Maxim Integrated 73M1822/73M1922 Control Module - Manual (Page 58)

73M1822/73M1922 Control Module User Guide UG_1x22_053
58 Rev. 1.0
6.9.3 M1X22_CPROG_MONITOR
Description
The Call Progress Monitor monitors activities on the line. The audio output contains both transmit and
receive data with a configurable level individually can be set using this IOCTL.
#define M1X22_CPROG_MONITOR _IOWR(0xA4,0xF0,unsigned int)
Prototype
int ioctl (
int chan_fd,
int M1X22_CPROG_MONITOR,
unsigned long param );
Parameters
Data Type Name Description
int chan_fd Channel descriptor.
int M1X22_CPROG_MONITOR I/O control identifier for this operation.
unsigned long param Pointer to the M1X22_CPROG_MONITOR_t
structure.
Return Values
Data Type Description
int -EFAULT – Failed to perform call progress monitor.
0 – Successful.