Quite recently the upstream SNR took a mighty dip from a steady ~10 dB to almost 0 and sync was lost. Recoverywas to ~8 dB. Downstream SNR before and after the event was ~3dB. Prior to the event sync was 8178 /888; after 8215/656 kbps. Is there some relationship between down/up syncs and down/up SNR, and why am I seeing a small rise is downstream speed and a somewhat larger drop in upstream?
No one has to agree with my opinion, but in the time I have left a miracle would be nice.