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Standard User Mxx
(newbie) Sun 03-Apr-11 16:11:58
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problem with upstream on adslmax


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Hi. over the last month my internet sync has re-sync'd alot more then normal. Everytime it does i notice the Upstream gets lower and lower as well as the downstream.

I have a BT 2wire on a long line, thats normally very stable with interleaving off.

Down Up
Rate: 1088 kbs 448 kbs
Max Rate: 1132 kbs 448 kbs
Noise Margin: 12.0 dB 7.0 dB
Attenuation: 63.0 dB 31.5 dB
Output Power: 16.4 dBm 12.4 dBm

Protocol: G.DMT Annex A
Channel: Fast
DSLAM Vendor Information Country: {46336} Vendor: {TSTC} Specific: {0 }
ATM PVC: 0/38

Rate Cap: 1132 kbs
Attenuation @ 300kHz: 63.0 dB
Uncanceled Echo: -12.1 dB Ok
VCXO Frequency Offset: 18.0 ppm Ok
Final Receive Gain: 34.5 dB Ok
Impulse Noise Comp. Tones: 0 Ok
Excessive Impulse Noise: 0 Ok

Actual Attenuation is 67db downstream.
In the 2wire log i can see the following stats:

1056 1072 1108 1108 12.3 2.0 67.8 16.2 685 0 0.00 0.25 544 572 8.0 31.5 12.4 4461 52 G.DMT Annex A TI 237/104 ERR_LOF_LIMIT -7.6 16.4 34.5 0

The 4461 figure is the CRC count at time of resync. And 544 was the upstream sync.
12.3 was the starting mgn. and 2 was the eventual.

Any idea what could be going on?

Forgot to add after a few days 1-3 the upstream will resync at 768kb/s again.

Edited by Mxx (Sun 03-Apr-11 16:12:49)

Standard User john2007
(legend) Sun 03-Apr-11 16:20:53
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Re: problem with upstream on adslmax


[re: Mxx] [link to this post]
 
Perhaps download RouterStats and monitor the line to see if a pattern emerges.

http://www.vwlowen.co.uk/internet/files.htm
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