42 Voice API Programming Guide — June 2005
Application Development Guidelines
duration = the value entered x 10 msec
The syntax of the function is:
int duration;
duration = 15;
dx_setparm(dev,DXCH_WINKLEN,(void*)&duration)
If duration = 15, then DXCH_WINKLEN = 15 x 10 or 150 msec.
6.5.3 Receiving an Inbound Wink
The information in this section does not apply to DM3 boards.
Note: The inbound wink duration must be between the values set for DXCH_MINRWINK and
DXCH_MAXRWINK. The default value for DXCH_MINRWINK is 100 msec, and the default
value for DXCH_MAXRWINK is 200 msec. Use the dx_setparm() function to change the
minimum and maximum allowable inbound wink duration.
To receive an inbound wink on a channel:
1. Using the dx_setparm( ) function, set the off-hook delay interval (DXBD_OFFHDLY)
parameter to 1 so that the channel is ready to detect an incoming wink immediately upon going
off hook.
2. Using the dx_setevtmsk( ) function, enable the DM_WINK event.
Note: If DM_WINK is not specified in the mask parameter of the dx_setevtmsk( )
function, and DM_RINGS is specified, a wink will be interpreted as an incoming call.
A typical sequence of events for an inbound wink is:
1. The application calls the dx_sethook( ) function to initiate a call by going off hook.
2. When the incoming call is detected by the Central Office, the CO responds by sending a wink
to the board.
3. When the wink is received successfully, a DE_WINK event is sent to the application.