This has come up in the past but I don't see any answers from the past couple of years so forgive me if I'm redundant.

Are RouterOS radios, specifically SXTs, approved for use in the United States in the 5250-5350 and 5470-5725 (minus TDWR) bands yet? I've run into a contractor who's installing them there, but I'm not sure that it's fully legal yet.

It might be within spec if it's set to DFS-Radar, the scan list is set up to include the authorized bands, the scan list excludes any TDWR systems within 35 miles and 30 MHz, and the power (on an SXT) is set down to +14, since EIRP there is allowed to be +30. Observing one such installation, it does detect radar now and then and scan for a new frequency, though it might not be equally distributing the load across the band, as the rule theoretically specifies.

The 5725-5825 band is easier to use legally, of course, but it's also rather cluttered in urban areas. I'd rather stick with SXTs if they can be used legally. Thanks.

Great question!! I'm interested in this topic and for the sake of discussion would like to post a link (not the best resource I know). Does anyone know if this is up to date?

https://en.wikipedia.org/wiki/List_of_WLAN_channels

Also see..

http://www.revolutionwifi.net/2013/03/8 ... nning.html

So to me it looks like there's only 4 channels, 149, 153, 157, 161 that allow for 'hi gain' broadcast. I have a network that travels (mostly in the US) and can see as many as 5 cities a week. There will be a time when 5ghz is crowded and will have to look for other options. I don't mean to piggy back off of your question but I'm thinking the potential information discussed in this thread would be pertinent to your initial question and help everyone navigate the 5ghz spectrum in an orderly manner.

You raise a good question. The US rules for 5725-5850 are quite loose. You don't need to be on a given "channel", and there is no limit on ERP for a point to point link. (It's +36 for point to multipoint.) You can use 5 or 10 MHz channels too, though narrower channels bring in lower transmitter power limits (17dBm/MHz in 15.407, 8 dBm/3kHz in 15.247).

The problem here is that those frequencies are pretty busy. I'm actually dealing with some police agencies (not a WISP) who could use the licensed 4900 MHz band, but the SXTs don't go down that low. So the 5250-5350 and 5470-5580 bands look attractive for the less critical links that can tolerate DFS and the occasional false radar detection. But if MikroTik isn't legal there, they'll need some other vendor to replace those costly old Motorolas as they wear out.

Not sure of the SXT's hardware limitations but have read on the forums that Mikrotik can unlock frequencies in the 4900mhz band on some products. How, I'm not sure possibly proof of a license? A quick search didn't show anything obvious. Maybe someone can chime in if it's possible or how it's done.

On a side note. Reading some rules again it appears channel 165 (ISM) is fair game but may have interference due to medical equipment.

One of the routers (the one which initiates ipsec connection) reboots while establishing ipsec