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Voice API for Windows Operating Systems Library Reference — November 2003 25
Function Summary by Category
dx_clrsvcond( )
clears speed or volume conditions
dx_getcursv( )
returns current speed and volume settings
dx_getsvmt( )
returns current speed or volume modification table
dx_setsvcond( )
sets conditions (such as digit) for speed or volume adjustment; also sets conditions for play
(pause and resume)
dx_setsvmt( )
changes default values of speed or volume modification table
1.16 Call Progress Analysis Functions
Call progress analysis functions are used to enable the call progress analysis feature and change the
default definition of call progress analysis tones. See the Voice API Programming Guide for more
information about call progress analysis.
Notes: 1. Two forms of call progress analysis exist: basic and PerfectCall (formerly called “enhanced call
analysis”). PerfectCall call progress analysis uses an improved method of signal identification
and can detect fax machines and answering machines. Basic call progress analysis provides
backward compatibility for older applications written before PerfectCall call progress analysis
became available.
2. Throughout this document, call progress analysis refers to PerfectCall call progress analysis
unless otherwise noted.
The call progress analysis functions are:
dx_chgdur( )
changes the default call progress analysis signal duration
dx_chgfreq( )
changes the default call progress analysis signal frequency
dx_chgrepcnt( )
changes the default call progress analysis signal repetition count
dx_initcallp( )
initializes call progress analysis on a channel
dx_createtone( )
creates a new tone definition for a specific call progress tone
dx_deletetone( )
deletes a specific call progress tone
dx_querytone( )
returns tone information for a specific call progress tone