DLM had put me interleaved last night around 3am. Sync rate down to 72000k from 79999k as downstream INP of 3.00 with Billion 8800NL over 113 hours before DLM was hit.

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1 23 45 67 89 1011 1213

Per second      Per minute      Per hour        Per day  CRC     Up      0               0               0               0               Down    0               0               0               0         FEC     Up      0.01            0.46            27.8            668             Down    0               0               0               0        HEC     Up      0               0               0               0               Down    0               0               0               0         ES      Up      0.01            0.77            46.4            1113            Down    0.02            1.08            64.9            1559

DLM is pure stupidity. It's just looking how many errors before DLM do something on the line.

FTTC are suppose highest speed. Not [censored] happy about it.

Pete, yeah I know virgin media don't do DLM. But, they do have awful congestion thought.

Edited by adslmax (Sat 04-Oct-14 15:27:07)

In reply to a post by adslmax:

It's just looking how many errors before DLM do something on the line.

Yes. That is the point.

FTTC are suppose highest speed.

Who says? BT's obvious intent is that there is some quality component to the provision, not *just* speed.

This thinking is definitely helped along by their desire to provide broadcast-quality TV OTT of the basic internet provision. Streaming definitely suffers if the quality of the line is not assured, to some level.

If it would not be the end of the world then why do you have two lines?

Post deleted by noppix1

I was hit by DLM adding 8ms interleaving 14 days ago and it has just been removed. I'm now on a sync speed of 72,629kbps against 66,673 with interleaving.

I moved from BT to Plusnet in the interim; I don't believe that made any difference to DLM; I did't even get a modem resync at the changeover time. I'm not seeing significant speed advantage from the DLM change as I am on the Plusnet 40/20.

It does mean I can make some latency comparisons though: ping to bbc.co.uk:
Plusnet, non-interleaved: 10ms
Plusnet, interleaved: 19ms
BT non interleaved: 19ms
BT interleaved: 28ms

Pings are never 100% consistent, but it does seem that averaged out 8ms interleaving adds 9ms to pings. Not sure why.
The high BT pings were due to silly internal BT routing from Winchester to London via Sheffield; and to Sheffield via Sheffield then London before leaving the BT network to make the trip back north again.

yeah latency is better on plusnet than BT.

Also BT had a low amount of permanent jitter on my line as packets were round robined around routers at different latencies to each other.

Edited by deleted (Sun 05-Oct-14 14:16:26)

My FTTC seem to get worse under DLM reduced from 79999K to 72000K and now reduced to 67312K as the downstream SNR reduced from 12.2 to 7.4 and interleaving INP 6.00.

xdslcmd info --stats
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 3
Max: Upstream rate = 28538 Kbps, Downstream rate = 86212 Kbps
Path: 0, Upstream rate = 19999 Kbps, Downstream rate = 67312 Kbps

Link Power State: L0
Mode: VDSL2 Annex B
VDSL2 Profile: Profile 17a
TPS-TC: PTM Mode
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 7.4 13.1
Attn(dB): 0.0 0.0
Pwr(dBm): 12.4 -0.4