I have Ip office 500 V1 at multiple sights with all voicemail handled at Main sight. (centralized VM). The licence for the 500 V1 at the remote location has standard to professional licence, I take it for the advanced networking feature, and also has a network licence for 4 channels of H323 to tie locations together. Also has VCM card for hardware. I want to put in another location with an 500 V2, What licence do I need? Hardware? Thanks in advanced.