I just received my box.my phone line is in hall how do I set up my box in living room
Do you mean the router??
When you ordered NOW broadband did they inform you that an engineer visit would be required?
If no engineer visit is required but you want your router setup in another room to where the swtich is then I believe you will need to call the support team and they will arrange for an OpenReach engineer to come and install a swtich in the room you desire.