We have Cisco CUCM and CUC setup for voicemail and I have configured all the settings for the phones to be able to get a voicemail when a call is not answered. Callers are able to leave a message and MWI is working. But when the end user is pressing ...

Hello, I am trying to call from one extension to another extension in the same calling search space and the system gives a message saying "the call cannot be completed as dialed". I have checked the phone configurations and they are in the same parti...

Hello, We have some Cisco 7811 (SIP) phones trying to register to Cisco CUCM server sitting behind a Cisco 4451 router. 4451 router does the NAT for the CUCM. Phones use CUCM public IP address for registration. When SIP ALG is enabled on the router i...

I have a customer VRF and an Internet VRF on my router. I need to route some traffic from customer VRF to internet and in order to do this I will have to nat the customer vrf traffic going to internet to "Internet" vrf and do a NAT overload. Is this ...