4.1. Channel/Time slot DEVice INFOrmation (CT_DEVINFO)

The CT_DEVINFO structure supplies information about a device. This structure is used by the SCbus routing functions identified by the suffix _getctinfo( ). On return from the function, the CT_DEVINFO structure contains the relevant information and is defined as follows:

typedef struct {

          unsigned long      ct_prodid;

          unsigned char      ct_devfamily;

          unsigned char      ct_devmode;

          unsigned char      ct_nettype;

          unsigned char      ct_busmode;

          unsigned char      ct_busencoding;

          unsigned char      ct_rfu[7];          /* reserved for future use */

} CT_DEVINFO;

Valid values for each of the members of the CT_DEVINFO structure are defined in voxlib.h.

• The ct_prodid field contains a valid Dialogic product identification number for the device [length: 4 (unsigned long)].
• The ct_devfamily specifies the device family [length: 1 (unsigned char)] and may contain either:

CT_DFD41E	analog or voice channel of a D/41ESC or VFX/40ESC board
CT_DFSPAN	analog channel of a D/160SC-LS board, a voice channel of a D/240SC, D/320SC, D/240SC-T1, D/300SC-E1 or D/160SC-LS board, or a digital channel of a D/240SC-T1 or D/300SC-E1 board
CT_DFMSI	a station on an MSI board

• The ct_devmode field specifies a device mode field [length: 1 (unsigned char)] that is valid only for the D/41ESC or VFX/40ESC board and may contain either:

CT_DMRESOURCE	analog channel not in use
CT_DMNETWORK	analog channel available to process calls from the telephone network

• The ct_nettype field specifies the type of network interface for the device [length: 1 (unsigned char)]. Valid values are:

CT_NTNONE	D/41ESC or VFX/40ESC board configured as a resource device: voice channels are available for call processing; analog channels are disabled.
CT_NTANALOG	analog and voice devices on board are handling call processing
CT_NTT1	D/240SC-T1 T-1 digital network interface
CT_NTE1	D/300SC-E1 E-1 digital network interface
CT_NTMSI	MSI/SC station interface

• The ct_busmode specifies the bus architecture used to communicate with other devices in the system [length: 1 (unsigned char)]. The two valid values are:

CT_BMPEB	PEB (PCM Expansion Bus) architecture
CT_BMSCBUS	SCbus architecture

• The ct_busencoding field describes the PCM encoding used on the bus [length: 1 (unsigned char)]. Valid values are:

CT_BEULAW	Mu-law encoding
CT_BEALAW	A-law encoding

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