Call sub-session

The call sub-session provides access to functionality associated with a specific call. The API provides functions that allow clients to:

• open a sub-session with a specific call that has already been created

• open a sub-session with a new call

• close an open call

• obtain information about the call capabilities

• obtain information about the current call status

• dial a number and establish a connection with a remote modem

• answer an incoming call

• connect to a call which has already been established

• request access to the raw data stream from a Data Call

• terminate an active call (hang up)

• transfer call ownership to another client

• retrieve information about the bearer associated with an active connection

• obtain notification that the hook status, or the progress state of the call, has changed

• determine the current progress state and duration of the call