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SYNC/ASYNC FIBER OPTIC MODEM
2.2 Physical Description
The Fiber Optic Modem is a compact unit, intended for installation on desktops or
shelves. The unit height is 1.7 inches (4.3 cm).
Figure 2-2. Fiber Optic Modem.
2.2.1 F
RONT
P
ANEL
All controls (pushbutton switches) and LED indicators are located on the front
panel. These indicators and controls are described in greater detail in
Chapter 4
.
2.2.2 R
EAR
P
ANEL
You can access all input/output connectors and power connections from the Fiber
Optic Modem’s rear panel. The AC power connector has an integrated fuse
holder. The correct rating of the replaceable fuse is printed on the rear panel of
the Modem. The Fiber Optic Modem’s rear panel is described in greater detail in
Chapter 3
.
2.3 Functional Description
2.3.1 G
ENERAL
This section describes the functional circuitry of the Fiber Optic Modem. The
Fiber Optic Modem uses an infrared light-emitting diode to convert electrical
signals into optical signals. The optical signal is converted back into an electrical
signal in compliance with the appropriate interface on the receive end.
