Administration

Diagnostics

Any CSTA messages are handled by this service. CSTA messages are used within the phone by all services as a common call progression and control protocol.

Data Access service

Allows other services to access the data held within the phone database.

Desktop

Responsible for the shared parts of the phone display. Primarily these are the status bar at the top of the screen and the FPK labels.

Digit analysis service

Analyses and modifies digit streams which are sent to and received by the phone, e.g. ca- nonical conversion.

Directory service

Performs a look up for data in the phonebook, trying to match incoming and outgoing num- bers with entries in the phonebook.

DLS client management

Handles interactions with the DLS (Deployment Service).

Health service

Monitors other components of the phone for diagnostic purposes and provides a logging interface for the services in the phone.

Help

Handles the help function.

Instrumentation service

Used by the Husim phone tester to exchange data with the phone for remote control, test- ing and monitoring purposes.

Java

Any Java applications running on the phone will be run in the Java sandbox controlled by the Java service.

Journal service

Responsible for saving and retrieving call history information, which is used by the Call log application.

Media control service

Provides the control of media streams (voice, tones, ringing etc. ) within the phone.

Media processing service

This is a layer of software between the media control service, the tone generation, and voice engine services. It is also involved in the switching of audio devices such as the hand- set and loudspeaker.

Mobility service

Handles the mobility feature whereby users can log onto different phones and have them configured to their own profile.

OBEX service

Involved with Bluetooth accesses to the phone.

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Siemens 20 Data Access service, Desktop, Digit analysis service, Directory service, DLS client management, Health service