The FCC is looking at the potential for using the C-Band downlink spectrum for more extensive mobile and fixed wireless broadband services. Before moving further in investigating future uses, the FCC is looking to determine who is already using the spectrum. As parties who have receive-only C-Band dishes are currently not required to register (though registration does accord them some protection from microwave users in the band), the FCC currently has no information about the total universe of users. So the FCC has imposed a freeze on the filing of registrations for new users of the spectrum, but allowed existing users to register on or before July 18. For important information on this development [click to pdf]