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opens a device cc_Open( )
177
Each BRI structure is composed of one D channel and two B (bearer) channels. A
BRI board device, such as briS1, is defined as a station and controls the D-channel
the same way as a PRI board device. A BRI time slot device, such as briS1T1, is
defined as a bearer channel under a station and is handled the same way as a PRI
line device.
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Cautions
Do not open a D or B channel more than once from the same process, or
unpredictable results could occur.
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Example
#include <windows.h> /* For Windows applications only */
#include <stdio.h>
#include <errno.h>
#include “srllib.h”
#include “dtilib.h”
#include “cclib.h”
void main()
{
LINEDEV devhdl = 0;
CRN crn = 0;
char *devname = “briS1T1”;
if ( cc_Open( &devhdl, devname, 0) <0)
{
printf(“Error opening device: errno = %d\n”, errno);
exit(1);
}
printf(“Waiting for call\n”);
if ( cc_WaitCall(devhdl, &crn, NULL, -1, EV_SYNC)<0)
procdevfail(devhdl);
if ( cc_AnswerCall(crn, 0, EV_SYNC)<0)
callfail(crn);
.
.
.
.
.
/* Drop the call */
if ( cc_DropCall(crn, NORMAL_CLEARING, EV_SYNC)<0)
callfail(crn);
if ( cc_ReleaseCall(crn)<0)
callfail(crn);
if ( cc_Close( devhdl)<0)
printf(“Error closing device, errno = %d\n”, errno);
}