We did a vendor evaluation on the periphonics system a few months ago.
It runs on most sparc machines. You have one sparc station for central
admin and development, and creation / modification of call flows with
periphonics software (all in solaris). Then you have this IVR box that
houses a stack of sparc broads + chunk cards in one housing.
Pretty neat machine, if you need IVR only. For heavy voice mail you
should have a second thought.