Siemens HiPath 500 Operating Instructions Manual page 71

Programming sensor keys
Step by Step
Select the saved procedure by pressing the key.
Procedures with activatable/deactivatable func-
tions are activated with one press of the button
and deactivated with the next.
You can press the procedure key during a call to
automatically send the saved digits as DTMF si-
gnals page 61. For display messages when
saving procedures, see page 124.
71