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" <bwebs...@wirelessmapping.com>
To: "WISPA General List" <wireless@wispa.org>
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: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org]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" <t...@ida.net>
To: "WISPA General List" <wireless@wispa.org>
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
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