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5.0 OPERATION
Once you have configured each Model 1080A properly and connected
the twisted pair and RS-232 cables (see section 4.0, “Installation” on
page 22), you are ready to operate the units. This section describes
reading the LED status monitors, powering-up and using the built-in V.52
and V.54 test modes.
5.1 LED STATUS MONITORS
The Model 1080A features six front panel status LEDs that indicate the
condition of the modem and communication link. Figure 11 shows the
front panel location of each LED. Following Figure 11 is a description of
each LED's function.
Figure 11. The Model 1080ARC front panel, showing LEDs and switches
The “TD” and “RD” Indicators
The “TD” and “RD” indicators blink red and green with data activity. Red
indicates a low RS-232 logic level, green indicates a high RS-232 logic
level.