180 second wait on a detect, i believe. so it waits the 180 before transmitting initially, then if there is a detection it waits to hop. the 4.4.2 firmware is really sticky on your alternate channels, it wont let you save them if you dont have the required separation (no to 2.5 or 5mhz) DFS is really only a 2 mile pmp solution on a good day with your leg cocked back. but you can do massive speeds in that 2 miles. youre "supposed" to spread your DFS use across the whole band across your network but i doubt anybody does. consumer stuff i wonder if it has the same requirements for detection since its "indoor" only.
On Thu, Nov 21, 2019 at 10:32 AM Ken Hohhof <af...@kwisp.com> wrote: > We mostly avoid DFS frequencies on APs because of the impact if we get > false radar detects. Also we are mostly a Cambium shop. So I’m a bit > confused about DFS on other vendor equipment like Ubiquiti as well as home > routers. > > > > Question 1 – what happens when there’s a DFS detection? On the Cambium > gear, we have to select 1 or 2 alternate frequencies. But on other gear, I > don’t see this. When there’s a DFS hit, does it jump to another random > frequency? Does it rescan the current frequency until it tests clear and > only then resume transmission? Is the answer right in front of me and I’m > being stupid? Maybe in the case of routers they are exempt because of low > EIRP? > > > > Question 2 – what about 40/80/160 MHz channels? We have a competitor > using Ubiquiti gear and advertising residential subscriber speed plans up > to 100x100. Clearly they must be using at least 40 MHz channels if not 80 > MHz, or else their marketing people have burning pants and long noses. And > I don’t see how a WISP, especially one surrounded by other WISPs, could use > wide channels other than in DFS bands. We have some PTP links using 40 MHz > but only 10 and 20 MHz channels on our APs. So assuming you are using 40 > or 80 MHz in DFS, what happens when there’s a DFS detect? Does the whole > 40 or 80 MHz have to find a new home? Can it slide over 2.5 or 5 MHz and > substantially overlap the previous occupied spectrum? DFS bands come with > enough spectrum to use wide channels, but is there enough to jump around > when you take a DFS hit? > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
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