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Administrator MrSaffron
(staff) Thu 19-Sep-13 15:42:41
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Re: Interleaving on ADSL Max


[re: 4M2] [link to this post]
 
The 8128 Kbps bandwidth is for carrying 53 byte packets of data, which actually carry a 48 byte IP payload.

Now do the maths.

Andrew Ferguson, [email protected]
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User 4M2
(knowledge is power) Thu 19-Sep-13 16:54:14
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Re: Interleaving on ADSL Max


[re: MrSaffron] [link to this post]
 
In reply to a post by MrSaffron:
The 8128 Kbps bandwidth is for carrying 53 byte packets of data, which actually carry a 48 byte IP payload.

Now do the maths.


8128Kbps - 635Kbps = 7493Kbps when headers are subtracted? smile
Standard User jelv
(knowledge is power) Thu 19-Sep-13 17:32:16
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Re: Interleaving on ADSL Max


[re: adslmax] [link to this post]
 
My current 20CN ADSL Max Premium stats:

Noise Margin: 6.6 dB
Bandwidth: 8128 kbps
Attenuation: 20.5 dB
Power: 19.9 dBm

Errors:
FEC: 479
CRC: 13
HEC: 140

As you can see I'm on interleaved as I have FEC errors and have a full 8128 sync.

jelv

Plusnet user since November 2001 - not sure for how much longer


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Administrator MrSaffron
(staff) Thu 19-Sep-13 17:35:17
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Re: Interleaving on ADSL Max


[re: 4M2] [link to this post]
 
8128 Kbps or 153 packets per second

153 packets carry an IP payload of 153*48=7344 Kbps

So yes potential for a massive improvement of around 3%. Those with WBC will seen these improvements already of course due to the dynamic IP Profile.

Andrew Ferguson, [email protected]
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User 4M2
(knowledge is power) Thu 19-Sep-13 17:54:37
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Re: Interleaving on ADSL Max


[re: MrSaffron] [link to this post]
 
In reply to a post by MrSaffron:
8128 Kbps or 153 packets per second


Please explain how you calculated a figure of 153 packets per second?
Standard User adslmax
(knowledge is power) Thu 19-Sep-13 19:26:27
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Re: Interleaving on ADSL Max


[re: 4M2] [link to this post]
 
In reply to a post by jelv:
My current 20CN ADSL Max Premium stats:

Noise Margin: 6.6 dB
Bandwidth: 8128 kbps
Attenuation: 20.5 dB
Power: 19.9 dBm

Errors:
FEC: 479
CRC: 13
HEC: 140

As you can see I'm on interleaved as I have FEC errors and have a full 8128 sync.


U aren't on interleaved because if u are, it would be sync rate at 7616k!

plusnetADSL2+15.7 Meg
Administrator MrSaffron
(staff) Thu 19-Sep-13 20:12:18
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Re: Interleaving on ADSL Max


[re: 4M2] [link to this post]
 
8128 / 53 ie size of the atm packet

Andrew Ferguson, [email protected]
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User jelv
(knowledge is power) Thu 19-Sep-13 21:13:15
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Re: Interleaving on ADSL Max


[re: adslmax] [link to this post]
 
1. If I was on Fastpath there would be no FEC errors - you can only get them when interleaving is on.

2. The router reports:

xdsl info expand=enabled
Physical Layer Statistics:

Modem state: up
Up time (Days hh:mm:ss): 2 days, 8:37:33
xDSL Standard: ITU-T G.992.1
xDSL Annex: Annex A
Channel Mode: Interleaved

3. As part of the diagnosis of a recent problem Plusnet asked for interleaving to be turned on, I saw a jump in the latency.

PS It would help if you learned how to post to this forum properly - you posted as a reply to a post by 4M2, not as a reply to my post.

jelv

Plusnet user since November 2001 - not sure for how much longer

Edited by jelv (Thu 19-Sep-13 21:17:37)

Standard User RobertoS
(sensei) Thu 19-Sep-13 21:32:14
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Re: Interleaving on ADSL Max


[re: adslmax] [link to this post]
 
In reply to a post by adslmax:
U aren't on interleaved because if u are, it would be sync rate at 7616k!
Wrong. IIRC, already discussed. If router and DSLAM are both Broadcom based, it just needs the right firmwares and settings.

My broadband basic info/help site - www.robertos.me.uk | Domains,website and mail hosting - Tsohost.
Connection - Plusnet UnLim Fibre (FTTC). Sync ~ 51.8/16.8Mbps @ 600m. - BQM

"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Allergy information: This post was manufactured in an environment where nuts are present. It may include traces of understatement, litotes and humour.
Standard User adslmax
(knowledge is power) Thu 19-Sep-13 21:41:55
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Re: Interleaving on ADSL Max


[re: RobertoS] [link to this post]
 
In reply to a post by RobertoS:
In reply to a post by adslmax:
U aren't on interleaved because if u are, it would be sync rate at 7616k!
Wrong. IIRC, already discussed. If router and DSLAM are both Broadcom based, it just needs the right firmwares and settings.


ah ok then.

plusnetADSL2+16 Meg
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