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JustForVoice_2
Enthusiast

FXO Disconnect Problem

Hi All,

I am faced FXO disconnect problem, I add the following configuration:

voice class dualtone-detect-params 1

freq-max-deviation 20

cadence-variation 50

!

voice class custom-cptone Disconnect

dualtone disconnect

  frequency 425

  cadence 500 500

!

 

voice-port 0/0/0

supervisory custom-cptone Disconnect

supervisory dualtone-detect-params 1

supervisory disconnect dualtone mid-call
  no battery-reversal
  input gain -3
  output attenuation -3
  cptone BE
  timeouts initial 5
  timeouts interdigit 3
  timeouts call-disconnect 3
  timeouts ringing 5
  timeouts wait-release 1
  timing hookflash-out 500
  timing guard-out 300
  timing sup-disconnect 50
  connection plar opx 60600
  impedance complex2
   caller-id enable
  caller-id alerting line-reversal
  caller-id alerting dsp-pre-allocate

I solved the problem but another problem appears, the call is dropping after some time.

I checked debug voip ccapi inout

the disconnect Cause Value=86

Any help please??

Regards,

4 REPLIES 4
JustForVoice_2
Enthusiast

is there any other parameters I can use to fix this problem?

I noteced the following:

the router will not detecet the disconnect unless I added

supervisory dualtone-detect-params 1 under the voice port

the value of freq-.max-deviation should be above 20 if it is less than 20 the router will not detect the disconnect

any suggestions??

Regards,

I am also having this exact problem and have read and tried :

FXO_Paper(config-voiceport)#supervisory disconnect dualtone mid-call
FXO_Paper(config-voiceport)#cptone us
FXO_Paper(config-voiceport)#timeouts wait-release 5
FXO_Paper(config-voiceport)#timeouts call-disconnect 5
FXO_Paper(config-voiceport)#exit

I have collected these 2 debugs:

debug vpm signal

debug voip vtsp all

Wouldn't I see a "disconnect signal" about 6 or so rings with no answer, or am I not looking at the correct debug? Is there a debug that can help me verify the "disconnect signal" I am suppose to be looking for?

The call just keeps ringing and doesn't get transferred back to LEC v/m.. If I shut FXO ports the LEC v/m picks up.

Help would be greatly appreciated.

This is due most of the time because of the "supervisory disconnect dualtone mid-call" command. The router might detect a tone that thinks is a disconnect so it drops the call. You could try changing the dual-tone-detect-param from:

voice class dualtone-detect-params 1


freq-max-deviation 20


cadence-variation 50

*****To****

voice class dualtone-detect-params 1

freq-max-deviation 25


cadence-variation 10 (Unit is 10ms)

**** If the probem persist then you would need to capture pcm traces for the disconnect to find the right pattern of the:

frequency


power


cadence

And then tune it accordingly.

Here is how to do the pcm captures:

http://www.cisco.com/en/US/docs/ios-xml/ios/voice/voiceport/configuration/15-2mt/voi-pcm.pdf

Hope this helps.

Luis A.

Jeremy Hutterer
Beginner

the fix for me was using the following:

voice-port 0/0/0

trunk-group ANALOG 4

connection plar opx 1111

caller-id enable

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