Jim,
A lot of channel selection is determined by case-specific considerations,
but here are a few observations:
The bottom end of the 902-928 spectrum is sometimes useless due to cell
phone interference
The top end of the 902-928 spectrum is sometimes useless due to pager system
interference
Any part and sometimes all of the 902-928 spectrum is eaten away by
frequency hopping systems such as SCADA, Water Meter Readers, Alvarion
Radios, etc.
Certain home cordless phones that operate in the 902-928 spectrum will
interrupt the entire spectrum while ringing. Some cordless phones will only
interrupt the upper end of 902-928 while ringing (they seem to ring on
925-928 or thereabouts). Any part of the 902-928 spectrum may be disrupted
by an old cordless phone because many of the older phones were fixed to a
specific frequency or subset of frequencies.
Bottom line... no one solution will fit all cases. You should get a
spectrum analyzer out and survey your area before deploying. You should
order and install cavity filters for your AP's to limit the amount of noise
that your AP's pick-up but realize that your client radios will still pick
up the noise because you aren't going to be install $300 cavity filters at
each client location.
Unless you are using equipment which rejects TONS of noise, you should avoid
making your business plan rely upon servicing individuals in an urban
environment where houses are closely spaced. In my experience, Waverider
and Trango are not suitable for use in areas with a great deal of
interference unless you are willing to face a certain number of failed
installations due to unavoidable interference (when one of the neighbors has
a 900mhz device in their home and causes your customer to intermittantly
lose service). I can't speak to whether Canopy or Alvarion experience these
same issues in 900... perhaps some others from the list can share their
experiences on these or other 900 products.
Larry Yunker
Network Consultant
[EMAIL PROTECTED]
www.wispadvantage.com
----- Original Message -----
From: "Jim Stout" <[EMAIL PROTECTED]>
To: "WISPA General List" <wireless@wispa.org>
Sent: Sunday, April 08, 2007 10:14 AM
Subject: [WISPA] 900 MHz Help
Folks,
I'm just entering into the 900MHz space and would appreciate any advice
on channel selection and channel width settings.
TIA, Jim....
Jim Stout
LTO Communications, LLC
15701 Henry Andrews Dr
Pleasant Hill, MO 64080
(816) 305-1076 - Mobile
(816) 497-0033 - Pager
--
WISPA Wireless List: wireless@wispa.org
Subscribe/Unsubscribe:
http://lists.wispa.org/mailman/listinfo/wireless
Archives: http://lists.wispa.org/pipermail/wireless/
--
WISPA Wireless List: wireless@wispa.org
Subscribe/Unsubscribe:
http://lists.wispa.org/mailman/listinfo/wireless
Archives: http://lists.wispa.org/pipermail/wireless/
