A Gigacenter is the black box that our techs installed in your home once you get Fiber. A Gigacenter is what all three services come out of. It is an ONT (Optical Network Terminal that also provides Wi-Fi. The Gigahub is also a black box but it has to have a Gigacenter in front of it or a cable modem. It is used by being bridged by ethernet from a Gigacenter or a cable modem. It is basically a wireless router/extender.