Once you have configured each Model 2020RC and connected the
cables, you are ready to operate the units. This section describes the
LED status monitors, clocking requirements and the power-up
procedure.
5.1 LED STATUS MONITORS
The Model 2020RC features thirteen front panel LEDs that indicate
the condition of the modem and communication link. Figure 6 (below)
shows the positions of the LEDs, and the bullets describe their
functions.
• Power - will glow green when power is applied to the Model
2020RC front card.
• TD (Transmit Data) - indicates status of transmit data from the
DTE. Red indicates a mark or idle state. Green indicates a space
or active state.
• RD (Receive Data) - indicates status of receive data from the
DCE. Red indicates a mark or idle state. Green indicates a space
or active state.
• RTS (Request to Send) - indicates status of Request to Send
from the DTE. Red indicates a mark or idle state. Green indicates
a space or active state.
• CTS (Clear to Send) - indicates status of Clear to Send from the
DCE. Red indicates a mark or idle state. Green indicates a space
or active state.
• CD (Carrier Detect) - indicates status of Carrier Detect from the
5.0 OPERATION
(continued)
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