mac99 This port is used by UPC for remote maintenance, as well as modem queries, which are then incorporated into services such as MyUPC. You can leave the port open.
Informations TR-069: TCP port 7547
This port is usually used for the call waiting function of the remote maintenance protocol TR-069. The provider can use it to cause a router to send diagnostic information to its maintenance server or to ask for an update. However, some routers also allow additional functions for administration on this port.