Siemens Hicom 150 H Operating Instructions Manual page 3

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You can activate the functions of your system by
entering codes such as:
DND (do not disturb) on.
DND (do not disturb) off.
All codes to activate or enable functions are always
introduced with the digits , and all codes to
deactivate, disable or delete functions always begin
with the digits .
The codes themselves may contain up to three digits.
An alphabetically ordered overview of all functions and
their corresponding codes can be found in the
Appendix (Quick-Reference Operating Instructions).
Basic and Enhanced Functions
6