D5100 Issue
 

Hi,

I have a D5100 base unit / handset and 3 additional handsets. All have been working fine until I recently moved house.

When I connect the D5100 to a working phone line instead of getting a ringtone on any of the handsets I just hear background noise of the room the base unit is in i.e. if the TV is on I can hear that throught the handset.

I guess I may have inadvertently have it in some sort of 'intercom' mode or something but the instructions have been lost during the move.

Any ideas appreciated..........