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Integrated Photonic Line Card Base and Expansion Module Overview


The PTX3000 integrated photonic line system is a fully integrated photonic line system for converged core and metro core packet optical networks running point-to-point and ring topologies. The PTX3000 integrated photonic line system includes the following optional components:

  • Integrated photonic line card (IPLC) base module

  • Integrated photonic line card (IPLC) expansion module

The external optical inline amplifier (ILA) provides periodic amplification of the optical line signal to enable long distance transmission.

A comprehensive management strategy enables complete management through both the Junos OS CLI and optionally through the Connectivity Services Director (CSD) application running on the Junos Space Network Management Platform.

To complete the optical solution, Juniper Networks integrated 100G Coherent transponders can be leveraged, along with the IPLC base module, IPLC expansion module, optical ILA and CSD to provide an end-to-end, fully managed packet optical solution.

This topic provides an overview of the integrated photonic line card (IPLC) base module and expansion module and includes the following sections:


The IPLC base module provides the combined functionality of a 32-port reconfigurable optical add/drop multiplexer (ROADM), optical amplifier, optical equalizer, and optical channel monitor on a single card. It enables ad-hoc allocation of network bandwidth for high-demand, real-time applications, and network services that are delivered over an optical fiber infrastructure. You can use the IPLC expansion module to increase the system capacity to 64 channels.

Figure 1: IPLC Point-to-Point Configuration
IPLC Point-to-Point Configuration

Figure 1 shows a typical IPLC point-to-point configuration. In this configuration, the Line IN and Line OUT ports on the front of the IPLC base modules are connected to Juniper Networks’ optical inline amplifier (ILA) in the optical fiber network. Optical ILA nodes are typically placed into the network where the fiber length is greater than 80—100 km. For a complete description of the IPLC hardware and optical ILA, see the PTX3000 Packet Transport Router with Integrated Photonic Line Card.

For ring configurations and other configurations that require east-west communications, you can connect two IPLC base modules together to form a two-degree node that consists of two 32-port ROADMs, each with its own line termination. You can also express traffic east-west on a wavelength-by-wavelength basis. You configure all channel routing through software.

Configuring, Managing, and Monitoring the IPLC

You can configure, manage, and monitor the components of the PTX3000 integrated photonic line system in several ways. This section provides an overview of these methods and their capabilities.

Junos OS CLI

Using the Junos OS CLI, you can configure, manage, and monitor IPLC modules in a similar way to standard PTX3000 Series line cards—that is, by entering a minimum set of CLI commands and making the proper physical connections between the various components on the front panel of the line system.

Starting with Junos OS Release 17.1R1, you can configure and manage optical ILAs across the optical supervisory channel (OSC) of the amplifier chain of the PTX3000 integrated photonic line system.

Junos Space Connectivity Services Director

Optionally, you can use the GUI-based Junos Space Connectivity Services Director to configure, manage, and monitor the IPLC. For a complete description of the Junos Space Connectivity Services Director software, see Junos Space Connectivity Services Director.


You can use SNMP to configure and manage both IPLC modules and the optical ILA.

Optical Supervisory Channel

An integrated optical supervisory channel (OSC) automates control of the optical layer by providing control and management of the line system components, as well as optical ILAs in the amplifier chain.

High Availability, Resiliency, and Integrity

The integrated photonic line system is a standalone appliance that resides in the PTX3000 chassis. There is no data path between IPLC modules and the high-speed backplane or the interface cards in the chassis. Because the IPLC modules are not connected to the PTX3000 high-speed backplane, resets and upgrades to the system software do not affect traffic running on the IPLC modules. From an optical perspective, the IPLC modules tolerate both fast and slow changes in physical conditions. For example, if a large number of optical channels disappear due to a fiber cut, the IPLC has sophisticated control circuitry that prevents any errors on the remaining channels. Similarly, slow degradation of the fiber plant is also accommodated to ensure optimal performance across the lifespan of the system. To ensure error-free transmission across both long fiber runs and large numbers of wavelengths on spans, IPLC modules and optical ILAs automatically controls the power of each channel.

Usability, Serviceability, Security and Troubleshooting

Traditionally, wavelength-division multiplexing (WDM) systems and subsystems have relied on a high degree of manual configuration and fine-tuning from expert users to enable signals to be transmitted error free across the inherently analog medium of optical fiber. The IPLC automates these activities to the point that adding a wavelength is as simple as configuring a port on the router. No optical expertise is required because the IPLC automates the introduction, removal, and balancing of optical channels and you simply need to enable the traffic-carrying port by setting some basic Junos OS CLI commands.

WDM networks typically contain many elements and identifying underlying failure points is often complex. With the IPLC, if at any point traffic is interrupted, the system raises a number of alarms to notify the management and control layers of the system and also to help quickly and easily identify the root cause of the failure.

Performance Monitors

Alarms and analog performance monitors are available to allow expert or non-expert users easily identify and localize faults. Performance monitors monitor analog data and alarms enabling you to quickly view the health of the line system as well as the amplifier chain. You can quickly and easily configure and enable alarm thresholds at the various monitoring points on both IPLC modules and the optical ILA.

Release History Table
Starting with Junos OS Release 17.1R1