Hi
The 15 minute so waiting 30 minute before reconnecting doesn't matter surely for a few re-syncs in a row. I've never waited any time before connecting and reconnecting and have made several connections/disconnections with minutes and it's made no difference.
Surely the DLM logic is clever enough to know what interventions are required based on error rates only? If a plug is pulled so all VDSL signal is completely lost (or power turned off), surely it would know by a complete absence of signal that no matter what intervention it could apply in the way of interleaving, G.INP, banded profiles etc it isn't going to allow the VDSL signal to jump through the air and find it's way back into the RJ11 plug laying by the socket disconnected? They must have something in place to know the lead has been pulled or power turned off and for that to be ignored by the DLM?
Is this an urban type myth thing, the 15 minute window, or do we know it really exists? It sounds like something that would be a stupid thing if it was true.
Regards
Phil