Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[roseway]

There's nothing strange about that. It's not a matter of just pressing a button and immediately the whole country is switched over. I've no idea how it's being rolled out, but I'm sure it will be done in stages.

[simoncraddock]

It will be in stages.  It would be chaos if they disconnected everyone at the same time. The servers at ISPs that handle your login would probably crash due to the volume of attempts to log back on.

[Ixel]

I imagine it will probably be changes to DLM, so G.INP probably won't be noticed until the next time it needs to take action unfortunately. Whether G.INP will be either used on fastpath, replace interleaved profiles, or something else altogether, I have no idea. But one thing I'm guessing is that G.INP won't be active all of the time (unlike in Ireland with Eircom for example).

A few possibilities are:
1) Fastpath with G.INP <=> Interleaved
2) Fastpath <=> Fastpath with G.INP <=> Interleaved
3) Fastpath <=> Fastpath with G.INP
4) *I think is unlikely* G.INP enabled all of the time

[Chrysalis]

It also wouldnt surprise me that they may roll it out but not force a new sync.

[jid]

Just using the web when the connection stalled and then this appeared on the stats?



Can't say I've ever seen a spike up before? Maybe related to PhyR roll out? Attainable sync went up by 10,000kbps as well.

Also had full packet loss showing during that time on the BQM. Although may be related to this:

BT are apparently doing this between midnight and 6, but I doubt that would have caused loss of sync:

BT is implementing a one-touch project to upgrade MSE, MSC, IEA, EES and EEA devices at (Kirkby Lonsdale, Leigh Collier Lancs, Oxted, Pocklington, Saffron Walden, Wigton, London Covent Garden, London Croydon South, Salisbury Sarem Trunk, Swansea Metro Node). This involves a software upgrade and some hardware changes on the device in a single night under (Program 45 - 7750 Software Upgrade).

I do have a theory, at this time, 00:23 connections on the cab disconnected, and as I reconnected, the amount of crosstalk reduced and then went back up as modems synced back up? I assume the effects of crosstalk are that sudden if all connections were to lose sync.

Obviously, this is only my own theory, however, it seems highly feasible? We also are experiencing an electrical storm at the moment, but that was after this spike.

[simoncraddock]

I had asimilar outage around 11pm last night which lasted 5 mins but it didn't drop the line.

[kitz]

Strange - My Billion VDSL2 sync showing no retrain or disconnected yet by BT roll out? I don't think it haven't rolled out yet!

Also consider the fact that iirc your line is very good and sees very little errors.   DLM will only use it if needed. 
To explain to you a bit better, Its kind of like saying BT has introduced interleaving but you wont see it in use unless its deemed necessary.

--
eta..  just noticed that ixel also explained it. 

[kitz]

@ jamie

That looks typical of when a crosstalk disturber performs a router reboot/resync.  I see it happen on my own line a fair bit.

[jid]

@ jamie

That looks typical of when a crosstalk disturber performs a router reboot/resync.  I see it happen on my own line a fair bit.

I'd never seen it before so thanks for pointing this out. Thought I'd witnessed some enabling of G.inp, makes me realise how much one person is affecting me!

[kitz]

This is one of mine that I see frequently.   I think their line must be reasonably unstable as it seems to drop several times a week, although not as often now so it may be more heavily DLM'd.   This particular one 'costs' me 5Mb.

[jid]

Interesting, looking back this one "cost" me about 11mb.

It was during an electrical storm so whatever line it was I'm guessing that is maybe what caused it.

[kitz]

Yes the situation you described is likely.    Ive seen it too on a few occasions during  would be considered wide event type noise.   I'll see burst of CRCs but because my line is in a better condition it will hold on to the connection, yet the other line gets taken out during the same event.   I'm pretty certain Ive shown screen caps of this before on the forum.

[marjohn56]

A question from the not so informed. Is it possible to have fastpath and interleave, see below:



Sorry image is larger than it needs to be.

[Ixel]

Either it's a bug in the statistics or you're on G.INP. I thought for G.INP that the depth on the first bearer remains 1 (fastpath) but a second bearer is used which is interleaved which is used for the physical retransmission (G.INP). Is that a BT VDSL2/FTTC connection?

What's your ping like to places such as bbc.co.uk?

[marjohn56]

BBC pings at 14ms, allow a couple off that as I get 2ms just pinging the router!

I forgot to add that a couple of days ago, when the DLM first came back to life it was showing Interleaved on both US & DS. Then it went to Interleave on DS only, now it's showing Fastpath on both, so I guess you may be correct and G.Inp is active.

It's Sky Unlimited Pro, so yes, BT

Your TQM graph is interesting