|
I've seen SMs do all kinds of crazy things during a brown out. It
happened more when the power bricks were simple transformers, as
the voltage sag would get through to the SM. They would reset to
factory default, uncalibrated. So yeah. bp
<part15sbs{at}gmail{dot}com>
On 10/31/2019 11:01 AM, Ken Hohhof
wrote:
Has anyone experienced a Cambium SM losing not just the radio calibration data but the config and also reverting to 4 Mbps aggregate (it was bought as a 20 Mbps unit, this wasn't even an upgrade key, although I suspect they all start as 4 Mbps units and the factory squirts a feature key into them)?This happened when a customer had a power outage, we had installed a new SM about a week before. Cambium Support is wanting a remote session so they can telnet in and restore the radio calibration data. I am thinking there's a bigger problem than the calibration data, since it lost its config and went back to factory defaults, and also went from 20 Mbps to 4 Mbps. We also several concerning log entries including "MPU violation occurred in this build. MPU is disabled until next upgrade/downgrade" and stuff like fatal error, illegal instruction and register out of range. I'm thinking I should just bite the bullet and throw this SM away, although it's a 3.65 SM so it wasn't cheap. |
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