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SIP Operation Manual V2.6
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.
CPT parameters Table
The CPT has 3 sets of parameter tables. Please adjust the CPT based on local PSTN or PBX.
Moreover, users can use CPT Auto Detect to detect CPT parameters. Instructions are shown in the
following section.
Using UDT detection: If the CPT auto detect function is not able to determine whether or not a
PSTN-call receiving party has hung up the phone, then the UDT detection function can serve as a
back up. To do this, enter the high/low frequency parameters from the CPT table into the UDP
table.
The method to detect CPT are as followed:
NOTE: To cope with different local PSTN and different PBX models, the system provides CPT
Auto Detect function to prevent the FXO from engaging a line. However, if the line of the receiving
party is engaged and his/her PSTN uses a voice prompt to replace the traditional beep sound, then
the system would not be able to detect a busy tone. Silence detection should then be used to
determine whether or not to end the call.
CPT Auto Detect
2 PSTN phone numbers or 2 PBX extension lines are needed.
Connect one of the phone sets to the FXO port (P3 or P4 of MODEL 2S2O).
The line of “Dial Number” must be hook on. Set the outgoing phone number the same as the phone
line that is in use as above, and click the “Accept” button to start detection.
If detection is successful, the parameters obtained will automatically be inserted into the CPT
parameter.
Save settings and restart the system.
Detailed description is given below:
Click “CPT auto detect” at the bottom of Trunk CPT Settings.
If CPT auto detect is used, the function would halt every operation of the Gateway. Select
”I am sure of
it”
, and then click the “Accept” button. Wait for 15 seconds, and then you will enter CPT auto detect window.
