FTTC stats are rather complicated, not as straight forward as ADSL because of the 3 bands. Unless you've got a definite Line issue, it's probably not worth the effort of even considering the things needed to look at them and understand them. Most of the time if your BT IP Profile is solid, that's all that's really needed.
FYI if all you want to know is your Downstream sync speed then you can derive this from the Downstream BT IP Profile, profile x1.033 = Sync speed on FTTC
To ensure you get an accurate BT IP Profile, log in to the Modem/Router, in the Internet box, click Disconnect to drop the PPP Internet session (this is not the sync), wait 30 seconds then click Connect. This should ensure the relevant servers are updated with the current sync speeds.
DLM on FTTC, as you'd expect, is active all the time and there is no 10-day training period as such, but it can be especially aggressive in the first 2 days, it can be aggressive at other times as well, so as a general rule - do not turn off, reboot or disconnect the modem.
Should you ever have a real need to do that, the best method is to log into the Router, disconnect your PPP Internet session and then power down the Router. After about a minute power down the Modem and leave it off for at least an hour. Always best to do this in daytime.
When you power up again wait for sync and all lights on the Modem to stabilise before powering up the Router. When the Router has booted, login and and click Connect to establish a PPP session.
FTTC DLM has been reported to quite aggressively increase interleaving where it sees problems, but it will also reduce it over time if conditions improve. ISPs have no ability to turn Interleaving on or off on FTTC.
HTH.
I thought I was on to something for a minute.
