My line 3 has a ZyXEL VMG 1312-B10A with Johnson firmware in it which is a bit slow and slightly sickly with the hollow SNR-vs-tones-graph malaise. It is running at a speed that is somewhat over the top in that the downstream SNR is a bit lower now than the 3dB target that it has been set to have.
Here is the Johnson graph of uncorrected CRC errors per unit time vs time. Too many CRCs per unit time?
I can’t remember what the Johnson graphs ‘unit time’ is, anyone help? I can soon force a resynch to reduce the number of uncorrected CRC errors.