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Interleaving and Target SNR
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Interleaving and Target SNR
26-03-2013 12:21 PM
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Hi All,
I recently changed from from Extra to Plusnet Unlimited and at the same time had the pro option removed. This appears to have caused Interleaving to be applied and the Target SNR to be increased from 3dB to 6dB.
This has had the effect of my speed being reduced from about 24 to 19.5 Mbps. I live next door to the telephone exchange and have a very stable line.
I have asked to be moved to "Fastpath" which has been now been done and this has increased the speed to 21.6 Mbps but the Target SNR remains at 6dB .
My question is "Do I have to ask PlusNet to have the dslam reset or will it automatically lower the target SNR when it sees the line as very stable" and get me back to 24 Mbps .
Service is ADSL2+ and Router the TG282n.
Thanks
I recently changed from from Extra to Plusnet Unlimited and at the same time had the pro option removed. This appears to have caused Interleaving to be applied and the Target SNR to be increased from 3dB to 6dB.
This has had the effect of my speed being reduced from about 24 to 19.5 Mbps. I live next door to the telephone exchange and have a very stable line.
I have asked to be moved to "Fastpath" which has been now been done and this has increased the speed to 21.6 Mbps but the Target SNR remains at 6dB .
My question is "Do I have to ask PlusNet to have the dslam reset or will it automatically lower the target SNR when it sees the line as very stable" and get me back to 24 Mbps .
Service is ADSL2+ and Router the TG282n.
Thanks
Message 1 of 6
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Re: Interleaving and Target SNR
26-03-2013 3:04 PM
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Hi there,
Understand what you're saying but it's not possible for an account type change to cause any drops in sync, which would be what caused the DLM system to change the profile and SNR.
Either way things should improve as long as the line remains stable - how long is it since the line was put back on to fastpath?
Understand what you're saying but it's not possible for an account type change to cause any drops in sync, which would be what caused the DLM system to change the profile and SNR.
Either way things should improve as long as the line remains stable - how long is it since the line was put back on to fastpath?
Message 2 of 6
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Re: Interleaving and Target SNR
26-03-2013 5:16 PM
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I thought that might have been the case. Just a coincidence I guess.
As to why the dslam "decided" to switch to interleaved and increase the SNR to 6dB is a mystery. I've not had any problems that I have been aware off. It's only been 24 hours since the change to fastpath and I only have had a handful of CRC errors so the line is pretty stable.
What I am asking is "Will the dslam automatically retrain the line and modify the target SNR margin if it sees a stable line over the next few days or will it require manual intervention?
I'm quite happy with the service but 24Mbps looks a lot better than 21.5Mbps.
Thanks.
As to why the dslam "decided" to switch to interleaved and increase the SNR to 6dB is a mystery. I've not had any problems that I have been aware off. It's only been 24 hours since the change to fastpath and I only have had a handful of CRC errors so the line is pretty stable.
What I am asking is "Will the dslam automatically retrain the line and modify the target SNR margin if it sees a stable line over the next few days or will it require manual intervention?
I'm quite happy with the service but 24Mbps looks a lot better than 21.5Mbps.
Thanks.
Message 3 of 6
(578 Views)
Re: Interleaving and Target SNR
26-03-2013 5:22 PM
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To answer - it should do. In practice however it may not. I'll check it again in a couple of days and if there's been no change we'll do an SNR reset and reduce the SNR manually for you.
Message 4 of 6
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Re: Interleaving and Target SNR
29-03-2013 10:32 PM
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Hi,
Target SNR is now 3dB and I am now happy. Don't know if this happened automatically or somebody assisted.
Bandwidth (Up/Down) [kbps/kbps]: 1.231 / 23.453
Data Transferred (Sent/Received) [MB/GB]: 177,58 / 2,43
Output Power (Up/Down) [dBm]: 12,0 / 0,0
Line Attenuation (Up/Down) [dB]: 1,9 / 6,5
SN Margin (Up/Down) [dB]: 7,2 / 3,1
Thanks.
Target SNR is now 3dB and I am now happy. Don't know if this happened automatically or somebody assisted.
Bandwidth (Up/Down) [kbps/kbps]: 1.231 / 23.453
Data Transferred (Sent/Received) [MB/GB]: 177,58 / 2,43
Output Power (Up/Down) [dBm]: 12,0 / 0,0
Line Attenuation (Up/Down) [dB]: 1,9 / 6,5
SN Margin (Up/Down) [dB]: 7,2 / 3,1
Thanks.
Message 5 of 6
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Re: Interleaving and Target SNR
02-04-2013 11:44 AM
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Message 6 of 6
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- Re: Interleaving and Target SNR