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[kitz]

1 - does this have the same new broadcom as the zyxel kitz highly rates?
2 - does it support bridge mode so I can use it like the hg612 as modem only?
3 - can it collect full stats via eric's or BE's tools?

on #2 I think it has briodge mdoem but ideally would like somene to confirm, quote from specs.

Bridged or routed Ethernet encapsulation

Just in case this gets missed.

1) Yes - but note Les-70's comments about the firmware and errors
2) Eric and Les have this router on their FTTC lines so they will be able to confirm 2)
3) I believe so.

---
ETA another cross post - only with Eric this time

[JustAnother]

I'm using the Billion in bridge mode atm. Good read about DLM so far, I'm also interested in resetting it at some point (even got interleaving on the downstream, don't need that).

[adslmax]

Kitz I want to be 100% certain, not confusion. My mate want to know this by asking u a question below:

I'm a little confused with steps 1-3. Could you clarify a bit more about router/modem. I have a new BILLION VDSL Modem/Router (all in one), thus negating the need for a router. Now, step 1 says, leave the modem cable plugged into socket, then switch off router (my NETGEAR router) by the power button. Then remove the modem (did you mean OPENREACH modem?), then wait 1/2 hr later, and then connect the BILLION modem/router in? Is that the correct sequence? Please advise.

[kitz]

Yes if its a BTOpenreach modem that you are taking off.  Whichever unit which the modem cable is plugged into. That could be a BTOpenreach modem.. or a VDSL combined modem/router.     I'll clarify that post to also say BT OR modem/router.

[Chrysalis]

thanks guys for the replies.

[adslmax]

Kitz what does INP mean?

I can see some get INP 8.00, mine INP 3.00?

I just found it from zen tech guy posted below explaining of DLM:

DLM on FTTC is very similar to that of ADSL2+,

 

This includes impulse noise protection (INP), different levels of interleaving and banded profiles. What it does not have however, is the ability to change the target SNR to anything other than 6db.

 

The DLM system will drop sync and resync if needed.   

 

Interleaving and INP are error correcting tools and can improve/reduce the max attainable rate or current sync rate, even if there is no banded profile applied.
These tools kick in to help clear errors.
The slightly increased ping responses and lower sync speed differences are negligible on fibre and should be taken as simply a fact of life rather than a detrimental factor.
Without them you may find a banded profile instead, and that does make a difference.

It does take an engineer or a call to BT to change a profile.  You CANNOT opt out of Interleaving or INP on any line as you may have done on ADSL. That is purely DLM managed.

We would only send an engineer to confirm stability and reprofile if we know something has changed to clear an issue or full diagnostics completed. We can also only raise a performance related fault if the speed drops by 25% within 14 days.

 

DLM kicks in when the VDSL modem - either as part of a VDSL modem/router, or the Openreach supplied modem - loses 'Sync' to the DSLAM in the cabinet or has a large amount of data errors. This does not include auth or 'PPP' drops - i.e. rebooting separate router.


The DLM system is completely autonomous and banded profiles or interleaving/INP will be changed depending on the line stability and number of errors.The system CANNOT determine the difference between a reboot of the VDSL hardware, and a genuine drop due to a fault.

 

A good guide to the dropoff limit is approximately sync 10 drops a day for 3 days straight to initiate a profile change down. Going back up depends on seeing stability and reduced errors for a period of time, and there are no rules around this that I could explain. Basically 2-3 days of stability SHOULD (not Will) begin to make profile changes. If there is only a slight amount of banding this could take a lot longer to creep back up.

 

Sync can drop or errors can be caused:

 

Internally due to PSTN kit internally (phones,sky,alarm), Faulty wiring/faceplate (this includes the DSL filter fitted into fibre faceplates) and Faulty modem.

Externally could be the copper wire, or the DSLAM in the cab.

 

Any of these going faulty can cause Sync drops and therefore DLM could kick in. That is the reason for the basic internal diags needed for any intermittent or speed fault before we would even consider sending an engineer to check and reprofile the line.

 


DLM can apply any of the following:

 

 Banded profiles - e.g. up to 80, up to 20, up to 5, up to 2. (many others but my typing fingers getting tired now)

 Profiles with enhanced Impulse Noise Protection up to INP level 8

 2 interleaving profiles

 Independent DLM for upstream and downstream.

 

Hope this helps you understand the system. 

[kitz]

Yeah my INP was also set at 3 when I got interleaved.

[adslmax]

Plusnet just told me the reason of DLM taken place on my line because of too many PPP connection drops but I thought DLM not interesting if Plusnet PPP connection to different gateway change?

The DLM only interesting is the openreach modem (VDSL2 modem) stay active to the cabinet not the router ppp connection?

My connection just drop out last night after 12am because of plusnet profile change in my line from 77.4Mb to 70.6Mb.

My throughput speed drop from 74/18 to 67/17 and ping went up from 10ms to 25ms




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[AArdvark]

Can I ask where the Connection logs are on the Plusnet site.

I have searched but cannot find it.

[kitz]

Good grief.  How many times have you contacted Plusnet about the DLM change.  They cant do anything about it

PPP sessions shouldnt be noticed by the DLM.   
There looks to be a total of 11 new sessions on that Wednesday...  5 of which with gaps that would indicate a resync, I cant say for the other 6 as they were too quick.   Where you gateway hopping by trying to resync?

[kitz]

Can I ask where the Connection logs are on the Plusnet site.

I have searched but cannot find it.

They arent... you have to pester one of the staff to get one.

[adslmax]

kitz - plusnet had a gateway problem last week on bng gateway. Sometimes the ping is higher on some gateway, that's why i change to different gateway to get lower ping. Plusnet told me to stop doing this as any PPP drop will trigger DLM even worse on the line.

I did request plusnet for a connection log plus GEA FTTC Test result too.

I think DLM hit because of me doing this:

Testing BT Home Hub 5 (VDSL2 Modem)
Testing Netgear DGND3700v1 (VDSL2 Modem)
Testing TP-Link TD-W9980 (VDSL2 Modem)
Testing Billion 8800NL (VDSL2 Modem)
Back to normal BT Openreach Modem (VDSL2 Modem)

[AArdvark]

Can I ask where the Connection logs are on the Plusnet site.

I have searched but cannot find it.

They arent... you have to pester one of the staff to get one.

Thanks, that was not clear.
I thought I was missing something useful.
(I will NOT be pestering Plusnet to get one  )

[adslmax]

(I will NOT be pestering Plusnet to get one  )

You can ask plusnet staff for one copy sent to u of connection log plus GEA FTTC Test Result (it free of charge)

[kitz]

The only time Ive ever got them was when I had a proper line fault... so the last time one was done on my line would have been over a year ago.
When I got hit by the DLM when testing the TP-link,  I just thought 'grrrrr tough luck'. Theres nothing either I nor Plusnet can do about it so I just waited for it to go back to normal.