• 5.8.1. DX_EBLK Overview
• 5.8.2. DX_EBLK Definition
• 5.8.3. DX_EBLK Parameters

5.8. DX_EBLK: Call Status Event Block

The DX_EBLK data structure contains parameters for the Call Status Event Block.

5.8.1. DX_EBLK Overview

This structure is returned by dx_getevt( ) indicates which Call Status Transition event occurred.

NOTE:

dx_getevt( ) is a synchronous function which blocks until an event occurs. For information about asynchronously waiting for CST events, see dx_setevtmsk( ).

5.8.2. DX_EBLK Definition

The typedef for the structure is as follows:

    typedef struct DX_EBLK {

      unsigned short ev_event;      /* Event that occurred */

      unsigned short ev_data;       /* Event specific data */

      unsigned char ev_rfu[12];     /* Reserved for future use*/

      }DX_EBLK;




5.8.3. DX_EBLK Parameters

Parameter	Description
ev_event	contains the event type. Use the following defines to identify the event type:
	Event Type	Description
	DE_DIGITS	digit received
	DE_LCOFF	loop current off
	DE_LCON	loop current on
	DE_LCREV	loop current reversal
	DE_RINGS	rings received
	DE_SILOFF	non-silence detected
	DE_SILON	silence detected
	DE_TONEOFF	tone off event
	DE_TONEON	tone on event
	DE_WINK	received a wink
	DX_OFFHOOK	offhook event
	DX_ONHOOK	onhook event
	DX_ONHOOK and DX_OFFHOOK are returned if a TDX_SETHOOK termination event is received.
ev_data	contains data associated with the CST event. All durations of time are in 10 ms units. The data are described for each event type as follows:
	Event Type	Data
	DE_DIGITS	ASCII digit (low byte) and the digit type (high byte).
	DE_LCOFF	length of time that loop current was on before the loop-current-off event was detected
	DE_LCON	length of time that loop current was off before the loop-current-on event was detected
	DE_LCREV	length of time that loop current was reversed before the loop-current-reversal event was detected
	DE_RINGS	0 (no data)
	DE_SILOFF	length of time that silence occurred before non-silence (noise or meaningful sound) was detected
	DE_SILON	length of time that non-silence occurred before silence was detected
	DE_TONEOFF	user-specified tone ID for the tone-off event
	DE_TONEON	user-specified tone ID for the tone-on event
	DE_WINK	(no data)
	DX_OFFHOOK	(no data)
	DX_ONHOOK	(no data)

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