Cpt / Cadence - D-Link DVG-6004S User Manual

DVG-6004S User's Manual

3-3-7 CPT / Cadence

CPT/Cadence 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.
Advanced Settings → CPT / Cadence

Busy Tone Cadence Measurement: Provide 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 gateway will cut off the call. If
the gateway often cut off an un-finished call, select less sensitivity.

BTC Volume Threshold: It is the threshold of busy tone detection. The gateway will learn BTC
succesfully if the volume threshold is in the range of busy tone cadence.
51
VoIP Gateway Configuration