We are running a Cisco CM 4.0 phone system. We recently added another site office to outr network that is in another state. That remote office is using a Cisco 881 voice gateway router with two VPN tunnels for the network VLAN and the Voice VLAN. That all seems to work just fine. However, we would like the caller ID from that remote office to have a local presence. I've tried using the "External Phone Number Mask" field in call manager but it still just shows our main line at the corporate office for the caller ID. It's important that we can spoof the caller Id for to show a local presence for that site office as well as for any potential 911 calls. Any help on this would be greatly appreciated.