A lot of doom and gloom in this thread.
I'll say that we have some customers on a 900mhz 450i getting 6mbps or
so at -80 something on a 5mhz channel. I think the weakest is -86dbm.
The ones on 900mhz did not work with LTE, even with 1W tx and an 18dbi
sector antenna. There is literally zero signal on LTE, but 900mhz
works. My point being there are sometimes places where you have no
other option but 900.
Maybe have a frank talk with that handful of customers. Say you can
keep what you've got, or you can contribute $x towards an infrastructure
upgrade that will give you more speed. Replace X with whatever value
makes the situation viable.
------ Original Message ------
From: "Dave" <dmilho...@wletc.com>
To: af@afmug.com
Sent: 11/30/2017 5:29:20 PM
Subject: Re: [AFMUG] 900mhz 450i make sense to deploy?
Really hard to say depending where you are with current 900 noise
floors what they are.
In my area its not too bad as smart meters dont exist here. The other
issue I have ran into is RFID entry points and
Gated communities using automated gates.
It works for us in some area but not others and it can be a real bear
to coordinate channels and framing to get it all
to work right especially with the higher demand in capacity needs of
the end user. We have 30 Access points in a single county wide
deployment and all of them are on 10Mhz wide channels which only allows
for 2 channels so we
had to work issues at each site with proper antenna positions and
locations on the tower to overcome self interference. The biggest
gotcha is not adding the correct gain for both AP antennas and
Subscriber antennas.
The 450i radio really uses the ATPC to control power levels at the AP
and Subscriber to help overcome saturation and
OOBEs.
Its definately given us some breathing room to help move to better
service for those who were only getting 1Mb on the FSK.
We able to effectively provide 12Mb basic plans on any of our 900
sectors and have 30 subs on several APs without much issue.
I still watch the frame utilization graphs vs throughput to be sure we
are not overloaded.
On 11/30/2017 11:17 AM, Kurt Fankhauser wrote:
So I have 2% of my customer base that is running 900mhz PMP100 using
11 different access points. I am trying to cost justify weather it is
feasible to upgrade them to PMP450i-900mhz. I am using a lot of Omni's
with the PMP100 so most likely I will need twice as many AP's as I
currently have because they won't all be on the same side of the
towers. So looking at costs I see the following:
PMP450i AP's x 20 = $46,000
900mhz sectors x 20 = $6,320
PMP450 SM x 20 = $4,784
SM antenna x 20 = $1,424
equipment cost total = $58,528
plus my time of putting it all up
I am currently grossing $934.00/month from the 2% of customers running
on the PMP100-900mhz now.
At this rate it would take 5 years to break even on deploying the
450i-900mhz and I really can't offer any better speeds with it than
what I was able to offer with the old FSK 2.4/5ghz stuff.
Is it just me or does this not make sense worth deploying?
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