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Connected to a PBX Extension Line
If the gateway is connected to a PBX extension line, then the busy tone of both the PBX and the PSTN
must be detected.
Connecting to a PBX extension line and detecting the busy tone of the PBX
36008913
307
301
Connect one of the PBX extension lines to the Gateway FXO Port (For MODEL 2S2O,
connect the line to P3).
Detect Channel: Enter 3 (The trunk line is connected to P3, and uses P3 for outgoing
detection).
Phone Number: Set the number of FXO line –to detect Reorder Tone.
Dial Number: Enter the number of the end to be tested—307.
Save detect value to CPT group: Enter the group that after testing to replace with.
Finally, click the “Accept” button.