Panasonic KX-TDA100 Installation Manual page 12

How to replace the fuse: Open the fuse compartment with a screwdriver and replace the fuse and fuse
cover.
The equipment must be connected to direct exchange lines and a payphone should not be connected as an
extension.
999 and 112 can be dialled on the apparatus after accessing the Exchange line for the purpose of making
outgoing calls to the BT emergency (999) and (112) service.
During dialling, this apparatus may tinkle the bells of other telephones using the same line. This is not a fault
and we advise you not to call the Fault Repair Service.
12 Installation Manual