It's not a package - it's some special features done for the Community Voice Mail group. This is a group that provides voice mail services for folks that, for whatever reason, don't have access to their own phone lines or the like. The features are tailored to their needs, it's not something that's available to the general public as a feature set.
If you'd like to know more about what CVM does, check out their web page here: http://www.cvm.org/