General Discussion
  >> Fibre Broadband

Register (or login) on our website and you will not see this ad.

  Print Thread
Standard User AndyT99
(newbie) Mon 23-Apr-12 20:38:10
Print Post

SNR question

[link to this post]
Hi Everyone,

I'm thinking of going for the upgrade to 80MB, my VDSL router reports a downstream SNR of 19dB for a full 40meg sync, anyone any thoughts on what speed I would get on 80Mb.

The only reason I ask is because I've never trusted the BT checker, it's always reported wrong info about the line!

Thanks in advance
Standard User adebov
(eat-sleep-adslguide) Mon 23-Apr-12 21:42:56
Print Post

Re: SNR question

[re: AndyT99] [link to this post]
These were my figures during the first month or so (haven't checked since)

VDSL Port Details Upstream Downstream
Attainable Net Data Rate: 17475 kbps 47156 kbps
Actual Aggregate Tx Power: - 16.1 dBm 10.3 dBm
VDSL Band Status U0 U1 U2 U3 D1 D2 D3
Line Attenuation(dB): 3.6 16.0 N/A N/A 8.8 19.8 N/A

Signal Attenuation(dB): 0.0 14.9 N/A N/A 8.8 19.8 N/A

SNR Margin(dB): 21.8 21.8 N/A N/A 10.7 11.4 N/A

TX Power(dBm): -28.6 -16.5 N/A N/A 9.5 2.6 N/A

So you can see I had SNR margin of around 11dB (average of the two downstream figures) when connecting at full 40Mbps speed.
The max attainable rate, reported by the modem, was 47Mbps.
The BT estimator (last week) guessed at around 60Mbps.
I had the 80/20 upgrade activated this morning and have an IP profile of 77.43Mbps (which probably means I'm connecting at, or very close to, maximum speed).


vDSL2 FTTC Infinity with BT
DL Sync 80Mbps
UL Sync 20Mbps
Standard User Bald_Eagle1
(committed) Mon 23-Apr-12 22:29:18
Print Post

Re: SNR question

[re: adebov] [link to this post]
FWIW, IP Profile should be 96.79% of sync speed for FTTC connections.

96.79% of 80Mb = 77.432Mb, so yes, your connection has indeed synced at the Full Monty.

Register (or login) on our website and you will not see this ad.

Standard User paul1360
(member) Tue 24-Apr-12 11:18:52
Print Post

Re: SNR question

[re: Bald_Eagle1] [link to this post]
My IP profile is also 77.43Mb and I get a shade under at 76.85Mb down.
Up is 20Mb and I am getting 17/18Mb.
Hope this helps.
iechyd da

  Print Thread

Jump to