[Chrysalis]

Its been recently discovered that if you yank the power cable out of a HG or ECI modem it sends a dying gasp to the DSLAM. The loss of power also means when power is restored the modem has no UAS or LOS to report to the dslam, so then DLM should discard the downtime and not react to it. Openreach documention does say they have methods to see when is a loss of power. Dying gasp may be the method.

So if you ever move your modem or doing something to cause downtime, its best to disconnect it by cutting the power to it first. Removing the DSL cable or initiating a resync in the interface will make DLM think its line instability.

From my experience a disconnection per day doesnt make DLM act. It tolerates one disconnection, I think it tolerates 2 even as long as they short. It should tolerate unlimited if its related to power in theory.

However if you are on a stability profile banded/interleaving and waiting for recovery, then its very important you dont disconnect at all. In that case DLM wants to see platinum stability.