Supplementary Telephony Functions
A version of this page is also available for
4/8/2010
The supplementary telephony functions provide another level of line device handling. The application can use these services to perform conference-call, forward, park, and hold functions. These functions are available to the user only if the telephone company provides support for them.
An application can query a line or phone device for the set of supplementary services it provides using functions such as lineGetDevCaps or lineGetAddressCaps. A single supplementary service may consist of multiple function calls and messages. The Telephony API, and not the service provider developer, defines the behavior of the supplementary functionality. A service provider should provide a supplementary telephony service only if it can implement the exact meaning as defined by the API.
An application that is based on Windows Embedded CE can use a number of TAPI supplementary functions.
See Also
Reference
lineGetDevCaps
lineGetAddressCaps
Concepts
Establishing a Modem Connection
Conference Calls
Forwarding Calls