(often plural) systems used in transmitting messages over a distance electronically.
Telephone, Telephony - transmitting speech at a distance.
Multiplex - communicates two or more signals over a common channel.
Distance, Length - size of the gap between two places; "the distance from New York to Chicago".
Frequently, Oft, Often, Oftentimes, Ofttimes - many times at short intervals; "As often happens".
Over - (cricket) the division of play during which six balls are bowled at the batsman by one player from the other team from the same end of the pitch.
Plural, Plural Form - the form of a word that is used to denote more than one.
Transmission, Transmittal, Transmitting - the act of sending a message; causing a message to be transmitted.
Secondhand, Used - previously used or owned by another; "bought a secondhand (or used) car".