When converted to DV , if the consumer had various wired extensions/ phones they want to keep ‘live’ , that’s possible but needs a wiring rearrangement so the sockets are in effect ran from the phone port on the router ( called voice re injection ) neither BT nor Openreach are responsible for those sockets currently and after the change to DV are not responsible for reconnecting them to the hub , it’s not a particularly difficult thing to do most DIYers should be able to do this , or employ a tradesperson to do it .
BT , in certain circumstances, provide one or more DV adapters that convert an ordinary wired phone into a DECT phone , that can connect to the routers built in DECT base station, so in most cases the extension wiring isn’t needed anyway, the extension phones simply connect in a different way rather than into an extension socket , into the DV adapter which connect via DECT .
