Alcatel-Lucent 7330 - Figure 2-2 Typical Outside Plant Arrangement

2 — Part numbers, ordering, and deployment configuration overview
Alcatel-Lucent 7330/7302 ISAM FTTN R04.02.42a March 2011 2-17
3FE 54199 AAAA TCZZA Edition 01 ONT Product Information Guide
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 2-2 shows a typical outside plant
arrangement.
Figure 2-2 Typical outside plant arrangement
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.
21218
Splitter
cabinet
Distribution
cabinet
SS SS
Customer premises
Central office
ONT
Fiber
36> fiber cable
(feeder)
32> fiber cables
(PON distribution)
PON distribution cables
OLT
FTP
Splice CaseS
Optical Line TerminationOLT
Legend: