployment, It saves you spectrum, tower space and I
can
play nice with other carriers using Canopy... Why you think all cell
carriers rely on GPS ?
Let me see a VL 6 60 deg Sector using only 60 Mhz of channels
Let me see 3 VL Carriers sharing 1 tower
Gino A. Villarini
[EMAIL PROTECTED]
Aeronet Wireless Broadband Corp.
tel 787.273.4143 fax 787.273.4145
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Patrick Leary
Sent: Saturday, December 23, 2006 12:15 AM
To: WISPA General List
Subject: RE: [WISPA] Alvarion Comnet Radios have arrived
Jon,
With a proper channel plan that is just not the case, not to mention
things like ATPC. Things like WiMAX use it because there you are dealing
with small frequency allocations where every last ounce of efficiency
needs to be found. In UL that is not the case since there is so much
more spectrum to work with.
Please don't try to tell me Canopy's use of GPS is good example of UL
efficiency. We both know Canopy's use of GPS is more the reality of the
fact that Canopy is always talking and has no ATPC so the GPS is used to
keep it from stepping on itself.
And speaking about "efficiency," even the Canopy Advantage is a very
inefficient modulation relative to something like VL. Advantage, but
Motorola's own spec sheet, delivers 4.25mbps net typical, 14mbps max (to
1 mile) in a 20MHz channel. VL does over 30mbps net max with typical
over the air in an LOS environment being something like 80% of that well
over 1 mile.
In any event, there exist too many examples to count of scaled VL
networks with co-located cells say you are incorrect in your assertion
that VL can't be built in a cellular topology. It is a silly thing to
assert in fact.
Patrick Leary
AVP WISP Markets
Alvarion, Inc.
o: 650.314.2628
c: 760.580.0080
Vonage: 650.641.1243
[EMAIL PROTECTED]
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Jon Langeler
Sent: Friday, December 22, 2006 9:23 PM
To: WISPA General List
Subject: Re: [WISPA] Alvarion Comnet Radios have arrived
With VL, you still run into the issue of self interference in a cellular
deployment(many tower sites in a region). The only products I'm aware of
that cooperate properly in a cellular deployment are minimally GPS
capable, and the advanced products that support things like hand-off or
N:1 deployment go beyond that with 2-way base station to base station
communication. Technologies such as wimax, 3G, fiber networks, etc. all
use GPS to to improve efficiency and operation. IMO VL may still be a
good product to deploy, but just not in a cellular or "colocated"
deployment.
Jon Langeler
Michwave Tech.
Tom DeReggi wrote:
Charles,
Although your comment is true, and you left out on the fly flexibilty,
what people want is not always the best value, at the end of the day
with all things considered.
The value of consistent availability and right out of the box
deployment is PRICELIST! This doesn't only save cost of installer
labor, but also management labor in purchasing and aquisition.
I'll share something from my experience that I find is Ironic as heck.
I always looked at Alvarion as the high end market gear, but its being
a stronger residential play. I recently have done a lot with
War/StarV3 for high end business, mostly Point to Point links, because
I can get good speed, flexibilty to reach the neighboring building,
and great testing tools with things like Iperf BUILT-IN able to test
Ethernet connections as well as RF conclusively link by link, as hops
increase as the backbone mesh grows. Alvarion is also a great product
for high end business, which I'm also using in some cases, but I have
a higher cost to accomplish that, since StarOS has dual radio slots.
Where Alvarion has now shown undisputable advantage based on its new
low price, is in its residential application. The difference between
$185 and $285, is almost nothing compared to my time savings in
operations. The ease of opening the box and installing a VL is
unmatched. What VL does for me, is that it gives me confidence in
using subcontractors to isntall. Because I know they'll take the time
to make sure they get the best signal. With my other gear, its such a
pain to get best signal, I was afraid to use contractors and only do
installs with employees by the hour, so their income did not deter
them from doing their best job. I gladly pay $100 more for a complete
ready to go product. The only thing that keeps me from going 100%
Alvarion for residential is that, I already have 100 APs installed of
another manufacturer, and I need to focus on revenue not re-build
out. Its not just the cost to replace the AP, its the cost to replace
the consumers without downtime, all at once, when there is little free
spectrum left to just install a new AP. To install a new AP, and
existing AP must be removed first, in many cases. From a
performance/reliabilty point of view, there is nothing wrong with the
gear I previously preferred to use, but from an operations and
installation point of view, my operations can scale much easier using
the VL. Low marging residential is where that matters most. Its
important to be able to have consistent install time and meet
schedules. The other day I ran out of pigtail. The other day I ran
out of thin thread stand offs. The other day I ran out of J-Arms. The
other day I ran out of antennas that came with mounts that support
2-3/8" pole. Everyday there is a barrier that delays operations. Sure
an easy barrier to fix, but still a delay. Instead of focussing on
sales, I'm focusing on making sure I have enough Gold standoffs in
stock (5 cent parts). There is something to be said for what Alvarion
has offered through the Commnet program, probably one of the strongest
value propositions offered to date. Its going to really make the
competition work. Just my 2 cents.
The competitions, just better hope that Alvarion doesn't offer an AP
trade-up program, to help conversion.
Tom DeReggi
RapidDSL & Wireless, Inc
IntAirNet- Fixed Wireless Broadband
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