ag_getctinfo( )

Description | Cautions | Example | Errors | See also

Name:	int ag_getctinfo(chdev, ct_devinfop)
Inputs:	int chdev	analog channel handle
	CT_DEVINFO *ct_devinfop	pointer to device information structure
Returns:	0 on success
	-1 on error
Includes:	dxxxlib.h
Mode:	Synchronous

Description

The ag_getctinfo( ) function returns information about the analog device. This function provides information about an analog channel such as on a D/41ESC or D/160SC-LS board.

Parameter	Description
chdev:	Specifies the valid analog channel handle obtained when the channel was opened using dx_open( ).
ct_devinfop:	Specifies a pointer to the data structure CT_DEVINFO.

On return from the function, the CT_DEVINFO structure contains the relevant information and is declared 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];

} CT_DEVINFO;

Valid values for each member of the CT_DEVINFO structure are defined in dxxxlib.h. Possible return values are:

• The ct_prodid field contains a valid Dialogic product identification number for the device.
• The ct_devfamily specifies the device family and may contain either:

CT_DFD41E	analog channel of a D/41ESC board
CT_DFSPAN	analog channel of a D/160SC-LS board

• The ct_devmode field specifies a device mode field that is valid only for the D/41ESC 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. The two valid values are:

CT_NTNONE	D/41ESC board configured as a resource device; voice channels available for call processing; analog channels are disabled.
CT_NTANALOG	analog and voice devices on board are handling call processing

• The ct_busmode specifies the bus architecture used to communicate with other devices in the system. 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. Valid values are:

CT_BEULAW	Mu-law encoding
CT_BEALAW	A-law encoding

Cautions

This function will fail if an invalid channel handle is specified.

Example

#include <srllib.h>  
#include <dxxxlib.h>  
#include <errno.h>  
main( )  
{  
   int  chdev;                                 /* Channel device handle */  
   CT_DEVINFO ct_devinfo;       /* Device information structure */  
   /* Open board 1 channel 1 devices */  
   if ((chdev = dx_open("dxxxB1C1", 0)) == -1) {  
         printf("Cannot open channel dxxxB1C1.  errno = %d", errno);  
               exit(1);  
   }  
   /* Get Device Information */  
   if (ag_getctinfo(chdev, &ct_devinfo) == -1) {  
         printf("Error message = %s", ATDV_ERRMSGP(chdev));  
               exit(1);  
   }  
   printf("%s Product Id = 0x%x, Family = %d, Mode = %d, Network = %d, Bus  
   mode = %d, Encoding = %d", ATDV_NAMEP(chdev), ct_devinfo.ct_prodid,  
   ct_devinfo.ct_devfamily, ct_devinfo.ct_devmode, ct_devinfo.ct_nettype,  
   ct_devinfo.ct_busmode, ct_devinfo.ct_busencoding);  
}

Errors

If the function returns -1, use the SRL Standard Attribute function ATDV_LASTERR( ) to obtain the error code or use ATDV_ERRMSGP( ) to obtain a descriptive error message. One of the following error codes may be returned:

Equate	Returned When
EDX_BADPARM	Parameter error
EDX_SH_BADEXTTS	Cbus time slot is not supported at current clock rate
EDX_SH_BADINDX	Invalid Switch Handler library index number
EDX_SH_BADTYPE	Invalid channel type (voice, analog, etc.)
EDX_SH_CMDBLOCK	Blocking command is in progress
EDX_SH_LIBBSY	Switch Handler library busy
EDX_SH_LIBNOTINIT	Switch Handler library uninitialized
EDX_SH_MISSING	Switch Handler is not present
EDX_SH_NOCLK	Switch Handler clock fallback failed
EDX_SYSTEM	Linux system error

See also

• dt_getctinfo( )
• dx_getctinfo( )

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