Hidden Pages for QX Advanced Configuration
3.5 Fxocfg
The Fxo Configuration page allows configuring the FXO port settings to match the characteristics of
PSTN lines.
The below settings are found on the Fxo Configuration page (see Figure 8):
Figure 8: FXO Configuration page
Custom Fxo Disconnect Settings: Enables manual configuration of disconnect-call detection
settings. Central offices (COs) typically use any or a mixture of the following three methods to
notify call disconnection:
• Disconnect notification by sending busy/disconnect tones. The CO sends specific tones to
notify that the call party has hung up. To configure the QX to detect disconnect tones and
close the call upon detection, enable the Busy Detection checkbox and specify the following
settings:
o Frequency 1: Frequency of the disconnect tone used by CO. If the CO sends dual tone
signals, enter the high frequency of the tone into the Frequency 1 text field and the low
frequency into the Frequency 2 text field. In case of single tone signals, set the Frequency
2 to 0.
o Duration: Tone duration in ms.
o Duration Disp: Amount of time (ms) that the tone signal may vary from its assigned value. It
should be chosen reasonably large taking into account the value of Duration. By default
100 ms is recommended.
o Silence and Silence Disp: Silence duration and the amount (in ms) that it may vary
respectively.
o Pattern Count: Number of tone(s)-silence patterns the system should identify as a
disconnect notification. Leave the factory default value if the exact number is unavailable.
If the QX detects signals with above-specified settings, it will close the call.
• Disconnect notification by power interruption. The CO interrupts the power on the line to
notify that the call party has hung up. To configure the QX to detect power interruption, enable
the Disconnect Detection checkbox. Specify the Disconnect Duration setting, which is the
minimum duration (ms) of power interruption to be identified as disconnect notification. If the
QX does not detect the power for the time specified by the Disconnect Duration setting, it will
close the call.
Revision 1.0 11 20-Feb-15
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