(computing, intransitive) To echo received text characters back to the computer that sent them.
1991, Martin D. Seyer, RS-232 made easyThe device that is to echo the characters should be optioned for echoplexing. As indicated, echoplexing is often confused with the duplexes. If a character is typed, such as A, and on the terminal appears AA, the far end is echoplexing while the terminal is optioned for local displaying of the characters while they are typed.
