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16 Voice API for Windows Operating Systems Library Reference — November 2003
Function Summary by Category
Before you can call any other library function on a device, that device must be opened using a
device management function. The dx_open( ) function returns a unique voice device handle. This
handle is the only way the device can be identified once it has been opened. The dx_close( )
function closes a device via its handle.
A set of device management functions exists for each Intel® Dialogic® library, such as fax (fx_
functions), modular station interface (ms_ functions), and conferencing (dcb_ functions). See the
appropriate API Library Reference for more information on these functions.
Device management functions do not cause a device to be busy. In addition, these functions will
work on a device whether the device is busy or idle.
For more information about opening and using voice devices, particularly on DM3 boards, see the
Voice API Programming Guide. Also see this guide for more information about naming
conventions for board and channel devices.
Use Standard Runtime Library device mapper functions to return information about the structure of
the system, such as a list of all physical boards, a list of all virtual boards on a physical board, and
a list of all subdevices on a virtual board. This device information is used as input to device
management functions. For more information on device mapper functions, see the Standard
Runtime Library API Library Reference.
The device management functions are:
dx_close( )
closes a board or channel device handle
dx_open( )
opens a board or channel device handle
1.2 Configuration Functions
Configuration functions allow you to alter, examine, and control the physical configuration of an
open device. In general, configuration functions operate on an idle device. Configuration functions
cause a device to be busy and return the device to an idle state when the configuration is complete.
See the Voice API Programming Guide for information about busy and idle states.
The configuration functions are:
dx_clrdigbuf( )
clears all digits in the firmware digit buffer
dx_GetDllVersion( )
returns the voice dynamic link library (DLL) version number
dx_getfeaturelist( )
returns information about the features supported on the device
dx_getparm( )
gets the current parameter settings for an open device