What a difference a sync makes

[Lance]

Rik is running the SBC firmware on the 2wire 2700HGV, which for some reason initiates a reboot or resync every 300 hours

I run my router 24/7.

Over the last half hour or so, my noise margin has been going between 5 and 6, and now seems settled on 5.

[Lance]

Update on my line...

Noise margin dropped to 4db at 8:35pm and to 3db at 9:13pm. It dropped to 2db at 9:49pm and that is where it is quite happily sitting at the moment. On my line, at the current sync, that is amazing!

[Sebby]

It looks like it's all sorted then, Lance.

If you want, you could force a re-sync at night so that your SNRM is 6dB at worse, but if there are no problems, you could equally leave it alone.

With regards to the 12 day/300 hour thing, it's something that Rik and I (and undoubtedly others) experience with the single SSID 2700HG running SBC firmware. There doesn't seem to be any real reason for it. I've now got myself a dual SSID with BT firmware, and it doesn't reboot.

[Rik]

The 2700 with SBC firmware re-boots itself every 300 hours (12.5 days), Baz, which means it often picks up poor speeds on alternative re-boots due to time of day.

[Lance]

Further update, my line kept sync all night, and is now happily back to the usual 6db. Fantastic!

Shame it's not quite high enough for a 5mb profile!

edit: I've had 3,570,373 FECs and 2,245 CRCs since 15:10 yesterday.

[Rik]

Now, now, don't get greedy.

[Sebby]

You can usually try for the next profile, but stability is more important!

[Lance]

Indeed. I don't think I could sync any higher and be stable. I'll just make do 

[Lance]

Again, last night my line kept sync all night at the high sync. The noise margin dropped as low as 1db at around 10:30pm for about 10 mins but then went back up to 2db.

It does seem that getting my exchange side cable swapped has done the world of good!

[madasahatter]

The 2700 with SBC firmware re-boots itself every 300 hours (12.5 days), Baz, which means it often picks up poor speeds on alternative re-boots due to time of day.

Does anyone know exactly why it does that, or is it just one of lifes great modern mysteries? 

[Rik]

It does seem that getting my exchange side cable swapped has done the world of good!

 

[Rik]

Does anyone know exactly why it does that, or is it just one of lifes great modern mysteries? 

We don't know why, Mad, it just seems to be something in the code. Possibly deliberate, probably accidental. It does trigger a full re-boot, though, not just a re-sync, so it's possible it was done for a reason.

[Lance]

Damn. At 10:22 this morning, my line dropped sync to 4832, but it seems I now have a 9db noise margin target 

[Rik]

BT working anywhere nearby, Lance?

[Lance]

It's possible, but I'm not going out today so won't be able to see. Too much revision to do!

[Rik]

Send Nicky on an area search.

[Sebby]

It does seem that getting my exchange side cable swapped has done the world of good!

Brilliant.

[Sebby]

Damn. At 10:22 this morning, my line dropped sync to 4832, but it seems I now have a 9db noise margin target 

I don't think that's necessarily a bad thing. Once you're used to a slightly lower sync, you'll find that you worry a lot less with a target of 9dB as there's so much more margin. Rik and I both have 9dB margins and wouldn't have it any other way.

[Rik]

Yes I would. I'd like to sync at 8128 with a margin of 15db or more.

[Sebby]

So true...

[Lance]

To be honest, a sync of 4832 is more than I used to get before I had the 2wire and as it's solidly in the middle of the 4Mb profile, I'm happy

[Sebby]

I get a very similar sync to you, Lanc (usually between 4.6 and 4.8Mb). What's your attenuation, out of interest?

[Lance]

At this very moment 52.3

[Sebby]

So it sounds like you're actually doing better than me, given that my attenuation is 47.5dB.

I also had problems with a target SNRM of 6dB and it kept shooting up to 15dB, so I had it set manually at 9dB and it's solid as a rock; the SNRM moves only about 1dB at night.

[Rik]

Same here, at 6db the line was flaky. At 9db, the most variation I see normally is -2db, but generally it's only -1db. Of course, the Netgear was a different story...