FXO calls not getting disconnected

Trying tobeone · ‎08-09-2010

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.

paolo bevilacqua · ‎08-09-2010

How do you know the tone frequencies are right for your telco ?

Definitive solution is ISDN only.

Trying tobeone · ‎08-09-2010

am not sure about the disconnect frequency. But still isdn option is not there, thats why asking for a solution.

paolo bevilacqua · ‎08-09-2010

You need to know the exact frequencies. Search forum on methods to do that.

Thomas Dillingham · ‎08-11-2010

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