(under subclass 135) Subject matter wherein the system is developed to communicate with prearranged plural time division multiplexed stations, thus enabling all preselected stations to receive identified information at the same time it is transmitted.
(1) Note. These systems transmit the data without any coding, but the data itself identifies the specific stations that are to receive the transmitted data.
SEE OR SEARCH CLASS
379, Telephonic Communications, appropriate subclasses for nonoptical subscriber checking.
380, Cryptography, appropriate subclasses for coding of the information signal to prevent unauthorized users from receiving the information.
