Marlon,
I can assist with any of the unlicensed (2.4, 5.8) or light-licensed
(3.65) or 4.9 RF design work. Since you will be carrying public safety
traffic, I'd go licensed on the backbone with 5.8 GHz backup as Travis
and Brian suggest. For those full-licensed links I'd suggest contacting
and comparing quotes from at least two companies that are experienced
distributors of licensed equipment.
jack
Marlon K. Schafer wrote:
Butch does a lot of work for me already. I'll touch base with him.
Do you see anything here that you'd be a good resource for?
laters,
marlon
----- Original Message -----
From: "Jack Unger" <[email protected]>
To: "WISPA General List" <[email protected]>
Sent: Wednesday, March 04, 2009 8:11 AM
Subject: Re: [WISPA] 100 meg full duplex backhaul
Marlon K. Schafer wrote:
Certainly Jack. I don't know anyone that's built something like this
already though.
And, it's really not that far off from what we already do. It's just
bigger and faster.
I've not used the hardware needed for this system so I'm mostly
interested in what people would install. I know there are a few people
here that have very high speed backbone systems in place.
The one part that's got me stumped so far is what to do to create a load
sharing load balancing mechanism at the main towers. Should that be done
via high end switch or router?
I'd suggest using a router at each main tower. That can provide the load
sharing/balancing plus the other network management functions that you
will need. I'd suggest contacting Dennis Burgess or Butch Evans and
paying either of them for a few hours of consulting services now so you
can get a first-pass network design that can be fine-tuned later. It
will save you a lot of time and frustration and give you the knowledge
and confidence that you need now to move forward efficiently.
If you know someone that would be good help in putting this idea together
please feel free to have them contact me. Please note, that nothing will
be able to happen at a nut and bolt specific level until construction
starts. The program is customer and land acquisition specific, not build
it THIS way specific. Did I say that at all clearly? Does it make
sense? That is part of why I've not even looked for help yet, there are
far more questions than plans in place. Things are still at a conceptual
stage, but I'm trying to drill down a bit better.
Thanks!
marlon
----- Original Message -----
From: Jack Unger
To: WISPA General List
Sent: Tuesday, March 03, 2009 10:06 PM
Subject: Re: [WISPA] 100 meg full duplex backhaul
Marlon,
Trying to design a complex system like this via a listserve "committee"
is more than a little bit risky. Have you considered going to someone who
actually has this type of network design experience and paying them to do
the whole job right the first time? Just asking.
jack
Marlon K. Schafer wrote:
I don't know if I'll be able to put some many antennas on the towers.
How close together would I need the towers to prevent the rain fade
outage
at 18 gig?
Aren't there any 5.8 systems that will do this reliably in the first
place?
I shouldn't need 5.x for distribution so I could use it all for backhaul.
I'll have 2.4, 3.65, 4.9 and hopefully, someday, TVBD for the consumers.
marlon
----- Original Message -----
From: "Brian Webster" <[email protected]>
To: "WISPA General List" <[email protected]>
Sent: Tuesday, March 03, 2009 9:44 PM
Subject: Re: [WISPA] 100 meg full duplex backhaul
The 5.8 GHz backup links will help you deal with outages due to
environmental conditions such as rain fade. That has to be factored in
for
links when you operate above 10 GHz. Even if you run a loop configuration
you could have a fade condition that could block out a whole tower site
severing your links to that location in both directions of your loop.
Another path at a lower frequency with spatial diversity from your
primary
link (different mounting heights) would at least keep that site up though
maybe not at full speed.
Thank You,
Brian Webster
-----Original Message-----
From: [email protected] [mailto:[email protected]]On
Behalf Of Marlon K. Schafer
Sent: Wednesday, March 04, 2009 12:26 AM
To: WISPA General List
Subject: Re: [WISPA] 100 meg full duplex backhaul
Thanks.
Do you think we need the unlicensed for each hop if the entire network is
build in a circle?
marlon
----- Original Message -----
From: "Travis Johnson" <[email protected]>
To: "WISPA General List" <[email protected]>
Sent: Tuesday, March 03, 2009 9:12 PM
Subject: Re: [WISPA] 100 meg full duplex backhaul
Licensed 18ghz links with 5.8ghz backup links for each hop. Figure
$15,000 per link for everything.
Travis
Microserv
Marlon K. Schafer wrote:
Hi All,
I'm looking for some gear that'll be rock solid at 15 to 20 miles. Some
links may be less, but I'm not counting on that.
I'll be hauling public safety, private vpns, and normal internet
traffic.
I'll probably have around 20 towers, all linked in a ring. I can load
share
across the ring as long as speeds never drop below 100megs. I'll want
things to be automatically self healing if there is a loss of
connectivity
in any direction.
What would you guys use/suggest?
I'd love to go licensed (but no 6 gig due to antenna sizes) but
unlicensed
may be OK due to the failover capabilities.
We have to worry about snow, fog and, worst of all, dust storms.
What gear would you use? How would you set this up?
I'm in the pricing stage so off list quotes etc. are welcome. Pall park
numbers are fine at this time, as long as they tend to run high vs. low,
I'd
rather over estimate the costs.
thanks,
marlon
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Jack Unger - President, Ask-Wi.Com, Inc.
Serving the Broadband Wireless Industry Since 1993
Cisco Press Author - "Deploying License-Free Wireless WANs"
WISPs - Do you know where your customers are?
For wireless coverage mapping see http://www.ask-wi.com/mapping
FCC Lic. #PG-12-25133 LinkedIn Profile
<http://www.linkedin.com/in/jackunger>
Phone 818-227-4220 Email <[email protected]>
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Archives: http://lists.wispa.org/pipermail/wireless/
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--
Jack Unger - President, Ask-Wi.Com, Inc.
Serving the Broadband Wireless Industry Since 1993
Cisco Press Author - "Deploying License-Free Wireless WANs"
WISPs - Do you know where your customers are?
For wireless coverage mapping see http://www.ask-wi.com/mapping
FCC Lic. #PG-12-25133 LinkedIn Profile <http://www.linkedin.com/in/jackunger>
Phone 818-227-4220 Email <[email protected]>
|
