Typical Optical Fiber Outside Plant Architecture; Distance And Performance Considerations; Typical Outside Plant Arrangement - Alcatel-Lucent 7302 Information Manual

Typical optical fiber outside plant architecture

The outside plant consists of optical fiber cables, splicing enclosures, fiber
distribution cabinets or enclosures, and drop boxes. The outside plant can be
implemented using different architectures. The specific architecture can greatly
affect the cost of deployment.
The key factors that significantly influence the cost of the architecture include:
•
plant type, such as aerial or buried
•
home density
•
splitter location
•
expected penetration rates
A typical system uses two levels of distribution and splitting. A primary flexibility
point provides rough granularity for splitting the fiber, followed by a final drop or
secondary flexibility point where the final split and drops to the ONTs at the
premises are implemented. This basic architecture is cost-effective while also
retaining flexibility for the future. Figure
arrangement.
Central office
FTP
OLT
36> fiber cable
(feeder)
Legend:
OLT Optical Line Termination
S Splice Case

Distance and performance considerations

System performance varies in proportion to the amount of data that is transmitted to
and from the subscriber location.
The system is designed to support a long reach from the CO to the subscriber
location. The maximum reach capacity is typically 18.6 mi (30 km) for GPON LT
cards. The optical link budget is defined by both loss and bandwidth characteristics.
The loss characteristic is determined by the difference between the optical
transmitter and optical receiver for each direction, and is typically 28 dB. The
bandwidth characteristic is determined by the maximum link distance parameter of
each OLT and ONT transmitter specification, and is limited by the lower of the
upstream and downstream values.
Alcatel-Lucent 7302 ISAM | 7330 ISAM FTTN | 7360 ISAM FX ONT R04.06.02
3FE 55873 AAAA TCZZA Edition 01
ONT Product Information Guide
2 — Part numbers, ordering, and deployment configuration overview
Figure 2-2 Typical outside plant arrangement
S S
Splitter
cabinet
32> fiber cables
(PON distribution)
2-2 shows a typical outside plant
PON distribution cables
S S
Distribution
cabinet
Fiber
November 2013
Customer premises
ONT
21218
2-43