I have IP Communicator running against a UC500 box in my office fine.
I have a client with a similar config. They are using a Netscrren firewall with VPN.
I can ping and access the GUI for the UC500. I have added the CIPC into the config so the phone is listed but I cannot get it to register to the call manager.
Under device I keep getting either unavail or standby
Any help or ideas.