User's Manual Part 1
Firmware Version 1.0.0.1  UCM6200 Series IP PBX User Manual  Page 149 of 320
PSTN Detection 
Click on "Detect" to detect the busy tone, Polarity Reversal and Current 
Disconnect by PSTN. Before the detecting, please make sure there are 
more than one channel configured and working properly. If the detection 
has busy tone, the "Tone Country" option will be set as "Custom". 
PSTNDETECTION
The UCM6200 provides PSTN detection function to help users detect the busy tone, Polarity Reversal and 
Current Disconnect by making a call from the PSTN line to another destination. The detecting call will be 
answered and up for about 1 minute. Once done, the detecting result will show and can be used for the 
UCM6200 settings. 
1.  Go to UCM6200 web GUI->PBX->Basic/Call Routes->Analog Trunks page. 
2.  Click to edit the analog trunk created for the FXO port.   
3.  In the dialog window to edit the analog trunk, go to "Tone Settings" section and there are two methods 
to set the busy tone. 
  Tone Country. The default setting is "United States of America (USA)". 
 PSTN Detection. 
Figure 93: UCM6200 FXO Tone Settings 
4.  Click on "Detect" to start PSTN detection. 










