I have a Bunch of Cisco Ip Phone 7940 models that are setup to use call manager. I have setup an FTP server and downloaded the latest SIP Images. I can see the log file on the tftp server that verifies the phone has connected, and even downloaded the files. However it doees not upgrade. I have done factory reset and nothing. It just sits at configuring IP and does nothing. Can anyone help me figure out why these phones will not upgrade. I am trying to upgrade them to SIP.