To set the key & feedback tones
Press to enter the carousel
Scroll to Sounds and press 
to select
Scroll to Settings and press 
to select
Scroll to Key & feedback tones and press 
to select
Press to select On or scroll to Off and press 
to select
To set the notification beep
Press to enter the carousel
Scroll to Sounds and press 
to select
Scroll to Settings and press 
to select
Scroll to Notification beep and press 
to select
Press to select On or scroll to Off and press 
to select
To activate/deactivate the music on hold
The feature allows the caller to hear music when the call is put on hold when transferring a call from one handset to the other.
Press to enter the carousel
Scroll to Sounds and press 
to select
Scroll to Settings and press 
to select
Scroll to Music on hold and press 
to select
Press to select On or scroll to Off and press 
to select
Sounds | 53 |
http://www.philips.com/faqs/dect