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Author Topic: Daily SNRM drops  (Read 143 times)

g3uiss

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Daily SNRM drops
« on: May 19, 2020, 09:34:37 AM »

https://forum.kitz.co.uk/index.php/topic,22532.45.html

Having tried all the helpful recommendations in the old post above, nothing has solved the problem. I know @kitz has a similar problem, but mine is EXACTLY the same time daily. A daily resync on ADSL2 is not in its self a major problem, and if I didnít know I likely might not know.

However similar to @kitz occasionally the resync happens during the burst giving a high SNRM and ES needing a manual resync to sort. Also it drops my VPN, again this re syncs but potential at a low speed.

Given OR wouldnít be able to find this, are there any mitigationís I could try to try and hang on to sync. Perhaps getting the SNRM altered to 9db so a drop might not go to minus and hold sync ? Or having the line interleaved? I would "Cap" the speed, but I don't think you can do that with ADSL2 on a HG612 ?

My VDSL circuit suffers the same but a small dip in SNRM for the same CRC burst, and ES burst, and always stays in sync. Iím assuming the interference is either at the lower tones, or nearer the exchange than the cab. Hence the reduced effect on my VDSL.

Suggestions welcome.

Tony
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Zen FTTC and Plusnet ADSL HG612 modems with Vigor 2925

burakkucat

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Re: Daily SNRM drops
« Reply #1 on: May 19, 2020, 03:45:17 PM »

As the circuit is currently configured as fast-path, the first thing I would try is interleaving.
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g3uiss

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Re: Daily SNRM drops
« Reply #2 on: May 19, 2020, 04:48:03 PM »

Thanks @bcat I will request that to be applied.
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Zen FTTC and Plusnet ADSL HG612 modems with Vigor 2925