Service code settings
When you subscribe to extra services with your operator you may need to set some codes in your phone.The default codes are the codes used by the main national operator.
If you subscribed to another operator you may need to change the codes. Contact your network operator for more information on the services.
Press to enter the carousel menu
Scroll to Base station and press 
to select
Scroll to Service code settings and press 
to select
Browse through the list of services and press 
to select
Enter the code and press 
56 | Base station |
http://www.philips.com/faqs/dect