Siemens OpenStage 60T User Manual page 127

Step by Step
j
Wait for the dial tone and enter the code for example,
97 for Do not disturb on. If necessary, make further
*
entries; refer also to the user guide for dial pulse/DTMF
phones.
or
j
Dial the external number.
You can only perform one function/establish one
outgoing connection at a time.
The connection is cleared as soon as the function
is successfully activated.
In the case of an external call, the connection is
cleared as soon as one of the call partners hangs
up.
More functions/services
127