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[xreyuk]

[Black Sheep]

Interesting that they're offering the 40/20 product. OR must be selling it to PN as the 80/20 and PN capping it to 40 on the DS ?? No reason why they shouldn't if it suits EU's needs. 

[xreyuk]

Yeah

Nevermind, they've said that they still put you on the 80/20 product and cap you using their profile. Your sync speeds would remain as if you were on 80/20, so I would still have interleaving.

Interestingly, I've seen somewhere on this forum that you can use a command to limit your download sync speed. Is it possible to do this to reduce the interleaving, and possibly remove it?

[Black Sheep]

Way out of my league, your last question, but I'd also be interested to know if this is the case ??

[NewtronStar]

Interestingly, I've seen somewhere on this forum that you can use a command to limit your download sync speed. Is it possible to do this to reduce the interleaving, and possibly remove it?

The only problem buy doing that is your going to have to lose 15000 kbps of your 46430 kbps which will take you down to 31000 kbps as you DS is low with a SNR of 5.1 dB.

The the lower you sync the SNR will increase and the interleaving depth will decrease, so if you could get the DS SNR to stay at 6.5dB 24/7 then there is a chance the DLM could move you onto fastpath. 

[xreyuk]

Thanks NewtronStar.

Why would I have to lose 15,000Kbps? Can you only limit it to certain thresholds?

I was originally synced around 43Mbps, but it moved it me up the other day. When at 43Mbps, I was around a 6dB SNR margin.

[NewtronStar]

Thanks NewtronStar.

Why would I have to lose 15,000Kbps? Can you only limit it to certain thresholds?

I was originally synced around 43Mbps, but it moved it me up the other day. When at 43Mbps, I was around a 6dB SNR margin.

The 15000kbps is an estminate, well that's it you see your SNRM is changeing all the time and 6db is not enough, have you been monitoring your DS SNRM with the stats software to see if it fluctuates or dips below 6dB ?

So to get any chance of seeing the DLM change you onto fastpath I would go for a DS SNRM of 7.5dB and don't know how much sync speed you will have to forfeit to get to that point it's trial and error 

[Bald_Eagle1]

SNRM can't be adjusted by FTTC users, but apparently sync speed can be.


I have attempted both ways a few times & had no success, but I believe Les-70 & maybe Kitz have had success with lowering sync speeds.

BTOR usually set a minimum SNRM value of 6 dB for VDSL2 connections (apart from Chrysalis who has somehow managed to get it down to a sustained 3.9dB or 4dB).



If sync speeds are reduced, SNR & SNRM should increase, possibly to a level where errors are drastically reduced & with a bit of luck, DLM would see it as a vey stable connection & possibly reduce interleaving depth, maybe all the way to reinstating fastpath.

[xreyuk]

I'd be interested in trying myself after I've given it a little while.

I was going to see if DLM was going to adjust my line any further so was going to give it a month or so.

If it doesn't do anything, I might try lowering sync speed to see if I can force DLM into putting game back to fast path.

[kitz]

Confirmed that both Les and I have been able to reduce sync speeds on the zyxel.  The info how to do so is in the zyxel thread and afaik should also work with a huawei too.

Les does so routinely now on a billion to keep the dlm happy and no interleaving.  Though iirc he did get caught fairly recently when swapping over routers.

[Ixel]

Confirmed that both Les and I have been able to reduce sync speeds on the zyxel.  The info how to do so is in the zyxel thread and afaik should also work with a huawei too.

Les does so routinely now on a billion to keep the dlm happy and no interleaving.  Though iirc he did get caught fairly recently when swapping over routers.

I also did this a while ago, I remember someone on here doubting my results and ability to cap the sync speed. You can do this with the HG612 and the Fr!tzbox 7390, I can't comment on the Zyxel as I've not used one, but whatever other's experiences are basically. It's an effective way to get rid of interleaving, just beware that doing so I found myself stuck on a 60/20 sync for several months, despite no longer enforcing a cap for several weeks at one point. My guess is DLM got stuck in a banded state somehow.

HG612

Code: [Select]

xdslcmd configure --maxDataRate <downstreamKbps> <upstreamKbps> <totalKbps>
For example, xdslcmd configure --maxDataRate 62000 20000 82000 would achieve a sync cap of 62,000Kbps downstream and 20,000Kbps upstream. This only works on the most recent firmware version for the HG612 however.

[NewtronStar]

I also did this a while ago, I remember someone on here doubting my results and ability to cap

I wonder was that me  ?

Its all fine and dandy to do this but if you have a sync of 30000 kbps it's not worth it as DS speed becomes more important than fastpath, it's only for the guys who already have 60+ megs sync at there disposal that's the way I see it.

[xreyuk]

Thanks guys, I think I'll give this a go if DLM doesn't do anything else with my line.

How much do you think I'd have to reduce the speeds by based on my stats in the first post?

Am I talking a drop of say, 4 or 5Mbps, or a larger drop of say, 15Mbps? I wouldn't mind taking a small hit to get off an interleaved line, however, I don't want to take a big one.

[NewtronStar]

well lets see when had a sync of 46430 kbps you had a DS SNRM of 5.1dB then you had a retrain and you had a sync of 43000 kbps this gave you a DS SNRM of 6.0dB so you lost 3000 kbps and gained 0.9dB of SNRM, so if the maths is correct to get 7.5dB (to cover any SNRM fluctuations on your line) then you should set the sync at 38000 kbps 

And then the long wait to see if the DLM moves you onto fastpath, I am sure you won't see it in 14days or 28days it could take a few months 

[xreyuk]