Emergency Operation; Emergency Operation On Network Termination Unit; Emergency Operation On A Pbx - Swisscom Classic A21 ISDN User Manual

Maintenance

Emergency operation

One of your phones can still be operated in emergency mode during power failures
(emergency operation).
You have to switch ON the emergency operation on the base of the telephone that is
used for emergency operation.
Your telephone is delivered with the emergency operation deactivated (OFF).

Emergency operation on network termination unit

The emergency power is supplied directly by the
exchange and provides sufficient power for just
one telephone. Not all features are available in
emergency mode. However, you can still make and
receive calls.
To set a telephone for emergency operation,
switch ON the emergence operation on the base of
the telephone.
Note You may set only one telephone for emergency operation: If you set more
than one telephone for emergency operation, none of the telephones are
able to function!

Emergency operation on a PBX

If your phone is connected to a PBX, the system supplies the emergency power. The type
of PBX dictates which features are available during emergency operation and how many
phones are capable of emergency operation. Refer to your PBX documentation.
Note For PBX operation you still need to enable your phone for emergency
operation (emergency operation switched ON).
45
Emergency operation
switch
On Off