7
Initial operation
Emergency operation
The ISDN access provides power supply for your telephone. The AC adapter of the ISDN NTBA
(network termination basic access) must be connected to the 230 V power supply. In the case of
a power failure, the exchange office provides a remote power feeding for the emergency opera-
tion of one terminal as a maximum. If you want to use your tiptel 192/193 as emergency tele-
phone, you have to set the switch for emergency power feeding to position "ON". Please be
aware that the telephone functions are restricted during emergency operation. The following fun-
ctions will then not be available:
m LCD display in the idle state
m Telephone configuration features
m All answering machine functions (only tiptel 193)
m Hands-free operation / loudspeaker
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