Sorry if I have missed something but I have read every post I can find on this forum and I seem to be stuck. I have several Cisco phones but I will limit this to just the 7941. I have upgraded to the lateset SIP version from Cisco and the phone seems to work fine. I have set up the TFTP server and created the SEP<MACAddress>.cnf.xml files, etc. and everything loads on the phone fine. The phone comes up, registers (shows regestering on the phone) then shows "Your current options" with lines labeled correctly. The thing that doesn't happen is that the phone doesn't show up on 3CX. I have tried bringing up a phone without configuring the extension and then another with the extension already added in 3CX. In both cases, the phone do not show up in 3CX and the extensions show as "Not Registered". What am I missing? Any help will be appreciated. Thanks.