Sources of Log Information
Information useful to call logging (which is saved by TAPI) originates in the
following sources, and is placed in the LINECALLINFO
- In an application's call of the initialization function, lineInitializeEx, it provides information such as the application's name. An application
should ensure that the information it provides with the initialization command is
accurate so that its activities are reflected correctly in the call log.
- The LINECALLPARAMS data structure, used in the function lineMakeCall, stores information such as the name of the called party, the originating
address, and the destination address. This structure is passed to TAPI by any
application that originates a call.
- The service provider supplies many items that can be logged such as the
- The LINE_CALLSTATE messages that pertain to a given call are an important source of logging
information, indicating whether the call successfully connected or was abandoned
because of a busy signal, no answer, network congestion, or other causes.
The start time, end time, and duration of a call are not recorded by TAPI. A
logging application that wants to log this information must record the time by
checking the system clock when certain LINE_CALLSTATE messages (such as
CONNECTED, DISCONNECTED, and IDLE) are received, and then derive the related time log
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