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Busy Tone Cadence Measurement: Provide a best solution of FXO integrated with
PSTN or PBX. FXO will learn the busy tone automatically.
BTC Detection Sensitivity: The more sensitivity, the more quickly the system will cut off
the call. If the system often cut off an un-finished call, select less sensitivity.
The CPT has 2 sets of parameter tables. Please adjust the CPT based on local PSTN or PBX.
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