"The satellites will employ optical inter-satellite links and phased array beam-forming and digital processing technologies in the Ku and Ka bands, according to documents filed with the U.S. Federal Communications Commission (FCC).[125][126] While specifics of the phased array technologies have been disclosed as part of the frequency application, SpaceX enforced confidentiality regarding details of the optical inter-satellite links.[127] Early satellites are launched without laser links, in October 2019 SpaceX expected satellites with these links to be ready by the end of 2020.[128] The inter-satellite laser links were successfully tested in late 2020.[129][130]"