Lights when data terminal provides a Request to
Transmit data signal to modem transmitter.
data from terminal.
Lights when power is on and modem is not in the TEST
Lights when received audio signal is detected.
When pressed, causes TEST indicator to blink,
terminates transmit and receive telephone lines in 600
input through AGC.
When pressed, causes TEST indicator to blink, blocks
transmit input data, and clamps transmit data input to
a Space condition that can be traced through the
error outputs when its DATA CLAMP switch is also
activated, allowing bit error rate to be approximately
determined without having to use a test pattern
Mother Board Controls and Indicators (1 of 2)