I live at the end of a long but stable bit of copper on what was previously called a Market 1 BT exchange. Until yesterday my default SNR appeared to be 6 and I had been synced at 3072 since 24th. June. In the early hours of yesterday morning it looks like my default SNR was suddenly reset to 9 and the sync speed dropped to 2528.
In previous times when this sort of thing happened it was possible to ring the Helpdesk and they could start a profile re-train from their console. I was told yesterday that under the Talk Talk regime, I would have to produce evidence from 3 or 4 BT Wholesale speed tests after which the agent would escalate the problem to their people who dealt with BT. BT would examine the test results and if they thought it appropriate start a re-train.
This seems a hugely complex procedure with the ever-present risk that BT will fall back to their standard "You are connected at over 2Mb so there is no problem" script and do nothing.
Have I been informed correctly and if not, does anyone know what magic words I need to utter to the Helpdesk to arrange a re-train?