Symbol CRD3100-1000 Quick Reference page 11

What the lights mean...
Note: The indicator lights on the single-slot cradle have the same
meaning as those on the four-slot cradle.
Condition
ON Terminal is properly
placed in the cradle;
terminal is trickle
charging (if equipped
with NiCad batteries).
OFF Terminal is not properly
placed in cradle.
BLINKING Terminal is properly
placed in the cradle and
is fast charging (90
minutes).
CHARGING Lights COMM Lights
Terminal is able to
receive data only.
Terminal is not trying
to communicate.
Terminal is able to send
and receive data.
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