Training Period Part duex

What actually happens after the training period has finished, mine was supposed to finish today (19th) but I am still getting resynchs and cutoffs and my speed at this moment is 160kbps although my router is synching at 2144kbps. Once done is it a case of the echange choosing the most stable speed and settings, my noise margin is wavering all over the place, from negative numbers to as high as 12db. So far not impressed with adsl max. As for my bras profile at the moment it reads 152k is there any way that I can raise this so that it can match the router synch at least?

Edited by Caesar (Mon 19-Mar-07 23:24:27)

In reply to:

---

What actually happens after the training period has finished

---

Absolutely nothing - training carries on forever to cater for changing conditions on the line, as indeed you've discovered. The '10 day period' is a bit of a myth. 10 days is simply the time after which training on a new line is likely to have stopped varying the configuration for the majority of lines. Most take a lot less than this, and some lines never vary from the day they're first switched on. A few take much longer to settle down. All depends on the line.

In reply to:

---

10 days is simply the time after which training on a new line is likely to have stopped varying the configuration for the majority of lines.

---

Though there is some truth in this, it is not the point of the 10-day period which is simply to establish what BT consider the normal level of operation of your line, above which it will not be considered faulty.

Newnet provide a[urel=http://www.newnet.co.uk/broadband/adslmaxfaq.php]good FAQ[/url]on the subject. The "training period" lasts at least ten days during which data is collected to establish the Maximum stable rate(MSR) which is the lowest sync rate in the period. Your Fault Threshold Rate (FTR) is 30% lower than that and is the lowest rate which BT will consider acceptable. That is all that is done in the "training" period.

The system will determine the current rates within seconds of connection and they will vary according to conditions. In order to ensure greater stability (but at the cost of faster connection after a problem) the sync rate will lower immediately in bad times and only rise to a higher rate if that higher rate has been effective for three days.

The choice of stability over speed does not suit all. My preference is to use a car that is only capable of driving at 50mph but does so continuously, rather than one that travels at 60mph but stops every five minutes. (In cases where you have to start the journey from the beginning each time the car stops, the better choice should be obvious).

Another example is driving along a road with a series of synchronised traffic lights. Driving at a constant 30mph it is possible to drive through all the lights without slowing down or stopping. Attempting to drive at, say, 50mph means speeding up after each light and then braking hard to stop, starting again and finishing up, if you are lucky, arriving at the same time as the 30mph driver.

The significant point is that variations in the line do not stop after ten days, nor do the things which cater for them.

In reply to:

---

hough there is some truth in this, it is not the point of the 10-day period which is simply to establish what BT consider the normal level of operation of your line, above which it will not be considered faulty.

---

I'm afraid it's precisely the point of the 10 day period. Why do you think BT choose 10 days for baselining the line? It's no more and no less than because 10 days is the time after which they've found in practice that the majority of lines have stablised. In any case, baselining the line has no effect on the line itself. It's purely setting a notional service level for future customer service reference.