- Terms used as applied to Data
(and some Voice) Transmission over Copper Wire
X-ON/X-OFF (Transmitter On/Transmitter Off) --
Control characters that are embedded in the data stream that are used
for flow control, instructing a terminal to start transmission (X-ON)
and stop transmission (X-OFF). Also known as 'in band' flow control.
'Out of band' flow control is accomplished with signal levels in the
connector i.e. RTS and CTS can be on Pins in the RS232 connector for
'out of band' flow control).
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