I have a Cisco UC540 setup with a couple SIP trunks. The phones on the LAN work fine. I can make and receive calls without a problem. I am trying to get the Cisco IP Communicator to work. Right now I am just testing the software on the internal LAN. When I start it up it just sits there saying that it is registering and it never fully registers. I set the TFTP server address to the LAN IP address of the UC540 in the IP Communicator.
I am not sure if it matters but I am not using this device as the gateway for the network. I have a Cisco Pix firewall that is the gateway device for the network. I have 14 static IP addresses so both the WAN interface of the UC540 and the Public interface of my Pix are connected directly to the internet. I didn't want the UC540 routing through the Pix since I thought that might cause a performance problem. I set the TFTP address in the IP Communicator to the IP address of the LAN interface on the UC540.
Any help would be appreciated.