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FXO port disconect problem


I met  problem when FXO port on cisco router can`t get disconnect messages ,because of it cisco ip phone remains ringing.
When dialing from ip phone ,it begins to call after 15-20 seconds.

I have the following topology:

PSTN gives  phone connection through  SIP to Grandstream and from grandstream by FXO to Router.
I tried to make cusctom cptone,but it didn`t help me.

There is my voice port configuration :
 

voice-port 0/0/0
 ring number 2
 groundstart auto-tip delay 1
 echo-cancel coverage 64
 no vad
 timing hookflash-out 50
 timing guard-out 3000
 caller-id enable


voice-port 0/0/1
 ring number 2
 no battery-reversal
 groundstart auto-tip delay 1
 signal groundStart
 timing hookflash-out 50
 timing guard-out 3000
 caller-id enable

Also i try to discover from Telco which cptone ,frequency,cadence, grandsteam h 502 use ,and got answer that Telco engineers don`t know ,they staied it by default.In grandstream datasheets i also couldn`t find any usefull information

 

Everyone's tags (3)
1 REPLY
VIP Gold

Put below command under voice

Put below command under voice ports then check please.

timeouts call-disconnect 2

 

and you can visit below discussions for more info.

https://supportforums.cisco.com/discussion/12134091/fxo-ports-not-releasing-quickly

https://supportforums.cisco.com/discussion/11667991/fxo-not-immediately-disconnecting

Suresh

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