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FXO calls not getting disconnected

Unanswered Question
Aug 9th, 2010
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Hi,


I am facing an issue after integrating PBX with 1860 Router. When a call comes in from PBX extension to a phone connected to Router (For both IP Phones and also Analog Phones connected to FXO), the phone keeps ringing even after the Caller hangs up.


The voice class defined is given below,


voice class custom-cptone ABC
dualtone busy
  frequency 425
  cadence 375 375
dualtone ringback
  frequency 440
  cadence 400 200 400 2000
dualtone disconnect
  frequency 485 625
  cadence 250 250


and the Voice port configuration on FXO Port is given below,


voice-port 0/1/0
supervisory disconnect dualtone mid-call
supervisory custom-cptone ABC
no vad
cptone IN
timeouts call-disconnect 1
timeouts wait-release 1
caller-id enable


Waiting for some valuable solution.

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paolo bevilacqua Mon, 08/09/2010 - 04:41
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How do you know the tone frequencies are right for your telco ?


Definitive solution is ISDN only.

Trying tobeone Mon, 08/09/2010 - 04:51
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am not sure about the disconnect frequency. But still isdn option is not there, thats why asking for a solution.

paolo bevilacqua Mon, 08/09/2010 - 05:55
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You need to know the exact frequencies. Search forum on methods to do that.

Thomas Dillingham Wed, 08/11/2010 - 19:23
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Three Things:


1st this document, although labeled BASIC, can get very deep, very quickly.  However it will explain the idea behind troubleshooting this issue in detail if my second point does not resolve this issue for you:


http://www.cisco.com/en/US/tech/tk1077/technologies_tech_note09186a0080094045.shtml


2nd try to add or remove this command to your voice port:



supervisory disconnect signal

or

no supervisory disconnect signal


And last but not least:  here is a good page with some information on troubleshooting FXO disconnect issues.



http://www.cisco.com/en/US/tech/tk652/tk653/technologies_tech_note09186a00800ae2d1.shtml



Thomas Dillingham

Cisco TAC



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