I think it all depends on the link. We have some links/APs on DFS channels that have been running for years without any DFS hits, and others that are pretty much unusable.
On Tue, Oct 25, 2016 at 9:18 AM, Kurt Fankhauser <[email protected]> wrote: > Well on AF5X I had way to may false radar hits to the point where I would > absolutely avoid putting nay backhaul on DFS freqs. Not all of my towers > have redundant links. I > > On Tue, Oct 25, 2016 at 10:14 AM, Ken Hohhof <[email protected]> wrote: > >> Exactly. I don’t consider a minute of downtime acceptable on a backhaul, >> especially if you have no control over when or how often it happens. Also >> it’s long enough to trigger OSPF to reroute traffic. >> >> >> >> Customer expectations about the Internet have changed, the phone may >> already be ringing before the AP has finished scanning and the SMs have >> reregistered on the new frequency. Their phone calls drop, their video >> pauses, they get kicked out of games, their VPN session to work drops. >> >> >> >> >> >> *From:* Af [mailto:[email protected]] *On Behalf Of *Mike Hammett >> *Sent:* Tuesday, October 25, 2016 9:05 AM >> *To:* [email protected] >> *Subject:* Re: [AFMUG] AF-5U vs. AF-5x >> >> >> >> There's still the LBT timer. >> >> >> >> ----- >> Mike Hammett >> Intelligent Computing Solutions <http://www.ics-il.com/> >> <https://www.facebook.com/ICSIL> >> <https://plus.google.com/+IntelligentComputingSolutionsDeKalb> >> <https://www.linkedin.com/company/intelligent-computing-solutions> >> <https://twitter.com/ICSIL> >> Midwest Internet Exchange <http://www.midwest-ix.com/> >> <https://www.facebook.com/mdwestix> >> <https://www.linkedin.com/company/midwest-internet-exchange> >> <https://twitter.com/mdwestix> >> The Brothers WISP <http://www.thebrotherswisp.com/> >> <https://www.facebook.com/thebrotherswisp> >> >> >> <https://www.youtube.com/channel/UCXSdfxQv7SpoRQYNyLwntZg> >> ------------------------------ >> >> *From: *"Kurt Fankhauser" <[email protected]> >> *To: *[email protected] >> *Sent: *Tuesday, October 25, 2016 9:03:35 AM >> *Subject: *Re: [AFMUG] AF-5U vs. AF-5x >> >> With the PMP450 you can select up to 2 alternative frequencies for the >> radio to go to if it gets a DFS hit. Very rarely would all 3 frequencies >> get hits and cause the AP to go down. >> >> >> >> On Tue, Oct 25, 2016 at 9:04 AM, Mike Hammett <[email protected]> wrote: >> >> DFS is great for PtP because if it goes down, you have another one on >> another path. Not so with PtMP. >> >> >> >> ----- >> Mike Hammett >> Intelligent Computing Solutions <http://www.ics-il.com/> >> <https://www.facebook.com/ICSIL> >> <https://plus.google.com/+IntelligentComputingSolutionsDeKalb> >> <https://www.linkedin.com/company/intelligent-computing-solutions> >> <https://twitter.com/ICSIL> >> Midwest Internet Exchange <http://www.midwest-ix.com/> >> <https://www.facebook.com/mdwestix> >> <https://www.linkedin.com/company/midwest-internet-exchange> >> <https://twitter.com/mdwestix> >> The Brothers WISP <http://www.thebrotherswisp.com/> >> <https://www.facebook.com/thebrotherswisp> >> >> >> <https://www.youtube.com/channel/UCXSdfxQv7SpoRQYNyLwntZg> >> ------------------------------ >> >> *From: *"Ken Hohhof" <[email protected]> >> *To: *[email protected] >> *Sent: *Monday, October 24, 2016 9:14:47 AM >> *Subject: *Re: [AFMUG] AF-5U vs. AF-5x >> >> I think PTP links are narrow beams and carefully engineered. On the >> other hand some PTP radios allow auto frequency change. >> >> >> >> I would be very cautious about using those frequencies and make sure the >> path isn’t inline with any TDWR sites no matter the distance. For that >> matter, I really don’t like the idea of using DFS frequencies for PTP >> links, can you really afford the downtime for a false radar detect? Do you >> not have lower 5 GHz non-DFS frequencies available to use instead? >> >> >> >> >> >> *From:* Af [mailto:[email protected]] *On Behalf Of *Kurt Fankhauser >> *Sent:* Monday, October 24, 2016 8:57 AM >> *To:* [email protected] >> *Subject:* Re: [AFMUG] AF-5U vs. AF-5x >> >> >> >> I am 60 miles from closest TDWR. I just thought it was odd that the AF5X >> allows transmit on that freq but the PMP450 AP has those frequencies greyed >> out. I figured that Cambium would be certified for more freqs than UBNT. >> Maybe cambium just made that choice to make those freqs unavailable. >> >> >> >> On Mon, Oct 24, 2016 at 8:53 AM, Josh Luthman < >> [email protected]> wrote: >> >> As long as you're at a safe distance yes. I'm sure you're more than 30 >> km from me for the TDWR here. >> >> Josh Luthman >> Office: 937-552-2340 >> Direct: 937-552-2343 >> 1100 Wayne St >> Suite 1337 >> Troy, OH 45373 >> >> >> >> On Oct 24, 2016 8:30 AM, "Kurt Fankhauser" <[email protected]> >> wrote: >> >> Is AF5X legal to transmit on 5600-5650mhz? Firmware 3.2.1 allows it to be >> selected. Is that a mistake? >> >> >> >> On Mon, Oct 24, 2016 at 8:24 AM, Josh Reynolds <[email protected]> >> wrote: >> >> Yeah, the U is upper band only. >> >> The AF-5 goes down to 5470 (if the datasheet is still accurate). Very >> good antennas, but limited gain. 1024QAM. GPS sync. Good radio for the >> money, as long as it works for your link distance. >> >> >> >> On Oct 24, 2016 7:14 AM, "Josh Luthman" <[email protected]> >> wrote: >> >> I think one or two modulations. >> >> You can't do the lower frequencies on the U. >> >> Josh Luthman >> Office: 937-552-2340 >> Direct: 937-552-2343 >> 1100 Wayne St >> Suite 1337 >> Troy, OH 45373 >> >> >> >> On Oct 24, 2016 8:05 AM, "Paul McCall" <[email protected]> wrote: >> >> Is there any difference performance wise on these two? >> >> >> >> What is the distance for full modulation on the *AF-5U* >> <https://www.streakwave.com/itemdesc.asp?ic=AF%2D5U&eq=&Tp=&o1=0> ? >> >> >> >> What is the longest link (at decent modulation) on the *AF-5U* >> <https://www.streakwave.com/itemdesc.asp?ic=AF%2D5U&eq=&Tp=&o1=0> >> >> >> >> I understand that will vary quite a bit with the normal environmental >> factors, but looking to get close on a comparison >> >> >> >> Paul McCall, President >> >> PDMNet, Inc. / Florida Broadband, Inc. >> >> 658 Old Dixie Highway >> >> Vero Beach, FL 32962 >> >> 772-564-6800 >> >> [email protected] >> >> www.pdmnet.com >> >> www.floridabroadband.com >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> > >
