CommScope BOSTM BrightPath Optical Solutions - Manual (Page 12)

BrightPath components
Tap enclosure and optical tap module
The tap enclosure consists of three main sections; a distribution side for con-
nection to the network, a drop side for connection to the residence and, sand-
wiched between them, the optical tap module. The tap is a passive (non-pow-
ered) device that can be ordered with anywhere from two to eight connectorized
outputs and non-connectorized fibers that permit the signal to continue along
the distribution cable. The distribution cable fibers are fusion-spliced to the tap.
Drop cables are connectorized and plugged into adapters in the drop side.
Network Interface Device/Network Interface Unit
The NID attaches to the side of the residence and houses the NIU, a powered optical
converter/amplifier that converts the downstream 1550 nm signal into RF for distribu-
tion in the home. It also converts RF into a 1310 nm optical signal for transmission
back up the same fiber toward the headend. The NIU draws low-voltage power at the
residence. The NIU is secured in the NID after the NID is attached to the residence.
Optical node (for node-based systems)
The optical node amplifies and splits headend signals for downstream distribu-
tion at the 1550 nm wavelength and upstream at the 1310 nm wavelength. A
diplexer separates the signals. The node significantly increases the 1550 nm sig-
nal using an EDFA amplifier and divides it into eight fiber outputs. Typically, two
four-fiber distribution cables will leave the node.
Upstream 1310 nm signals return on the same fiber. The node conditions and
multiplexes them for transmission back to the headend over the same feeder
fiber as the 1550 nm signal. The node is powered like a coaxial amplifier.
distribution
side
drop
side
3.6 BrightPath ® Cables and Components
Components