According to Avon, the means by which all Federation communications were transmitted. The messages were converted to zeta-3 particles before scrambling. A sub-beam communicator was found on Cephlon and used to contact Liberator: this presumably used the same principle, and likewise the sub-space communicator taken by Coser to UP-Weapon. The A-line pulse codes featured in Killer may have been an alternative means of transmitting information, or new and improved communications technology.