Maxim Integrated 73M1866B/73M1966B Reference Driver - Manual (Page 55)

UG_1x66B_015 73M1866B/73M1966B Reference Driver User Guide
Rev. 2.7 55
6.4.3 M1966_ENTER_CID_MODE
Description
Manually enters Caller ID mode regardless of the state of the automatic CID service.
#define M1966_ENTER_CID_MODE _IOWR(0xA4, 0xF2, unsigned int)
Prototype
int ioctl (
int chan_fd,
int M1966_ENTER_CID_MODE,
unsigned long param );
Parameters
Data Type Name Description
int chan_fd Channel descriptor.
int M1966_ENTER_CID_MODE I/O control identifier for this operation.
unsigned long param N/A.
Return Values
Data Type Description
int 0 – Successful.
-1 – If FXO channel is not off-hook.