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Analog phones couldn't communicate with ip phones in an internal lan

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As you can see in the above picture, i have a astrick server 1.6.2 and cucm 7.0, spa and isr router.

when im calling from ip phone to analog phone call is successful , but when Im calling from analog phones to ip phones call is not successful.

only one way communication is happenig in this scenerio i.e from ip phones to analog phones.but vice versa is not working why ?

can any one slove my problem i will glad and thanks for reading my post.

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Cisco Employee

Analog phones couldn't communicate with ip phones in an internal

Kiran,

1. Who handles those analog phones ( CUCM or Astrick ) ?

2. Did you check the routing on the ISR ? Usually one way audio is experienced due to missing ip route. Please ensure you have the route in place for both directions.

3. What is the integration type between CUCM & Asterisk ?

GP.

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