After 10+ days of rock solid connection, just had a momentary power cut... which has dropped sync to 76.496Mbps and upped margin to 4.1dB.

I might look into one of those 12V mini-UPS blocks.

It should auto-correct back to ~3dB in two days. Maybe even Sunday night. Don't mess .

Fingers crossed, leaving well alone.

Been out this afternoon, just got back in to find it's re-synced at around 7.15PM, back to 3dB and 79Mb.

I make that about 24 hours (and 15 mins) since power cut?

😉

Another damn power cut again this morning, resynced again at 80/20, but look at the noise margins?

DSL uptime:0 days,00 Hours28 Mins41 Secs
Data rate:19.999 Mbps / 79.999 Mbps
Maximum data rate:25.239 Mbps / 80.946 Mbps
Noise margin:9.2 / 2.3
Line attenuation:7.2 / 13.1
Signal attenuation:7.2 / 14.5
VLAN id:101
Upstream error control:Off
Downstream error control:Off

What's going on there? Why has it dropped the margin that low?

This is typical when there is an area power cut, my HG612 does the same it syncs at 3dB at 80Mbps downstream then other modems come back up and increase the noise and crosstalk, so reducing the SNRM, mine has been running at 1.6dB for the last 9 days with no errors on the downstream. If I resync it will not achieve 80Mpbs but a bit lower.

In reply to a post by Realalemadrid:

This is typical when there is an area power cut, my HG612 does the same it syncs at 3dB at 80Mbps downstream then other modems come back up and increase the noise and crosstalk, so reducing the SNRM, mine has been running at 1.6dB for the last 9 days with no errors on the downstream. If I resync it will not achieve 80Mpbs but a bit lower.

Ah yes, that makes sense. Thanks!

When we have these power cuts, I notice that our Smart Hub 2 and another one locally are the first two routers in range that fire up a wifi signal, so I guess they're the quickest booting. All the other assortment of routers follow shortly after.

You can tell the Smart Hub 2s as the access point is BT-nnXXXX, rather than BTHub6-XXXX

Aaaargh! Another power cut....

DSL uptime:0 days,00 Hours34 Mins29 Secs
Data rate:19.999 Mbps / 75.911 Mbps
Maximum data rate:25.071 Mbps / 81.247 Mbps
Noise margin:14.5 / 4.1
Line attenuation:7.0 / 13.5

Getting a bit fed up with this power outage business now, I'm getting onto the DNO.

edit: They've been working on an HV fault, unconnected to the blips we've had over the last few weeks. I've never known so many power cuts as we've had in the last month or two!

Edited by sparky_paul (Fri 31-Jul-20 13:16:01)

I have one of these for my ONT - lasts for a couple of hours if required,

12V UPS