Hi,
The last three links we installed have been Dragonwave (two AirPair 50's
and one AirPair 100). They provide full-duplex operation at whatever
speed you buy (so the AirPair 50's will do 50Mbps x 50Mbps). I have been
able to get 52Mbps across the 50's using the Mikrotik speed test program
(TCP). Cost can vary depending on antenna size, but in the least
expensive config you are around $16k with the FCC license.
The previous two links were WitCom units. They were more like $25k (4
years ago), but have paid for themselves many times over. :)
Travis
Microserv
John Scrivner wrote:
Are these Dragon Wave links? This is good news for the up-time you are
seeing. Do you have much rain where you are? I am definitely more
interested in this band now. What kind of speeds can a guy expect from
links like this? How much do they cost?
Thanks much,
Scriv
Travis Johnson wrote:
Hi,
We have had several 18ghz links up and running for almost 4 years.
Using many of the path calc programs, they show as much as 28 minutes
per year of outage (due to multi-path and rain fade). Yet, during the
entire last 4 years, we have never seen the signal change by more
than 3-4db. We have over 30db of fade margin on these links... so, my
question is, does 18ghz just die instantly (like 38ghz does) in a
heavy rain storm? We have never had either of our 18ghz links go down
(one is 7 miles and the other is 19 miles).
I am wanting to try and do a 28 mile link, and I can do it with 20db
of fade margin... so I am wondering if that will be enough, or if the
path calcs will be correct and we will have as much as 20 hours of
downtime per year? (99.7653% uptime).
Any thoughts?
Travis
Microserv
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