Bosch Integral TM13 Operating Instructions Manual page 19

Familiarize yourself with your phone
Basic operating rules "
Canceling an operation
Press the Release key
... or ...
Lift the handset and replace it immediately.
You can cancel an operation at any time if
you change your mind or inadvertently acti-
vate the wrong function.
The phone returns to the status it had be-
fore the function was selected.
19