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help with new router stats

nogginthenog
Grafter
Posts: 78
Registered: ‎23-08-2007

help with new router stats

just upgraded my old Thomson 585 v7 router to a new billion 770n
old line stats are:
Link Information

Uptime: 8 days, 16:41:35
DSL Type: G.992.1 annex A
Bandwidth (Up/Down) [kbps/kbps]: 448 / 8,128
Data Transferred (Sent/Received) [kB/kB]: 0.00 / 7.00
Output Power (Up/Down) [dBm]: 11.5 / 11.5
Line Attenuation (Up/Down) [dB]: 5.0 / 6.0
SN Margin (Up/Down) [dB]: 23.0 / 7.0
Vendor ID (Local/Remote): TMMB / ALCB
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): 0 / 0
FEC Errors (Up/Down): 0 / 0
CRC Errors (Up/Down): 0 / 1,794
HEC Errors (Up/Down): 0 / 99
new linestats
Mode: ADSL_G.dmt
Traffic Type: ATM
Status: Up
Link Power State: L0

Downstream Upstream
Line Coding(Trellis): On On
SNR Margin (0.1 dB): 143 240
Attenuation (0.1 dB): 80 60
Output Power (0.1 dBm): 177 118
Attainable Rate (Kbps): 10592 1080
Path 0 Path 1
Downstream Upstream Downstream Upstream
Rate (Kbps): 8128 448 0 0

K (number of bytes in DMT frame): 255 15 0 0
R (number of check bytes in RS code word): 0 0 0 0
S (RS code word size in DMT frame): 0.50 1.00 0.0 0.0
D (interleaver depth): 1 1 0 0
Delay (msec): 0.13 0.25 0.0 0.0
INP (DMT symbol): 0.00 0.00 0.0 0.0
i am a bit confused by the difference in attainable rate and SNR figures
are these figures better? any help most appreciated
2 REPLIES
sjrinfroyle
Grafter
Posts: 895
Registered: ‎08-05-2011

Re: help with new router stats

Was there anything you were trying to achieve? As you sync at the max rate getting a different router won't make a difference.
Community Veteran
Posts: 1,412
Thanks: 4
Registered: ‎29-01-2009

Re: help with new router stats

Your old figure had an attenuation of 6dB, suggesting you live in the flat above the exchange!
With that, I'd expect you to get the maximum speed  - 8128 is the max for ADSL1 technology, so that looks fine.
But I'd have expected you to have a much higher SNR figure than 7dB. Not, in this case, because you were suffering from noise. Because you are close, I'd expect you to just have a lot of unused SNR overhead.
The new figures change slightly, and the 8dB attenuation moves you away from the exchange by 200 metres (to 600 metres).
Now you achieve the same speed, but the SNR moves up to 14.3dB, showing (more correctly) that you have an awful lot of spare overhead before noise threatens your speed.
But even with an attenuation of 8dB, you'd still sync at a full 24Mbps on ADSL2+... if the exchange had the equipment.
Plusnet Customer
Using FTTC since 2011. Currently on 80/20 Unlimited Fibre Extra.