Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 
New Member

FXO Supervisory disconnect problem

I am having issues with one of our client. We have some analog lines mapped with same number and terminated on voice gateway. When somebody calls from outside the Operator phone rings but it gets dropped as soon as it is answered and the strange thing is that the caller continously hears the ringback tone.Configuration is as below

voice-port 0/0/0

supervisory disconnect dualtone mid-call

supervisory custom-cptone UAE-CUSTOM-ALCATEL

supervisory dualtone-detect-params 1

no battery-reversal

input gain 14

timeouts call-disconnect 5

timeouts wait-release 5

connection plar opx 1001

caller-id enable


voice class dualtone-detect-params 1

freq-max-deviation 25

freq-max-power 0

freq-min-power 13

freq-power-twist 4

cadence-variation 4



voice class custom-cptone UAE-CUSTOM-ALCATEL

dualtone disconnect

frequency 425

cadence 375 375

CreatePlease to create content