Rich-
Just so we all know where you are coming from and in the interest of Full
Disclosure, please tell us your involvement in the
Dialcall/Nextel/Motorola/IDEN endeavor- specifically any vested interest in
the technology (hint- Patents).
-Original Message-
Subject: Re: [WISPA] Sprint
While filters can help, the problem that I see is that filters are: 1)
expensive and 2) bulky. Last time I checked, a cavity filter for the
902-928 range was roughly $300-$400. I don't see it being practical to
install one of these at every customer site!
Cavity filters are fine for your
We have been advised that providers of internet services are not
required to file form 499. However, we were additionally advised that
providers of transport services are required to file form 499. We
provide transport services in addition to internet services and as such
file form 499. I
If you have an adjacent channel carrier which is running hundreds of
watts of power then you may not have a choice of whether to use the
bandpass filter or not. Your system may not operate in the upper part of
the 900 MHz band. What happens is that the adjacent carrier will swamp
your receiver
FCC Form 499a is the form for USF contributions.
The FCC has determined that Internet is an Information Service not a
telecom service and has thus unregulated all parts of it. (See Brand-X
case for a more detailed explanation).
Transport, Voice, and Inter-connected VoIP Providers must pay
Cavity Filters create several additional problems
1) Assuming most filters are narrow individual channel widths... It takes
away the benefit to move your Radio Freq Channel to stear around
interference on the fly.
2) Assuming 1 Filter covers the full width of the Band... The filters add
This problem was mentioned back in May (see
http://lists.wispa.org/pipermail/wireless/2006-May/025354.html ) but
it's still here, and I thought it might be worthwhile to bounce it off
folks again, to see if anyone has any new insights.
Occasionally, completely at random, many of our 2.4GHz APs
I'd originally written:
The preponderence of NexTel channels are in the private land mobile
806-821/850-865 conventional / trunking band, and a small percentage in the
902-906 trunking band.
...
I am most likely off on the numeric band
I sure was [numerically off - that is]. What's known as
Bleed over implies that the paging system is transmitting a signal
that is too wide. This is typically NOT the case. Our rather inexpensive
WISP AP receivers do not have adequate selectivity to reject strong
nearby signals. In other words, it's our equipment problem not their
equipment
Scriv needs to hire a good consultant to come check things out!
big grin
Anyway, I've seen things like this before. Not this bad, but close enough.
There have been a few causes.
First, as I recall, this ONLY effects towers within a 15 mile radius. But
it effects ALL towers within that
I concur. When a 900 MHz access point (AP) is located near a
high-power paging (or other high-power) transmitter then a bandpass
filter is cheap insurance to avoid or minimize the AP receiver
desensing (overload) that the high-power transmitter may cause. It's
impossible to know in advance how
If it's true that there's a giant something that's spewing noise, you
can use a spectrum analyzer and try to identify the noise signature,
then triangulate.
jack
David E. Smith wrote:
This problem was mentioned back in May (see
Jack Unger wrote:
If it's true that there's a giant something that's spewing noise, you
can use a spectrum analyzer and try to identify the noise signature,
then triangulate.
If it would just stay broken for a couple hours, I'd love to do that.
Sadly, this problem usually just shows up for a
On 10/27/06, David E. Smith [EMAIL PROTECTED] wrote:
Jack Unger wrote:
If it's true that there's a giant something that's spewing noise, you
can use a spectrum analyzer and try to identify the noise signature,
then triangulate.
If it would just stay broken for a couple hours, I'd love to do
This has been our plan all along. It just will not stay screwed up long
enough to get a single heading. The signal level of the interference
looks like data but it varies in level so much that finding the heading
is not easy. I know spectrum analysis and this one has me stumped. I
wish it
We look at the traffic on the
tower for abuse and/or virus and don't really find anything.
Just to be clear, you've checked your AP broadcast levels during the events
and not found found them elevated? We found the most crippling network
events were not coming into the network from the
Maybe there is a microwave lighting system somewhere nearby.
You know what to do with an outdoor light that needs to be shut off.:^)
Matt Larsen
[EMAIL PROTECTED]
John Scrivner wrote:
This has been our plan all along. It just will not stay screwed up
long enough to get a single heading.
On 10/27/06, Rich Comroe [EMAIL PROTECTED] wrote:
We look at the traffic on the
tower for abuse and/or virus and don't really find anything.
Just to be clear, you've checked your AP broadcast levels during the events
and not found found them elevated? We found the most crippling network
events
On Fri, October 27, 2006 3:11 pm, Eric Merkel wrote:
1) Turning off inter-BSS Relay
Already done, on most towers. (We do have a couple of towers where one
business, with two locations, wants to do VPN-type stuff between 'em.)
2) We block all the typical MS ports(135-139) which broadcast all
Jack,
That all sounds good, and it brings up a good point, that we are just as
probable to be the culprit, not just the other guy.
Besides, their gear costs more, right :-)
However, what specific gear do you have experience with, on this issue, to
support your comment?
I'm not sure that I am
This is a dangerous topic as well.
The writer is somewhat brilliant, in the sense that
he recognizes it is wasteful, for Public safety spectrum to be limited to old
technology principles, and used exclusively for federal public safety. Wouldn't
it be nice if commerical and public safety
FREE OSS and Billing Software for WiSPS
And then there are all the paid services.
http://www.dboss-online.com/
read the pdf
prices on page 22, but I emailed them and they said the prices are
changing. More like $250.00 a month for 0 - 250 customers (bundled
services)
I like how they end their pitch...
The reason and dreams behind getting into the WiSP business in the
first place
can finally be realized by contracting with RidgeviewTel’s WiSP Services
division.
-Matt
Brian Rohrbacher wrote:
FREE OSS and Billing Software for WiSPS
And then there are all
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