Cpt/Cadence Settings; Busy Tone Cadence Measurement; Cpt Parameters Table - NetComm SmartVoice Gateway Reference Manual

CPT/Cadence Settings

CPT/Cadence setting parameters serve as the basis of an FXO interface to determine whether or not a
PSTN-call receiving party has hung up the phone. If the following parameters differ from the parameters
of the actual assigned lines, it could cause the FXO to continue to engage a line.

Busy Tone Cadence Measurement

• Busy Tone Cadence Measurement and auto learning: Provides a 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 cuts off an un-finished call, select less sensitivity.

CPT parameters Table

The CPT has 3 sets of parameter tables. You can adjust it based on local PSTN or PBX.
Moreover, users can use CPT Auto Detect to detect CPT parameters. Instructions are shown in the
following section. The method to detect CPT is as follows:
50 SmartVoice Gateway(s) User Guide
YML832 Rev1