We're upgrading finally from 7 to CUCM 10 as 7 is end of life. What are key new features appreciated in 10 versus 7? I heard Attendant Console is back. Anything else noteworthy? Any caveats to look out for? I know that proxy phone is no longer supported and there's a bug in the phone firmware that prevents transition to Expressway (the phones can spontaneously boot after 20 30 minutes of talking evidently). Anything else to be aware of as potential gotchas amidst the upgrade?