System Profile; Overview - Fujitsu 1FINITY L100 User Manual

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System Description and Engineering

System Profile

1.1
System Profile
In this section:
1.1.1

Overview

1.1.1
Overview
The 1FINITY L-Series solution is Fujitsu next-generation ROADM network solution, which consists of an L100
ROADM configuration, an L130 ROADM configuration, an L160 Raman configuration, and an L200 ILA
configuration. The L100 ROADM configuration is based on Colorless, Directionless (CD) and flexible grid add/drop
architecture. The L130 ROADM configuration is based on Colorless, Directionless, Contentionless (CDC) and
flexible grid architecture. A state-of-the-art ROADM network can be constructed with the L100 configuration, or
the L130 configuration, or a combination of both configurations. The L-Series solution provides the optimal level
of flexibility at the optical layer to support rapid bandwidth and capacity provisioning, topology flexibility, and
simplified operations.
Colorless
Classic ROADMs are limited by fixed add/drop transceiver and wavelength assignments. Wavelengths selected in
these deployments rely on transceivers that are manually connected to the right mux/demux port at the add/
drop side. All add/drop sides must be physically wired and rewired whenever a change is made.
A colorless ROADM automates the assignment of add/drop wavelength functionality through the use of
additional Wavelength Selectable Switches (WSSs) in place of different mux/demux ports. Any wavelength can be
assigned to any port at the add/drop side without a technician.
Directionless
Classic ROADMs are directionally dependent, which means add/drop port pairs and the transponders connected
to them are fixed to an outgoing direction. Directionless ROADMs allow any wavelength to route in any direction
served by the node.
Contentionless
Wavelength blocking occurs when two wavelengths of the same color converge at the same WSS at the same
time, creating network contention. Classic ROADMs require operators to manually partition the add/drop
structures so that different colored wavelengths are associated with different structures.
This approach reduces flexibility and requires extra add/drop structures to accommodate particular channels.
Contentionless architecture, by contrast, allows multiple copies on the same wavelength on a single add/drop
structure with no partitioning restrictions.
· Fujitsu and Fujitsu Customer Use Only
Release 19.1.1 Issue 1.1, May 2021