[cisco-voip] FXO disconnect issue

[Oleg Skomorokhov]

Hello all.

I'm trying to correctly end the calls through FXO ports, but after the
called party hangs up, i hear only short disconnect tones and the port
remains in UP state forever.

Tried to create a custom disconnect tone - i've recorded those short tones
and put them into audacity, got the frequency and cadence values, but it
didn't help.

Any ideas? The port configuration is:

voice class dualtone-detect-params 1
 cadence-variation 8
!
voice class custom-cptone SI
 dualtone disconnect
  frequency 402
  cadence 500 490

voice-port 0/1/2
 supervisory disconnect dualtone mid-call
 supervisory custom-cptone SI
 supervisory dualtone-detect-params 1
 no battery-reversal
 disc_pi_off
 cptone RU
 timeouts call-disconnect 1
 timeouts wait-release 3
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