A ver, ya tengo los resultados:
Con el router recién conectado, y sin poner nada de snr ni nada:
Statistics -- ADSL
Mode: ADSL2+
Line Coding: Trellis On
Status: No Defect
Link Power State: L0
Downstream Upstream
SNR Margin (dB): 8.9 9.5
Attenuation (dB): 50.5 24.4
Output Power (dBm): 0.0 0.0
Attainable Rate (Kbps): 7952 18856
Rate (Kbps): 7815 829
MSGc (number of bytes in overhead channel message): 59 8
B (number of bytes in Mux Data Frame): 244 111
M (number of Mux Data Frames in FEC Data Frame): 1 1
T (Mux Data Frames over sync bytes): 1 1
R (number of check bytes in FEC Data Frame): 10 16
S (ratio of FEC over PMD Data Frame length): 0.9990 4.2845
L (number of bits in PMD Data Frame): 2042 239
D (interleaver depth): 64 8
Delay (msec): 15 8
Super Frames: 8497 8495
Super Frame Errors: 2 1
RS Words: 552364 577660
RS Correctable Errors: 909 14
RS Uncorrectable Errors: 6 N/A
HEC Errors: 2 0
OCD Errors: 0 0
LCD Errors: 0 0
Total Cells: 2542980 269802
Data Cells: 12274 2791
Bit Errors: 0 0
Total ES: 2 1
Total SES: 0 0
Total UAS: 13 0
Ahora, nada más ponerlo en modo GDMT (según la foto de Comtrend), y sin tocar nada más:
Statistics -- ADSL
Mode: G.DMT
Type: Interleave
Line Coding: Trellis On
Status: No Defect
Link Power State: L0
Downstream Upstream
SNR Margin (dB): 9.3 11.0
Attenuation (dB): 45.5 21.0
Output Power (dBm): 19.8 12.5
Attainable Rate (Kbps): 5760 1056
Rate (Kbps): 5088 928
K (number of bytes in DMT frame): 160 30
R (number of check bytes in RS code word): 16 8
S (RS code word size in DMT frame): 1 8
D (interleaver depth): 64 8
Delay (msec): 16 16
Super Frames: 2704 2702
Super Frame Errors: 0 6
RS Words: 183898 22967
RS Correctable Errors: 185 18
RS Uncorrectable Errors: 0 N/A
HEC Errors: 0 4
OCD Errors: 0 0
LCD Errors: 0 0
Total Cells: 554262 0
Data Cells: 473 0
Bit Errors: 0 0
Total ES: 2 1
Total SES: 0 0
Total UAS: 29 0
Y ahora, cambiando de nuevo al modo ADSL2+, pero poniendo el comando "adsl configure --snr 140", consigo llegar a esto:
Statistics -- ADSL
Mode: ADSL2+
Line Coding: Trellis On
Status: No Defect
Link Power State: L0
Downstream Upstream
SNR Margin (dB): 11.9 9.0
Attenuation (dB): 50.5 24.4
Output Power (dBm): 21.1 0.0
Attainable Rate (Kbps): 6736 18880
Rate (Kbps): 6631 829
MSGc (number of bytes in overhead channel message): 59 8
B (number of bytes in Mux Data Frame): 103 111
M (number of Mux Data Frames in FEC Data Frame): 2 1
T (Mux Data Frames over sync bytes): 2 1
R (number of check bytes in FEC Data Frame): 10 16
S (ratio of FEC over PMD Data Frame length): 0.9989 4.2845
L (number of bits in PMD Data Frame): 1746 239
D (interleaver depth): 64 8
Delay (msec): 15 8
Super Frames: 1292 1290
Super Frame Errors: 0 0
RS Words: 84014 87720
RS Correctable Errors: 74 0
RS Uncorrectable Errors: 0 N/A
HEC Errors: 0 0
OCD Errors: 0 0
LCD Errors: 0 0
Total Cells: 324187 0
Data Cells: 85 0
Bit Errors: 0 0
Total ES: 0 1
Total SES: 0 0
Total UAS: 28 0
Así que, para llegar a algo más de 7 megas, tengo que poner ADSL2+ y el snr en 120. Lo que no sé es si se caerá la conexión.
Bueno, seguiré haciendo pruebas.
Por cierto, he probado a meterle el comando ese estando en modo GDMT, y al reiniciar el router se ha puesto él sólo en modo ADSL2+, aún estando esa casilla desmarcada. Imagino que será normal.