You will just need a new software feature license for version 7. The node and unity counts will carryover. Without the new license file, CCM service will not stay running.
When you use plar, the port goes off-hook on the 1st ring and then the call is placed. From a call state standpoint, the call is connected even if it's never answered.Using OPX, the voice port doesn't go off-hook unless the call is answerd. This can ...
Is your carrier Telefonica in Sao Paulo?I would suggest using just one ds0/CAS group: ds0-group 1 timeslots 1-15,17-31 type r2-...I would also suggest adding this to your voice-port:bearer-cap SpeechGood luck.