I am trying to connect a 7970 to a Call Manager running on a UC520 over the Internet using public IPs. I have opened the necessary ports on the WAN side of the UC520. I am now setting up the public IPs manually on the 7970. However it seems that the Call Manager IP cannot be manually set. The phone is picking up the internal IP for the Call Manager. I am not sure how this is happening since it is not getting DHCP from the UC520. Maybe the tftp? Anyhow, how can I manually setup the Call manager IP on the phone?