I'd offer technical reason not to buy 900 system based primarily on
price. The build-your-own gear using XR9 or SR9 type cards or wifi
systems converted to do 900 are inferior to popular proprietary 900
systems in many cases where interference exists.
I have used Alvarion BA-II 900, Trango 900, MT+SR9, MT+XR9, and Alvarion
VL900. We have neighboring competitors using Canopy 900 and
Vecima/Waverider 900. There are also water utilities using 900 in some
nearby cities.
The Alvarion gear (both types) has lots of little things you can tweek
to compensate for various things that cause performance trouble. They
are really well thought out and have a bit of a learning curve to get
the best performance out of them. The trango is much simpler, and less
sensitive. It works full speed all the time unless the signal gets too
low or interference causes it to lose packets. It's fairly robust. The
SR9 system was fairly finicky and provided intermittent results in the
vicinity of our BA-II 900 system, even with good frequency and distance
separation. We dumped it. The XR9 based system seems capable of good
speed in good conditions, but was very finicky and unreliable in the
presence of Alvarion VL900 gear also in different frequncies and
physical separation. We've still got it, but aren't using it. The
SR9/XR9 MT based systems do not have the controls and tweeks available
on the Alvarion systems in terms of noise immunity, atpc, modulation
activity, etc.. Canopy is said to work well, but it's capacity has been
lacking, trango is no longer affordable new on a per SU basis. BA-II 900
is reliable and cheap but doesn't have enough capacity for a new
deployment. Waveride didn't have the right remote management when we
looked into that. Alvarion VL is about the same cost as their other VL
products, not UBNT/MT cheap, but less expensive than some of their
proprietary competitors.
On Fri, Jun 05, 2009 at 12:16:56PM -0700, Forbes Mercy wrote:
> I am curious if anyone can tell me the technical reason why 900MHZ has
> no reasonable cost CPE. Here I am paying $70 for CPE on 2.4 gear, $90
> for 5.8 but the best price I can find is $290 for 900 MHZ. Just curious
> as to why?
>
> Forbes
--
/*
Jason Philbrook | Midcoast Internet Solutions - Wireless and DSL
KB1IOJ | Broadband Internet Access, Dialup, and Hosting
http://f64.nu/ | for Midcoast Maine http://www.midcoast.com/
*/
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