OK, here's the router stats panel for 2nd Jan this year https://picasaweb.google.com/lh/photo/UjC-fPKAdkK8k3...

It shows system up time of 23:05:15 (top left) and a WAN up time of 16:37:52, which indicates that there was at least one disconnect in that period. The snapshot was taken at 13:46, so it was left running overnight and had re-connected at 21:09 on 1st Jan.

Unfortunately, I can't find anywhere the router shows line error details, and it appears not to log them. Any thoughts on how I might get access to them?

Does the router do Telnet? Some Netgears do. E.g. Netgear DG834/DG834G - Check Interleaving Status

I had a look at your routers manual and don't think it gives any error statistics which is poor and it doesn't seem to be supported by DD-WRT either so it looks like the errors will remain a mystery.

It has a definite uptime of 16 hours which may well be a lot more by now. There is no actual proof it dropped sync either as your graphings didn't show any loss of sync. It may well be that it was the PPPoE session that got dropped rather than the physical sync and that would almost certainly just be the ISP bouncing idle sessions off for the purpose of load balancing. I know my ISP (Plusnet) does this as I have stuff running 24x7 and a fixed IP yet the gateway I'm attached to sometimes changes.

Here's the user guide - http://www.downloads.netgear.com/files/GDC/DGND4000/...

It doesn't support telnet, ssh, snmp, or anything else that might be of use in diagnosing a problem with the line so far as I can see.

In reply to a post by kwikbreaks:

Here's the user guide - http://www.downloads.netgear.com/files/GDC/DGND4000/...
It doesn't support telnet, ssh, snmp, or anything else that might be of use in diagnosing a problem with the line so far as I can see.

So it would seem. I do have a D-Link DSL-320B Modem and an unlocked HG612. I'll have to check on the capabilities, firmware support, for the former, and the latter is unfortunately some 300 odd miles away, and I won't be able to retrieve it until towards the end of February. One way or another it looks as though I'm going to have to learn how to use telnet...

Thanks for all your inputs so far, the resources of these forums are indispensible and greatly appreciated.

There is likely to be reduced traffic from me as we shall shortly be moving north for 3 or 4 weeks. I will still be monitoring and responding to inputs however. At least I'll be coming back with the HG612...

Edited by Mygri (Fri 09-Jan-15 11:54:46)

In reply to a post by Mygri:

There is likely to be reduced traffic from me as we shall shortly be moving north for 3 or 4 weeks. I will still be monitoring and responding to inputs however. At least I'll be coming back with the HG612...

You might be lucky ... I think the Internet actually ventures north of Watford!

I imagine you'll have seen kwikbreak's posts on this aspect and I've just posted a response. There seems to be a way to go yet...

In reply to a post by MHC:

You might be lucky ... I think the Internet actually ventures north of Watford!

So rumour has it! We'll be in Liverpool, and it will be the 4th or 5th visit (family). Because of a complete cock-up (not mine) over internet availability, I've had to resort to 4G. Not cheap, but so far it has worked well.

Edited by Mygri (Fri 09-Jan-15 11:35:38)

In reply to a post by Mygri:

In reply to a post by MHC:

You might be lucky ... I think the Internet actually ventures north of Watford!

So rumour has it! We'll be in Liverpool, and it will be the 4th or 5th visit (family).

Be careful ... they might even nick your Internet electrons if they stand still for too long!

Nothing stays still for long in Liverpool. It's too windy, and when it's a cold wind it's horrible.