Black Box MX880A, Руководство пользователя

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12
ASYNC/SYNC FIBER OPTIC MULTIPLEXOR
The installation procedures covered in the previous section must be
completed and checked before the multiplexor can be operated properly.
5.1 Controls and Indicators
This section describes the front-panel controls and indicators (shown in
Figure 5-1, below).
5.0 Operation
Figure 5-1. Front-panel controls and indicators.
5.1.1 C
ONTROLS
• Local Loopback (LLB) Button: Press to perform local loopback test.
• Remote Loopback (RLB) Button: Press to perform remote loopback test.
NOTE: If both buttons are pressed simultaneously, the action will be
disregarded by the multiplexor and normal operation will continue.
5.1.2 I
NDICATORS
• Power: Green LED lights when power is ON.
• Test: Yellow LED lights when either the local or remote unit is
performing a test.
• Local Sync Loss: Red LED lights when synchronization is lost at the local
unit.
• Remote Sync Loss: Red LED lights when synchronization is lost at the
remote unit.