Modem with improved handshaking capability

摘要: The preferred embodiment (11) of the modem comprises a control unit (13), memory (27), switch (14), and engine (17). (17) establishes communications with (30) using conventional handshake methods. (13) then initiates special sequence composed nonprintable, opposing characters to via (14) If completes exchange desired information. does not complete functions as modem. use nonprinting, for prevents from adversely affecting external devices (10) (34).