I have a small setup for testing phone with cisco 2800 loaded with CME8.6
Phones used are 7940 and 7912. It is possible to ring between both phones and voice is working as well. the issue is when I connect from a different location (From Home) with a phone pre-configured it rings but cant hear anything.
The Cisco 2800 is having an external IP and the ports in my home router are all forwarded.
Any help on this is highly appreciated.