Accessing Functions

... With Codes

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 by pressing the star key, and all codes to deactivate, disable or delete functions are always entered starting with the pound key. 

The codes 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). 

If your service technician has changed the default assignments and saved functions on keys in accordance with your requests or requirements, you can execute these functions by pressing the appropriate keys.

... With Function Keys

Functions for which a key has been set up  can be
accessed directly as follows. 

Press the "Consult" key. The function is executed,
provided this is possible in the current situation.