Physical Description - Black Box MT618A-ST-R2 User Manual

T3 FIBER OPTIC LINE DRIVER
Likewise, an alarm is relayed if a high bit-error rate is detected at the fiberoptic
interface.

2.2 Physical Description

Figure 2-2. The front panel.
The line driver's front panel features LEDs that display T3 electrical and fiberoptic
interface status. The front panel also includes a POWER LED and a TEST slide
switch for local- and remote-loopback activation. For details, refer to Chapter 4.
The rear panel has an AC power connector, a T3 electrical interface connector,
fiberoptic connectors, and an alarm relay connector. The rear panel is shown in
Figure 3-3 (in Chapter 3).
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