Maxim Integrated 73M1866B/73M1966B Reference Driver - Manual (Page 79)

UG_1x66B_015 73M1866B/73M1966B Reference Driver User Guide
Rev. 2.7 79
7.10.2 M1966_BTONE_FREQUENCY
Description
This is the list of tone frequencies that can be filtered out. The user must select the right frequency to
effectively filter out the billing tone.
Prototype
typedef enum
{
M1966_BTONE_FREQ_12KHZ = 0, /* 12KHz (F1) */
M1966_BTONE_FREQ_16KHZ = 1 /* 16KHz (F2) */
}
M1966_BTONE_FREQUENCY;
Parameters
Name Value Description
M1966_BTONE FREQ_12KHZ 0 12 kHz billing tone.
M1966_BTONE FREQ_16KHZ 1 16 kHz billing tone.
7.10.3 M1966_BTONE_FILTER_t
Description
This structure is used by the M1966_BTONE_FILTER IOCTL to enable or to disable the billing tone. The
filter is by default disable upon initialization and can be enabled to reject a tone of specific frequency
using this IOCTL.
Prototype
typedef struct m1966_btone_filter
{
M1966_BTONE_FILTER_COMMAND command; /* command */
M1966_BTONE_FREQUENCY frequency; /* billing tone frequency */
}
M1966_BTONE_FILTER_t;
Parameters
Data Type Name Description
unsigned char acz Active termination loop.
unsigned char dciv DC current voltage characteristic control.
unsigned char rgth Ring threshold.