[Freeswitch-users] G.729 transcoder licensing

If we want to just have a play with G.729, can we buy just a couple of channels and then add to them later? And how does it cope with some channels? Presumably it stops offering G.729 when they're all in use? The other question is how does the G.729 licence bind itself to a system? Is this a hardware ID thing, or a Freeswitch ID? Does it work on VMs?