You would not have any issue doing an upgrade if needed. And H.323 gateways have not changed much from the 12.X version to 15. You will not gain anything except for small bug fixes. If you are doing h.323 to SIP then that would be one reason to mo...
If installed frsh it is suppose to allow you to start services and gives you the ability to have 2 phones. Try sending a license file to Cisco and see what they give you in return.
