Since installation around 8 months ago my line has been seeing small but gradual improvements. Line length is approx 900m and I get a good quality connection given the distance. SNR margin hovers around 6dB.
I noticed a few days ago SNR had increased to over 9dB and attainable rate also much higher, from around 36000 kbps to 45000 kbps. A power down of the modem and reconnect after just over 30mins had my actual sync rate increase from 31850 to 38675.
Here are some stats taken just after installation
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Max: Upstream rate = 6627 Kbps, Downstream rate = 31440 Kbps
Path: 0, Upstream rate = 6678 Kbps, Downstream rate = 31768 Kbps
Discovery Phase (Initial) Band Plan
US: (0,95) (868,1207) (1972,2783)
DS: (32,859) (1216,1963) (2792,3959)
Medley Phase (Final) Band Plan
US: (0,95) (868,1207)
DS: (32,859) (1216,1963)
VDSL Port Details Upstream Downstream
Attainable Net Data Rate: 6627 kbps 31440 kbps
Actual Aggregate Tx Power: 2.6 dBm 11.4 dBm
============================================================================
VDSL Band Status U0 U1 U2 U3 D1 D2 D3
Line Attenuation(dB): 8.7 45.2 N/A N/A 20.3 55.4 0.1
Signal Attenuation(dB): 8.7 44.8 N/A N/A 20.3 55.4 N/A
SNR Margin(dB): 5.9 6.1 N/A N/A 5.8 5.8 N/A
TX Power(dBm): -8.7 2.3 N/A N/A 9.3 7.2 N/A
And here they are taken today
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 1
Last initialization procedure status: 0
Max: Upstream rate = 7804 Kbps, Downstream rate = 44468 Kbps
Bearer: 0, Upstream rate = 7756 Kbps, Downstream rate = 38675 Kbps
Discovery Phase (Initial) Band Plan
US: (7,32) (871,1205) (1972,2782)
DS: (33,859) (1216,1961) (2793,3970)
Medley Phase (Final) Band Plan
US: (7,32) (871,1205)
DS: (33,859) (1216,1961)
VDSL Port Details Upstream Downst
ream
Attainable Net Data Rate: 7804 kbps 44468 kbps
Actual Aggregate Tx Power: 2.8 dBm 11.5 dBm
================================================================================
====
VDSL Band Status U0 U1 U2
U3 U4 D1 D2 D3
Line Attenuation(dB): 8.7 45.4 N/A N/A N/A 20.4 55.7
84.9
Signal Attenuation(dB): 8.7 44.8 N/A N/A N/A 30.3 55.3
N/A
SNR Margin(dB): 6.1 6.2 N/A N/A N/A 6.1
6.1 N/A
TX Power(dBm): -8.7 2.4 N/A N/A N/A 9.2
7.8 N/A
It's pretty good I think for the line length, but why is it, and what could have changed?