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