Ericsson DT400 User Manual page 84

Audible Adjustments
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84
Trembler
The trembler is a vibration alarm and can be ordered as a factory
featured option to your Cordless.
If your Cordless is equipped with a trembler, you can set the
vibration alarm instead of the ringing signal to indicate incoming
calls and messages:
O
Press to enter the menu
Select "3 Alerting" and press
Select "4 Trembler" and press
Scroll to choose between "Yes" and "No" and press
C
Press to exit the menu
A call will now be indicated by both the trembler and the audio
signal. If you want only the trembler to indicate calls, you have to
mute the ringing signal first.
BusinessPhone – Cordless DT400/DT410/DT420/DT430