case completed by local support team
Maybe your radio is not configured properly. Hire a professional to do it for you.
We have B5 with approx 10km link @250Mbps, a fantastic B5c 46km @100Mbps… if you cannot get a proper link with 500m you have a problem: bad working B5 (the config is fool proof so I cannot think you are not able to do it).
Old versions of B5 suffered many problems but since 2016 they are spectacular.
I see that you contacted our Support team earlier today (for the first time), and that we offered phone support, but you did not call us back.
If you would prefer, please send the support logs (.tar files) from each radio to firstname.lastname@example.org and we will be happy to help you. To download these, go to Diagnostics > Logs > Support and then click the blue download button.