@jack6 Most of my runs are less than 250’, none are over the Spec of 310’. The one that is currently having a problem is a 120’ run at 80’ ALG on a rail way tower. Railway guys do grounding like telco’s do grounding and they did the installation, not my guys.
The flapping problem is so random that testing at the tower site is not practical. I have a test rig that we put them on in the shop, with a 300’ cable run and they might run for a week at gig and then flap for an hour or a day, or not at all. Brand new B5/C’s do the same thing.
All sites are powered with Netonix POE switches. I’ve tried driving the Mimosa on Both 48V and 48VH (which is power on all four pair) when they are flapping and it doesn’t matter.
I RMA’d 2 B5’s a couple years ago that were doing the same thing - I never heard back.
I am 100% certain that Mimosa knows they have a problem and 99% certain that they know what it is - BUT they refuse to step up and recall their broken products - which have been faulty since day 1. I refuse to support that idea.