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Voice API for Windows Operating Systems Library Reference — November 2003 81
return the duration of the first SIT sequence — ATDX_FRQDUR( )
ATDX_FRQDUR( )
return the duration of the first SIT sequence
!
!!
! Description
The ATDX_FRQDUR( ) function returns the duration of the first Special Information Tone (SIT)
sequence in 10 msec units after dx_dial( ) terminated due to an Operator Intercept.
Termination due to Operator Intercept is indicated by ATDX_CPTERM( ) returning CR_CEPT.
For information on SIT frequency detection, see the Voice API Programming Guide.
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! Cautions
None.
!
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! Errors
This function fails and returns AT_FAILURE if an invalid channel device handle is specified.
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! Example
This example illustrates ATDX_FRQDUR( ), ATDX_FRQDUR2( ), and ATDX_FRQDUR3( ).
/* Call progress analysis with user-specified parameters */
#include <stdio.h>
#include <srllib.h>
#include <dxxxlib.h>
main()
{
int cares, chdev;
DX_CAP capp;
.
.
Name: long ATDX_FRQDUR(chdev)
Inputs: int chdev
• valid channel device handle
Returns: first frequency duration in 10 msec units if success
AT_FAILURE if error
Includes: srllib.h
dxxxlib.h
Category: Extended Attribute
Mode: synchronous
Platform: Springware
Parameter Description
chdev specifies the valid channel device handle obtained when the channel was opened
using dx_open( )