Operation; Power-On; Led Status Monitors - Black Box ME621A Manual

MODULAR FIBER CAMPUS DRIVER, MFCD PLUS

5. Operation

Once the Campus Driver is properly configured and installed, it should operate
transparently. This section describes power-up, reading the LED status monitors,
and using the built-in loopback tests.
5.1 Power-Up
To apply power to the Campus Driver, first be sure that you have read Section 4.3,
and that the unit is connected to the appropriate power source. Then power up
the unit using the rear power switch.

5.2 LED Status Monitors

The Campus Drivers feature eight front-panel LEDs that monitor power, the DTE
signals, network connection, and test modes. Figure 5-1 shows the front-panel
location of each LED. Following Figure 5-1 is a description of each LED's function.
Figure 5-1. ME620A front panel.
TD & RD: Glows red to indicate an idle condition of Binary "1" data on the
respective terminal interface signals. Green indicates Binary "0" data.
RTS: Glows green to indicate that the Request to Send signal from the DTE is
active.
CD: Glows red if no carrier signal is being received from the remote modem.
Green indicates that the remote modem's carrier is being received.
DTR: Glows green to indicate that the Data Terminal Ready signal from the
terminal is active.
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