I'm experiencing something similar, over the last month. In my case line speed has dropped from 40, down to 36, 32 and now 30 Mbps. QLT did not indicate any line noise. Happens about once a week but on different days, and occurs from a hour or so, to several days up to a week before the line stabilises (errors disappear altogether, up to 10% packet loss disappears and max and average latency return to the same as minimum, which stays unaltered throughout according to TBBQM). Only affects download.
My Broadband Ping
Haven't reported anything as the line is still usuable (although there can be what I assumed was a separate problem with DNS resolver), and only seems to drop when it stabilises. Router reboots when it's occurring make no difference.
Stats taken from Fritz!:
Line stable since 6am today
Negotiated Connection Properties
Receive Direction Send Direction
Max. DSLAM throughput kbit/s 30000 6000
Min. DSLAM throughput kbit/s 128 128
Attainable throughput kbit/s 29996 6507
Current throughput kbit/s 29996 6000
Seamless rate adaptation off off
Latency fast fast
Impulse Noise Protection (INP) 44 0
G.INP on off
Signal-to-noise ratio dB 12 7
Bitswap on on
Line attenuation dB 24 24
G.Vector off off
Carrier record A43 A43
Seconds With Not Remediable Errors (CRC)
Errors (ES) Many
Errors (SES) per
FRITZ!Box 0 0 0 0
Central exchange 17 0 0.03 3
Only difference when line is misbehaving is that download attenuation rises to 37 and errors accumulate in the up to hundreds per hour at the Fritz!. Historically (for 6 years) download SNR has been in the 9-11dB range, at a consistent 40Mbps download.
I assumed it was just the underground line suffering from damp as winter turns to spring, and that (new) G.Inp was reacting to the line conditions. I was therefore rather hoping that warmer weather would eventually sort it out.
We see things not as they are, but as we are . - Anais Nin
Edited by smurf46 (Sun 19-Mar-17 18:16:03)