How about BPL to transport data to the ap's?
marlon
- Original Message -
From: Brian Rohrbacher [EMAIL PROTECTED]
To: WISPA General List wireless@wispa.org
Sent: Friday, November 14, 2008 7:09 AM
Subject: Re: [WISPA] IBM backs BPL
I have a motel I am trying to cover with internet.
Anyone know if that Teletronics system is still out there? The one that
used the existing catv cable and put a small wall plate antenna in each
room? Pretty slick...
marlon
- Original Message -
From: 3-dB Networks [EMAIL PROTECTED]
To: 'WISPA General List' wireless@wispa.org
Sent:
Yes, but he is on their tower for free in exchange for transporting
traffic.
Travis
Chuck McCown - 3 wrote:
We pay rent to one county to be in their building and on their tower.
The sheriff's office might be on some paperwork somewhere. Not unheard of.
- Original Message -
From:
In a contract, there is offer, acceptance, consideration and performance.
Consideration doesn't have to be monetary.
If the Sheriff paid $1000/month for transport and charged $1000/month for rent,
it wouldn't change anything.
Each side is getting something of value. Transport, rent, dollars,
On Sat, 15 Nov 2008, Chuck McCown - 3 wrote:
In a contract, there is offer, acceptance, consideration and
performance. Consideration doesn't have to be monetary. If the
Sheriff paid $1000/month for transport and charged $1000/month for
rent, it wouldn't change anything. Each side is getting
To clarify, by real interference I meant they are no worse than
anything else we deal with. Like any RF transmission, there are
emmisions, but those can be dealt with just like the way we (WISP's)
deal with them. The ARRL made a mountain out of molehill and it was
all political as far as I'm
One of the electric companies I worked for, I did just that. We used
BPL for backhaul and used an AP to catch the local area subscribers.
It was great, especially when there are LOS issues. Of course, that
was what Amperion's BPL product was all about.
Obviously, the same hybrid concept also works
BPL on HV was and is a stupid idea. HV infrastructure was not built with
the idea of being a transmission line for RF. To get any kind if speed you
have to use lots of power, even then it is very very short range. You might
as well set up a whole bunch of dragonwaves in a drop and insert
I know we checked into 4.9 use by a WISP, where a WISP told
the local authorities he already had 4.9 online, all he had to do was
flip a switch and they could share it.
The FCC laughed, and said only till they got caught, and they were
sure that I would start the complaint ball rolling.;
Don't
I disagree. I personally saw BPL work and work very well. As far as
setting up a bunch of dragonwaves, you must have line of sight. As far
as range, whats the point? Ethernet is only rated at 100 meters and it
is widely used. BPL's range is much farther than that. It's all
realitive. The powergrid
One huge reason, powerlines are not constant impedance to RF. Nor are they
balanced. This is like trying to pump natural gas down the water lines.
Pipe, right? What's the problem?
It is never going to ever work as well as balanced transmission lines, let
alone coax or fiber. And it is going
Chuck,
It's as though you didnt read my post!
BPL works - with acceptable interference - I saw it with my own eyes
along with dozens of skeptical ham operators. Theory does not matter,
those issues are conquered. Seeing is believing.
-RickG
On Sat, Nov 15, 2008 at 5:24 PM, Chuck McCown - 3
I read your post, I was also involved in the testing. They didn't hit
their throughput nor did they achieve any of the interference mask
parameters. We tried several versions of this. If you want 512kbps you can
do it. But Michael Powell was promising 500 mbps magically flowing through
Chuck is right on the spot.
RF is very demanding both in transmission lines and radiators. We all
know how much discipline we need to invoke when deploying successful RF
links.
RF on an unbalanced, geometrically variable conductor will barely move
with most being dissipated as heat or radiated
What do you call BPL?
HV
or
MV
or
LV?
LV works. I don't call that BPL. It isn't a method to magically distribute
broadband to a city. It is only a way to use the power drop as a way to get
into the house. Some of those systems used Motorola Canopy to get to the
distribution point.
MV
This summer I had a couple of junior year EE interns in the shop to do some
dirtywork. They got very very familiar with antenna range measurements by
the end of the summer. But I had to laugh when I would ask them to measure
the return loss on a new design. They would look confused and then
We had an old 95' rohn25 tower (probably 100' with 5' in the ground)
that is 50+ years old and we took it down. It came with the site when I
bought it ten years ago. It was quickly reguyed early in my ownership
and had served us well. The old (unused) guys were crusty rusty and
brittle, so I
Nice, my favorite part was the truck at the end pulling the tower out of the
woods. Quite a few antennas on that other tower.
Kurt Fankhauser
WAVELINC
P.O. Box 126
Bucyrus, OH 44820
419-562-6405
www.wavelinc.com
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