Looks as though DLM has relented and I'm back up to 39,999 (capped 40mbps).
My Broadband PingA drop in connection at around 8:15am suggests something may have been done at the cabinet, although the high ES around that time may have forced the reconnect. If the latter was the case I would have expected DLM to either maintain or lower the connection speed.
Still all is currently OK, until the next bout of instability....
============================================================================
VDSL Training Status: Showtime
Mode: VDSL2 Annex B
VDSL Profile: Profile 17a
Traffic Type: PTM Mode
Link Uptime: 0 day: 23 hours: 55 minutes
============================================================================
VDSL Port Details Upstream Downstream
Line Rate: 10.057 Mbps 39.998 Mbps
Actual Net Data Rate: 9.999 Mbps 39.999 Mbps
Trellis Coding: ON ON
SNR Margin: 8.4 dB 11.1 dB
Actual Delay: 0 ms 0 ms
Transmit Power: 7.4 dBm 13.9 dBm
Receive Power: -6.3 dBm -5.3 dBm
Actual INP: 0.0 symbols 52.0 symbols
Total Attenuation: 0.0 dB 19.0 dB
Attainable Net Data Rate: 12.770 Mbps 56.542 Mbps
============================================================================
VDSL Band Status U0 U1 U2 U3 D1 D2 D3
Line Attenuation(dB): 7.0 29.2 43.2 N/A 13.8 34.5 55.4
Signal Attenuation(dB): 7.0 28.7 42.5 N/A 17.0 34.2 55.4
SNR Margin(dB): 8.5 8.4 8.4 N/A 11.1 11.1 10.9
Transmit Power(dBm): 0.6 -14.1 6.5 N/A 11.6 8.1 5.5
============================================================================
VDSL Counters
Downstream Upstream
Since Link time = 55 min 25 sec
FEC: 12320 157
CRC: 0 33
ES: 0 31
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 15 minutes time = 13 min 51 sec
FEC: 79 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Previous 15 minutes time = 15 min 0 sec
FEC: 45 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 1 day time = 13 min 51 sec
FEC: 79 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Previous 1 day time = 24 hours 0 sec
FEC: 12357 158
CRC: 534 33
ES: 10 31
SES: 10 0
UAS: 37 27
LOS: 1 0
LOF: 7 0
LOM: 0 0
Total time = 1 days 13 min 51 sec
FEC: 123675 8300
CRC: 1699 437
ES: 32 404
SES: 30 0
UAS: 115 85
LOS: 2 0
LOF: 14 0
LOM: 0 0
======================================