Hello Everyone,
I am a relative newbie here with an FTTC DLM / interleaving question.
Looking at the threads here I see I am not the only one puzzled by BTs DLM...
So apologies for yet another post on the subject and the length of the post.
I am connected to a Huawei cab and for the past 5 years my line has synced at >70 Mbps downstream and 20 Mbps upstream.
I am with PlusNet and was on the 40/20 package, which was then changed a few years ado to 55/10.
As a bit of background my line appeared to have a DLM reset a couple of years ago.
This resulted in a Synch rate of high 50's Mbps downstream and 20 Mbps upstream, with low level interleaving.
After a few days G.INP was reapplied on the downstream, which gained an increase in synch speed of approx 10 Mbps.
After a few more days DLM reduced the downstream noise margin in 1 dB steps, to 3dB, gaining approx 3 Mbps per dB.
My synch remained at >70 Mbps downstream and 20 Mbps upstream until mid April this year when PN moved me to a the 55/10 synch speeds.
At this point my line easily synced at 55/10 but downstream interleaving was applied and it stuck. No sign of fast path or G.INP.
I was then tempted by an offer from PN to switch 80/20 and hoped that my synch speeds would recover to the previous levels.
Approx three weeks my line was switched back to 80/20 and this resulted in a Synch rate of high 50's Mbps downstream and 20 Mbps upstream, with low level interleaving.
Again interleaving has stuck on despite low ES rates on the downstream.
I have attached most recent modem stats.
As the only 19 ES have been recorded in 6 days, I am baffled as to why DLM does not act to apply G.INP etc.
Any insights from the knowledgeable folk here would be appreciated.
Regards
Richard
