Fiberplex FOI-5402, User Manual, Page: 5 / 16

Introduction
The FOI‐5402and TD‐5402 provide complete electrical isolation for E1 communications. There is no need to
reconfigure your devices; simply plug the device at each end of your E1 line into one of these modules, and
enjoy a secure, stable, and electrically isolated connection.
Key Features

Data Rate: 2.048 Mbps

Supports Euro ISDN PRI (Primary Rate Interface) services, also known as PRA (Primary Rate Access)

30B+D data passes transparently
Theory of Operation
The FOI‐5402 provides complete electrical isolation for E1 communications. It is functionally similar to the
obsolete FiberPlex product, the FOI‐4048, the physical difference being that the electrical data connection is
made through a RJ‐45 connector instead of the DA‐15 connector on the FOI‐4048.
The FOI‐5402 is NOT backward compatible with the FOI‐4048.
The FOI unit can be used in areas of high electrical noise or in and out of RF shielded enclosures. The fiber
optic cable is not susceptible to interference caused by impulse noise, crosstalk, or EMI. Privacy of
communications is also enhanced because the fiber optic cable does not radiate any emissions.
In addition, fiber optic cable offers much longer transmission distances than copper wiring. Traditional E1
cabling is limited to a maximum distance of 4800ft (1.46km), but multimode optics on the unit can extend the
distance to 2km, while singlemode optics can further extend the distance to 20km. A typical link consists of
two FOI‐5402, one at each end of the network, with a duplex fiber optic cable between them.
Differences between FOI‐5402 and TD‐5402
Functionally, the FOI‐5402 and TD‐5402 are identical. The only differences are the packaging and power supply
compatibility. The FOI‐5402 is part of the FOI line of products designed for ruggedized military applications. It
is housed in a RF‐shielded can enclosure. For standalone applications it can be powered by adding a PSQ‐4909
AC supply or a PSQ‐4920 DC power supply (not included). Optionally, up to 8 FOI units can be mounted on
CMA chassis adapters and installed in an RMC‐3101 or RMC‐2101 rack mount chassis, which provide
redundant power to the units through a common backplane connection.
The TD‐5402 is housed in the commercial ‘Throw Down’ packaging. This version is designed to be a workhorse
unit in various commercial and industrial environments. It is powered either by a 9VDC wall adapter (included)
or via bussed power supplied through an integrated three‐pin Phoenix™ connector. Up to six TD‐5402 units
can be installed in the optional 1U TDR‐01 rack shelf.
Getting Started
Initial Inspection
Immediately upon receipt, inspect the shipping container for damage. The container should be retained until
the shipment has been checked for completeness and the equipment has been checked mechanically and
electrically. If the shipment is incomplete, if there is mechanical damage, or if the unit fails to operate notify
FiberPlex and make the shipping materials available for the carrier's inspection.