• 2.1.1. Auxiliary Functions
• 2.1.2. Conference Management Functions
• 2.1.3. Configuration Functions
• 2.1.4. Device Management Functions

2.1. Library Function Categories

The DCB/SC library functions provide the necessary building blocks to create digital conferencing applications. These functions can be divided into the following categories:

Auxiliary	adds flexibility while using active talker feature
Conference Management	controls conferencing
Configuration	sets or retrieves device parameters
Device Management	opens and closes devices

Each category and its functions are briefly described in the following sections.

2.1.1. Auxiliary Functions

dcb_evtstatus( ) _ gets or sets the status of a process-wide event

dcb_getatibits( ) _ reads active talker bits

dcb_gettalkers( ) _ gets active talkers in a conference

The dcb_getatibits( ) function provides flexibility while using the active talker feature. dcb_evtstatus( ) is used to retrieve or set events related to the process and not a specific device. dcb_gettalkers( ) retrieves active talker information.

2.1.2. Conference Management Functions

dcb_addtoconf( ) _ adds one conferee to an existing conference

dcb_delconf( ) _ deletes a conference

dcb_estconf( ) _ establishes a conference

dcb_getcde( ) _ retrieves the attributes of a conferee

dcb_getcnflist( ) _ gets list of conferees in a conference

dcb_monconf( ) _ adds a monitor to a conference

dcb_remfromconf( ) _ removes a conferee from a conference

dcb_setcde( ) _ sets the attributes of a conferee

dcb_unmonconf( ) _ removes the monitor from a conference

These functions are used to manage all conference activities.

2.1.3. Configuration Functions

dcb_dsprescount( ) _ retrieves the free resource count

dcb_getbrdparm( ) _ gets DCB/SC board device parameters

dcb_getdigitmsk( ) _ reads digit event message mask

dcb_setbrdparm( ) _ changes DCB/SC board device parameters

dcb_setdigitmsk( ) _ sets digit event message mask

These functions set the DCB/SC board or DSP device parameters, check the status of the DCB/SC board or DSP device parameter settings, and retrieve or set specific information about the DCB/SC DSPs or conferences.

2.1.4. Device Management Functions

dcb_open( ) _ opens a DCB/SC device

dcb_close( ) _ closes a DCB/SC device

These functions are used to open and close DCB/SC devices. Before using any other DCB/SC library function on a specific device, the device must first be opened. Each time a device is opened using dcb_open( ), the function returns a new unique device handle.

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