F I M - 1 0 8 F I B E R I N T E R F A C E
1 - 1
OPERATION
DESCRIPTION
With a Clear-Com FIM-108 System, you can connect Clear-Com intercom
stations or interfaces to the central matrix using fiber-optic cables at distances of
up to 12 miles (20 km). For added convenience, Clear-Com also provides BNC
connectors, so that you can connect FIM-108 units with coaxial cables at
distances of up to 1,000 feet (300 meters).
The system consists of one FIM-108 unit at the matrix-frame end and another
FIM-108 unit at the matrix-station end. Connecting the pair of interfaces with
fiber or coaxial cable, rather than with the standard 4-wire twisted copper, gives
you advantages such as increased security from electromagnetic and RF
interference, flexibility in equipment placement, ease of maintenance, and often,
reduced cost.
Clear-Com provides three versions of of the FIM-108 interface:
• An
FIM-108D
interface pair connects over two single-mode fiber-optic cables
—one cable for each direction of the signal flow. You also have the option of
connecting the units with two coaxial cables, again one cable for each direction
of the signal flow.
• An
FIM-108M
interface pair connects over one multimode fiber-optic cable.
The send and receive signals are combined using wave-dimension multiplexing
(WDM) so that both directions of the signal flow can transmit over one
fiber-optic cable. You also have the option of connecting the units with two
coaxial cables, one cable for each direction of the signal flow.
• An
FIM-108S
interface pair connects over one single-mode fiber-optic cable.
Like the FIM-108M unit, the FIM-108S unit combines the send and receive
signals through wave-dimension multiplexing (WDM), so that both directions
of the signal flow can transmit on one fiber-optic cable. As with the other
versions, you can optionally connect the units with coaxial cable.
Table 1: Summary of FIM-108 Fiber-Optic Connection Options
NOTE
: Throughout this manual the interface will be referred to generally as the
“FIM-108 interface.” The D, M, and S designations will only be used when it is
necessary to distingish between the three versions of the interface. When you see the
term “FIM-108 interface,” you can assume that the text refers generally to all versions.
INTERFACE
# FIBERS
FIBER MODE
FIBER RANGE
FIM-108D
2
single mode
or multimode
3 miles or 5 km (multimode)
12 miles or 20 km (single mode)
FIM-108M
1
multimode
3 miles (5 km)
FIM-108S
1
single mode
12 miles (20) km
The Clear-Com FIM-108
System links up to eight
intercom stations to the
central matrix frame over
fiber optic or coaxial cable.
With fiber-optic cable, you
can place the stations at
distances of up to 12 miles
(20 km) from the central
frame.
1