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6 IN DI CA TORS
The LED indicators on the front case are used to indicate modem status:
RUN
BUSY
RTS
CTS
CD
RXD
TXD
The LEDs may be dis abled to con serve power by set ting SW1.1 off.
B1474
Power is on the modem.
The modem is waiting to transmit but is held back by the squelch detector.
Request To Send from the computer is present or characters have been
re ceived into the buffer.
Clear To Send is active.
Carrier is detected on the incoming channel.
On when a mark is received and off when a space is received.
On when a mark is transmitted.
BARNETT EN GI NEERING LTD.
PAGE 16
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