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Voice API for Windows Operating Systems Library Reference — November 2003 501
call progress analysis parameters — DX_CAP
ca_nbrbeg
Number Before Beginning. Number of non-silence periods before analysis begins (Basic CPA
only)
Length: 1 Default: 1 Units: rings
ca_hi1ceil
High 1 Ceiling. Maximum 2nd high duration for a retrain (Basic CPA only)
Length: 2 Default: 78 Units: 10 msec
ca_lo1ceil
Low 1 Ceiling. Maximum 1st low duration for a retrain (Basic CPA only)
Length: 2 Default: 58 Units: 10 msec
ca_lowerfrq
Lower Frequency. Lower bound for 1st tone in an SIT (CPA)
Length: 2 Default: 900 Units: Hz
ca_upperfrq
Upper Frequency. Upper bound for 1st tone in an SIT (CPA)
Length: 2 Default: 1000 Units: Hz
ca_timefrq
Time Frequency. Minimum time for 1st tone in an SIT to remain in bounds. The minimum
amount of time required for the audio signal to remain within the frequency detection range
specified by upperfrq and lowerfrq for it to be considered valid. (CPA)
Length: 1 Default: 5 Units: 10 msec
ca_rejctfrq
Not used
ca_maxansr
Maximum Answer. The maximum allowable length of ansrsize. When ansrsize exceeds
maxansr, a “connect” is returned to the application. (CPA)
Length: 2 Default: 1000 Units: 10 msec
ca_ansrdgl
Answer Deglitcher. The maximum silence period allowed between words in a salutation. This
parameter should be enabled only when you are interested in measuring the length of the
salutation. (CPA)
• -1 – Disable this condition
Length: 2 Default: -1 Units: 10 msec
ca_mxtimefrq
Maximum Time Frequency. Maximum allowable time for 1st tone in an SIT to be present
Default: 0 Units: 10 msec
ca_lower2frq
Lower Bound for 2nd Frequency. Lower bound for 2nd tone in an SIT
Default: 0 Units: Hz
ca_upper2frq
Upper Bound for 2nd Frequency. Upper bound for 2nd tone in an SIT
Default: 0 Units: Hz