It was PPP reconnect to different gateway (these shouldn't affect DLM) as I have done it many times from February until few weeks ago then DLM went BANG on my line. But, when I saw openreach engineers working on my cabinet - it probably the reason for this:
Last February my FTTC is maximum rate of 113136k / 38700 with snr of 15.1 / 23.2
Current now my FTTC is maximum rate of 93260k / 33562k with snr of 9.7 / 15.0 (possibility engineer work on cabinet cause this?)
Latest stats:
Since Link time = 7 hours 5 min 11 sec
FEC: 0 99
CRC: 7 4
ES: 6 4
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0