20
SYNC/ASYNC FIBER OPTIC MODEM
3.3 What the Package Includes
• Fiber Optic Modem (protected by adequate cushioning)
• AC power cord
• This users’ manual
If anything is missing or damaged, contact Black Box at 724-746-5500.
3.4 What You Need to Supply
To operate the Fiber Optic Modem on a desktop or shelf, no additional equipment
is required.
3.5 Jumper and Switch Settings
3.5.1 S
TRAP
S
ELECTION
Before installing the Fiber Optic Modem, set the jumpers/switches according to
the intended configuration. The jumper/switch locations are shown on the board
layout diagram (see
Figure 3-1
and
Table 3-1
).
WARNING
Only authorized and qualified service personnel should access the
inside of the equipment.
To avoid accidental electric shock, always disconnect the interface
cables and the power cord before removing the unit from its casing.
Line voltages are present inside the Fiber Optic Modem when it is
connected to power and/or to the lines. Moreover, under external fault
conditions dangerous voltages may appear on the lines connected to
the unit.
Avoid any adjustment, maintenance, and repair of the opened
instrument under voltage as much as possible and, when inevitable,
only a skilled technician who is aware of the hazard involved should
open the unit. Capacitors inside the instrument may remain charged
even after the instrument has been disconnected from its power supply
source.
