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Cisco IP Communicator 2.0.2 with CCM 4.0.2a SR2 Connecting via Cisco VPN

I am having the weird issue with IP Communicator 2.0.2 and CCM 4.0.2a connecting via Cisco VPN. Please me let know if anyone has seen this issue and how to fix it.

Symptoms: When IPC calls a Cisco IP phone extension the call connects and work fine.

but when a Cisco IP phone calls an IPC extension, the IPC displays the extension of the Cisco IP phone but not the name, it said from Unknown Caller and the call never connect. When I click answer on the IPC, the Cisco IP phone displays the call is connected but IPC shown the call still ringing and never connect.

any help will be appreciated !

Thanks in advance !!!



Re: Cisco IP Communicator 2.0.2 with CCM 4.0.2a SR2 Connecting v

You will probably have to sniff between the subnets of the VPN IP address with IPC and the Cisoc IP Phone. The test I normally try first is to see if IPC works fine in the local subnet with the Cisco IP phone. If all tests work, then I move to the VPN.

Most likely, you have a firewall block certain UDP/TCP ports that need to communicate bidirectional between the VPN subnet and the IP Phone on the local LAN.

Here is another good place to look also:

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