My line 1 is set to 6 dB downstream target SNRM and 9db upstream, supposedly. This morning, for god only knows what reason, the line dropped at around 9:25 am and resynched with a d/s SNRM of 3dB which was wrong. I have no idea why it resynched and I have no idea why it was at 3dB, not the 6dB that is on record in clueless.aa.net.uk
This then caused me a load of problems with Zoom as the error rate was too high.
I’ve just forced an SNR reset, and the SNRM is now 6.5 dB d/s / 9.0 dB u/s, just as it should be.