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FXO disconnect Issue

I have a problem regarding the termination of FXO ports.

We have a call manager with IP Phones connected and a Cisco 2821

gateway with FXO ports.Now the issue is that when somebody calls

from PSTN to the IP Phone and disconnects the call before the IP PHone

user pick up the phone ,the IP PHone keeps ringing and the FXO port remains

up though the PSTN user has already disconnected the call.

I have read many documents regarding this issue on Cisco Web site.We successfully

resolved the issue but another problem arised after that.

NOw here are the 3 steps we did.

1)INitially we did not apply any configuration to the FXO ports .So we

were having the same problem as described above.

2)We applied the following configuration on the FXO Ports,

voice class custom-cptone 1

dualtone busy

dualtone ringback

dualtone reorder

dualtone out-of-service

dualtone number-unobtainable

dualtone disconnect

frequency 425 425

cadence 200 200 200 200

voice-port 0/1/0

supervisory disconnect anytone

supervisory custom-cptone 1

input gain -6

output attenuation 6

echo-cancel coverage 24

cptone SA

caller-id enable

The problem resolved succesfully .The FXO port goes on hook when the

PSTN user disconnects the call.

3)After applying the above config,we used a tcl script to provide

basic auto-attendant feature on the router.We started having the same FXO issue

again.Now based upon the above information ,how do u think we should

resolve the problem.

1 REPLY
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Re: FXO disconnect Issue

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