Final commissioning takes place in several steps. During the first step, just before switching, the current status of the connected routers is checked using an app. During the second step (after the four-hour interruption), the signal is still transmitted exclusively via the existing copper cable, but the mCAN is now connected in-between (looped in). Specifically, this means that the signal is routed via the copper line to the mCAN and from the mCAN via the existing copper cable to the router. During these tests, the mCAN is supplied with power from the local exchange via the existing copper cable and no longer via a generator. An app is used to see if all of the customers are back online.