Two-Degree Node; Functional Component Overview; Iplc Base Module Functional Components; Figure 2: Combined Functions Of The Iplc Base And Expansion Modules - Juniper PTX3000 IPLC Features Manual

Functional Component Overview

Copyright © 2018, Juniper Networks, Inc.
Chapter 1: Understanding the PTX3000 Integrated Photonic Line System Architecture and Configuration
for amplification and equalization. All 32 channels on the IPLC base module are 100 GHz
spaced, per the ITU-T Grid Specifications (G.694.1). The 32 channels on the IPLC
expansion module are offset from the IPLC base module channels by 50 GHz.

Two-Degree Node

For ring topologies and other network topologies that require a two-degree node for
east-and west communications, you can connect two IPLC base modules together
through the -
PT IN PT OUT
form a two-degree node. Two-degree nodes enable you to route wavelengths in both
directions.
The high-level optical functional block diagram of the combined functions of both the
IPLC base module and the IPLC expansion module are shown in

Figure 2: Combined Functions of the IPLC Base and Expansion Modules

IPLC Base Module Functional Components

The main building blocks of the IPLC base module architecture are as follows:
A 2x1 wavelength selective switch (WSS) on the add path selects wavelengths from
among all channels presented from the 32
in blue in Figure 2 on page
(shown in gray in Figure 2 on page
A booster erbium-doped fiber amplifier (EDFA) (E1) followed by a variable optical
attenuator (VOA) compensate for the loss of the WSS, multiplexer, and 3 dB coupler.
A variable gain preamplifier EDFA (E2) to compensate for the loss of the preceding
fiber span.
An optical channel monitor (OCM) with three points of observation including the
following:
Booster EDFA (E1) output
Preamplifier EDFA (E2) output
The combined channels of the local add function at the input of the WSS, which
indicates which channels (both odd and even channels) are being added locally
ports on the front panel and enter a few CLI commands to
ports of the IPLC base module (shown
Add
7) and from the 32 ports on the IPLC expansion module
Add
7).
Figure 2 on page 7.
7