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Standard User jelv
(knowledge is power) Wed 19-Jun-13 08:49:22
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Re: Sync lost on incoming call on 20CN Marconi exchange


[re: jelv] [link to this post]
 
To wrap this up: my line is now uber stable since I changed to ADSL Max instead of Max Premium. Currently the line has been in sync for nearly 4 weeks with no drops whatsoever:

Up time (Days hh:mm:ss): 27 days, 10:31:45
xDSL Standard: ITU-T G.992.1
xDSL Annex: Annex A
Channel Mode: Fast

Downstream

Noise Margin: 6.0 dB
Bandwidth: 7616 kbps
Attenuation: 21.0 dB
Power: 19.9 dBm

Errors:
FEC: 0
CRC: 177
HEC: 295

Failures since last reset:
LOF: 0
LOS: 0
LPR: 0
ES : 155

Upstream

Noise Margin: 23.0 dB
Bandwidth: 448 kbps
Attenuation: 14.0 dB
Power: 12.0 dBm

Errors:
FEC: 4
CRC: 242
HEC: N/A

Interesting that another side effect of the excrementy Marconi exchange is that I can't get the full 8192 sync in spite of the stats showing clearly it should be possible.

Edit: Replacement of censored word

jelv

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

Edited by jelv (Wed 19-Jun-13 08:51:52)

Standard User XRaySpeX
(eat-sleep-adslguide) Wed 19-Jun-13 09:56:16
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Re: Sync lost on incoming call on 20CN Marconi exchange


[re: jelv] [link to this post]
 
In reply to a post by jelv:
that I can't get the full 8192 sync in spite of the stats showing clearly it should be possible.
Could be you are on Interleaved despite the "Channel Mode: Fast" if that's a Netgear router. Is there a "D:" line in those stats?

1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU => 2010: Orange 16 Meg LLU => 2011: Orange 20 Meg WBC
Standard User yarwell
(sensei) Wed 19-Jun-13 10:23:22
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Re: Sync lost on incoming call on 20CN Marconi exchange


[re: jelv] [link to this post]
 
Noise Margin: 6.0 dB - seems like you can't get 8128 'cos of that.

--

Phil

MaxDSL - goes as fast as it can and doesn't read the line checker first.

MaxDSL diagnostics


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Standard User jelv
(knowledge is power) Wed 19-Jun-13 10:47:13
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Re: Sync lost on incoming call on 20CN Marconi exchange


[re: yarwell] [link to this post]
 
I think the noise margin is the average across the tones actually in use. Marconi 20CN exchanges don't use all the possible ADSL1 tones.

jelv

Plusnet user since November 2001 - not sure for how much longer
Standard User yarwell
(sensei) Wed 19-Jun-13 13:43:30
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Re: Sync lost on incoming call on 20CN Marconi exchange


[re: jelv] [link to this post]
 
I do wish you would stop calling the DSLAM an exchange wink

I get 8128, the vendor code on the DSLAM is TSTC which is TI is that a Marconi DSLAM ? I only get 7616 with some routers, on account of being interleaved and requiring S=1/2 to get the full tilt on 36.5 dB attenuation.

--

Phil

MaxDSL - goes as fast as it can and doesn't read the line checker first.

MaxDSL diagnostics
Standard User jelv
(knowledge is power) Wed 19-Jun-13 15:05:22
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Re: Sync lost on incoming call on 20CN Marconi exchange


[re: yarwell] [link to this post]
 
Sorry - I stand corrected. You are quite right, some exchanges have a mixture of DSLAM suppliers (mine apparently doesn't frown ).

Yet another 'feature' of these DSLAMs appears to be that they don't return a vendor code. I'm on Fastpath (in case you hadn't deduced that from the stats).

jelv

Plusnet user since November 2001 - not sure for how much longer
Standard User yarwell
(sensei) Wed 19-Jun-13 15:33:34
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Re: Sync lost on incoming call on 20CN Marconi exchange


[re: jelv] [link to this post]
 
http://www.kitz.co.uk/adsl/linestats_explanation.htm suggests Marconi is the TSTC chipset. Not all routers report remote chipsets either !

Seems an odd coincidence yours landed at exactly 7616 on Fastpath

--

Phil

MaxDSL - goes as fast as it can and doesn't read the line checker first.

MaxDSL diagnostics
Standard User jelv
(knowledge is power) Wed 19-Jun-13 18:17:35
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Re: Sync lost on incoming call on 20CN Marconi exchange


[re: yarwell] [link to this post]
 
I wonder is there is more than one model/version of Marconi DSLAM?

I don't like coincidences, but as the line is now so stable and is fast enough to stream BBC iPlayer HD I'm not messing about any more.

jelv

Plusnet user since November 2001 - not sure for how much longer
Standard User RobertoS
(sensei) Wed 19-Jun-13 21:51:21
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Re: Sync lost on incoming call on 20CN Marconi exchange


[re: jelv] [link to this post]
 
Strange that you have upstream FECs but not downstream. I have never seen upstream interleaving enabled on BT Wholesale circuits.

As XRaySpeX says, it would be useful to know the D: line in the router stats, and whether or not it is a Netgear.

POI - BT Wholesale version of G.992.1 is capped at 8128kbps, not 8192kbps. O2/Be LLU allows the full whack, I don't know about other LLUs.

My broadband basic info/help site - www.robertos.me.uk | Domains,website and mail hosting - Tsohost.
Connection - Plusnet UnLim Fibre (FTTC). Sync ~ 53.4/16.8Mbps @ 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.

Edited by RobertoS (Wed 19-Jun-13 21:53:20)

Standard User jelv
(knowledge is power) Wed 19-Jun-13 22:35:24
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Re: Sync lost on incoming call on 20CN Marconi exchange


[re: RobertoS] [link to this post]
 
This I think the relevant bit I see in RouterStats (it's a TG582 router):

System Vendor info (showtime): Local Remote
Country code: 0F00 0000
ID: TMMB ----
Specific: 3C61 0000

jelv

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