My line stats about 3.1 Km from the exchange ,
I sync at around 5,800 Kbps daytime but at night it drops to around 5,000 at night due to noise on ther line , (street lighting etc ), this lowers my SNR down from 10.5 to 7 , this increases
errors below SNR of 9 , a resync of the router cures this ,
Uptime: 0 days, 0:28:07
Modulation: G.992.1 Annex A
Bandwidth (Up/Down) [kbps/kbps]: 448 / 5,888
Data Transferred (Sent/Received) [KB/MB]: 897.00 / 9.21
Output Power (Up/Down) [dBm]: 11.5 / 19.5
Line Attenuation (Up/Down) [dB]: 25.0 / 47.0
SN Margin (Up/Down) [dB]: 17.0 / 10.5
Vendor ID (Local/Remote): TMMB / GSPN
Loss of Framing (Local/Remote): 0 / 0
Loss of Signal (Local/Remote): 0 / 0
Loss of Power (Local/Remote): 0 / 0
Loss of Link (Remote): 0
Error Seconds (Local/Remote): 1 / 0
FEC Errors (Up/Down): 12 / 210
CRC Errors (Up/Down): 8 / 10
HEC Errors (Up/Down): 2 / 1
Line attenuation is in relation to the "loop loss" on your line. The lower this figure the better, and the better chance you have of getting the faster speeds.
SNR is Signal to Noise Ratio - in other words a measurement in decibels of the Signal strength to the level of Noise on the line.
The higher your SNR is, the better, as there is less background Noise.