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Regular Netgear DG834G drop-outs

From: Peter (BOUGHTONP)30 Dec 2011 19:05
To: ALL1 of 5
39215.1
My parent's router often has spats where it will regularly lose Internet access.

It's a Netgear DG834G running firmware V4.01.06

Poking around the admin pages doesn't provide anything particularly useful/meaningful to me, but there are various logs and statistics.

Line attenuation is currently listed at 33 db which I think is a reasonable figure?
Noise margin is 6 db ... or 9 db now (I guess these values fluctuate).

Here's some logs from when the problem started today:
quote:
Fri, 2011-12-30 17:24:02 - LCP down.
Fri, 2011-12-30 17:24:04 - Initialize LCP.
Fri, 2011-12-30 17:24:12 - LCP is allowed to come up.
Fri, 2011-12-30 17:24:12 - CHAP authentication success
Fri, 2011-12-30 17:24:13 - Loss of synchronization :1004
Fri, 2011-12-30 17:25:12 - LCP down.
Fri, 2011-12-30 17:25:13 - Loss of synchronization :1005
Fri, 2011-12-30 17:25:14 - Initialize LCP.
Fri, 2011-12-30 17:25:22 - LCP is allowed to come up.
Fri, 2011-12-30 17:25:22 - CHAP authentication success
Fri, 2011-12-30 17:26:42 - LCP down.
Fri, 2011-12-30 17:26:43 - Loss of synchronization :1006
Fri, 2011-12-30 17:26:44 - Initialize LCP.
Fri, 2011-12-30 17:26:52 - LCP is allowed to come up.
Fri, 2011-12-30 17:26:52 - CHAP authentication success
[snip]
Fri, 2011-12-30 17:50:14 - Loss of synchronization :1036
Fri, 2011-12-30 17:50:44 - LCP down.
Fri, 2011-12-30 17:50:44 - Loss of synchronization :1037
Fri, 2011-12-30 17:50:46 - Initialize LCP.
Fri, 2011-12-30 17:51:24 - LCP is allowed to come up.
Fri, 2011-12-30 17:51:24 - CHAP authentication success
Fri, 2011-12-30 17:51:44 - Loss of synchronization :1038
Fri, 2011-12-30 17:52:14 - LCP down.
Fri, 2011-12-30 17:52:14 - Loss of synchronization :1039
Fri, 2011-12-30 17:52:16 - Initialize LCP.
Fri, 2011-12-30 17:52:24 - LCP is allowed to come up.
Fri, 2011-12-30 17:52:24 - CHAP authentication success
Fri, 2011-12-30 17:53:14 - Loss of synchronization :1040

(unsnipped version attached, but it's all very repetitive)

I've tried searching for those terms but haven't found anything conclusive.

Any network experts here able to offer any advice?
EDITED: 30 Dec 2011 19:09 by BOUGHTONP
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From: Ixion30 Dec 2011 19:31
To: Peter (BOUGHTONP) 2 of 5
39215.2 In reply to 39215.1
Sounds like a fault somewhere on the line, have they got any unfiltered telephone extensions/tried removing the bell wire from the master socket/ tried different filters, if all that fails I would try rining their ISP and ask them to do a line check.
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From: Peter (BOUGHTONP)30 Dec 2011 19:49
To: Ixion 3 of 5
39215.3 In reply to 39215.2
Thanks, will check those things out.

(I think there's an extension, but no idea if filtered or not.)

My mum has just mentioned that BT are doing things to improve broadband in this area, so might be related to that.
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From: Ixion31 Dec 2011 17:16
To: Peter (BOUGHTONP) 4 of 5
39215.4 In reply to 39215.3
Sounds likely to me, they usually mess something up when they tinker.
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From: PNCOOL 3 Jan 2012 12:54
To: Peter (BOUGHTONP) 5 of 5
39215.5 In reply to 39215.1
When it has a spat, if they try clearing the NAT table for it, does it start working again? I had one of those (although I think it was the GT) that would fill it's NAT table and then fall over. Touch wood, my other identical model is still running fine.
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