In terms of the move to digital voice that is usually within the 24hours of the date conversion given to you but may take 48 hours in some cases. Number porting process can be one of the reasons why it's taking longer than 24 hours. Also your hub needs to be pushed a configuration file and configures on backend resources needs to be updated. (This is why a reboot can sometimes speed things up as it triggers that refresh of configuration of the hub )
Is your phone service via Digital Voice working?
The disconnection of the PSTN line is a secondary process. In summary, once moved to Digital Voice you need to connect your phone handset to either the phone port on the back of the supplied smart hub or via a digital voice adapter and this should allow you to make calls and receive calls once the service is ready.
From the customers perspective that is all they need to worry about, as for then decommissioning the PSTN service that's a more manual process but shouldn't need the customer to know or worry about.
I know this thread is marked solved, but it came up when I was searching for the same thing last week and I wanted to add my own experience in case it helps anyone else reading it later.
The bit about the old landline still working is what threw me. In my case the PSTN line stayed live for about four days after Digital Voice went active. I could still make and receive calls on the old handset, which made me think the switch hadn't happened yet. It had. The two just run side by side until Openreach does the exchange work, exactly as described above.
Also worth knowing: "Service Ready" in the hub manager doesn't always mean calls will connect straight away. Mine sat like that for most of a day before the first call actually went through. A reboot seemed to push it along, same as others have found.
So if you're reading this and your old phone still works while the new socket also has a dial tone, that's not a fault. It's just the overlap period.
