i am having problem to setup vic2-2bri voice port on cisco 2801 router with ip phones using cisco call manager express . my internal ip phones are working fine but i want to make outgoing call through ISDN voice ports but not able to configure them. when i make outgoing calls ip phones dial the number"ring out" but after some time it comes with the message "unknown number". please if some one can help me to resolve this problem
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