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New Member

FXO disconnect and CPTONE

IOS router is successfull to understand disconnect signal

but it takes 5-7 seconds from disconnect of other side

I attach *.vav file of disconnect signal

here is my config;

voice class dualtone-detect-params 1

freq-max-deviation 20

cadence-variation 20


voice class custom-cptone TT

dualtone disconnect

frequency 450

cadence 220 200 220 200 220 200 620 200


voice-port 2/0/11

supervisory disconnect dualtone mid-call

supervisory custom-cptone TT

supervisory dualtone-detect-params 1

timeouts call-disconnect 3

timeouts wait-release 3

timing hookflash-out 500

connection plar opx 0

description 4283163

station-id name 4283163

caller-id enable

Cisco Employee

Re: FXO disconnect and CPTONE

This actually sounds OK - the duration of the disconnect tone is around 1.9 seconds per cycle, and since you have set the timeouts call-disconnect and wait-release on the voice port to 3 seconds, this equates to 5 seconds.

Changing these timers any lower than this often causes unreliable call disconnecting and given that the DSP needs at least one tone cycle to pick up the disconnect tones, so you might have to accept this 5 second disconnect delay.


Re: FXO disconnect and CPTONE

i also put in this command under the voice-port, maybe it may help

timing sup-disconnect (i put 100ms)