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Synchronous Modem Eliminator (SME-4M)
3.1 LED Displays
ON
TXD
OFF
TXA
ON
OFF
TXB
ON
OFF
ON
DSR
OFF
DSR A ON
OFF
DSR B ON
OFF
In DSR remote mode, the DSR LEDs also indicate the reception of DTR
10
Transmitted Data in space
Transmitted Data in mark
data flow from port B to port A
no data flow from port B to port A
data flow from port A to port B
no data flow from port A to port B
Data Set Ready signal ON
Data Set Ready signal OFF
indicates a DSR signal (pin 6) out from port A
indicates no DSR signal (pin 6) out from port A
indicates a DSR signal (pin 6) out from port B
indicates no DSR signal (pin 6) out from port B
(pin 20) from the opposite port.
NOTE
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