Telephony Server Plug-ins

Telephony server plug-ins translate modem messages into Symbian platform types. Symbian platform provides interfaces which must be implemented in the TSY for effective communication between the modem and Symbian platform. This section describes the telephony server plug-ins (TSYs).

Telephony applications use the client side API to access the functionality of the telephony server. The server translates the client request into the format used by the TSY modules. The TSY modules translate the client requests into hardware commands. The telephony server dynamically loads and unloads TSY modules at the request of clients. A basic TSY may support core telephony functionality, for example for making and terminating calls, on a wide range of hardware. A more advanced TSY may only support phone hardware from a specific manufacturer, or even just a single phone, for example a TSY supporting GSM functionality.

To access extended functionality supported by specific telephony hardware, the following is required:

• a standard extension of the client side API to make this functionality available to clients

• support for the functionality in a TSY module

When two manufacturers implement the same functions in different ways, different TSY modules are required. Both TSY modules respond to the same TSY API, but use different commands to control the telephony hardware.

• Concepts
  This topic gives the conceptual information for telephony server plug-ins.
• Configuration
  This topic describes the configuration for the telephony server plug-ins to add and remove certain functionality at the ROM build time.
• Licensee TSY Tutorial
  This topic describes how to implement a licensee TSY.
• LTSY for Dispatcher Tutorial
  This topic describes how to implement a Licensee TSY for the Common TSY with the Dispatch layer.
• LTSY Interfaces for CTSY with Dispatcher
  This topic describes the interfaces and the call-back functions that must be implemented in the LTSY developed for the CTSY with the dispatch layer.
• Reference
  This topic provides a summary of related documentation for the TSY to which you can refer.