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TCX1000-RDM20 Features


This topic describes the features supported by the TCX1000-RDM20.

20-Port Route and Select ROADM

The TCX1000-RDM20 is a reconfigurable add-drop multiplexer (ROADM) that multiplexes and demultiplexes wavelengths (channels) from the 20 universal ports to a single composite signal for transmission out its line port.

The TCX1000-RDM20 is a route and select ROADM element that is logically separated into two discrete paths:

  • Multiplexing path — 20 universal input (Add) ports labeled Ux In are multiplexed, amplified by a booster and routed to the Line Out port. For shorter spans, a variable optical attenuator automatically provides short span line padding.

  • Demultiplexing path — The multiplexed composite signal is received by the TCX1000-RDM20 on the Line In port. A preamplifier amplifies the composite signal, which is then fed to the demultiplexer. The signal is demultiplexed and the channels are dropped to the 20 universal output (Drop) ports labeled Ux Out.

Reconfiguring the channels on the universal ports is controlled through the proNX Optical Director, enabling you to reroute channels dynamically.

You can use the universal ports:

  • To directly add/drop channels onto the optical network.

  • To provide a secondary multiplexing function when connected to external optical multiplexer-demultiplexer devices for channel port expansion.

    For example, connecting the TCX1000-2D8CMD colorless multiplexer to a universal port, enables you to add an additional eight colorless ports for transceiver connections to the TCX1000-RDM20.

    Alternatively, connecting the Juniper Networks BTI7800-FMD96 fixed optical multiplexer-demultiplexer to a single universal port enables the TCX1000-RDM20 to support up to 96 x 200 Gbps coherent channels on a fixed 50 GHz grid.

  • By configuring multiple TCX1000-RDM20s in a single node, you can form multi-directional or degree nodes and use the universal ports to cross-connect channels between the nodes. This is referred to as pass-through. You can create true ROADM sites that scale from a 2-degree ROADM node up to high degree solutions for multi-directional switching in point-to-point, ring, mesh, and linear multi-span network configurations.

Complete End-to-End Juniper Networks Coherent Packet-Optical Solution

In this release, the TCX1000-RDM20 scales to 19.2 Tbps when used with 96 x 200 Gbps coherent channels on the universal add/drop ports. It supports a diverse range of packet-optical network configurations, including point-to-point, ring, mesh and linear multi-span configurations for ultra high capacity connectivity in the metro and between data centers. It provides complete support for compatible 100 Gbps and 200 Gbps coherent interfaces across Juniper Networks routers and switches and BTI7800 platforms.

The proNX Optical Director controls and manages the optical control layer for all TCX1000 managed devices, as well as compatible optical interfaces in your Juniper Networks routers and switches and BTI7800 Universal Forwarding Modules (UFM3 and UFM6).

TCX1000-RDM20 Colorless, Directionless, Contentionless Operation

The TCX1000-RDM20 supports colorless, directionless and contentionless operation as follows:

  • Colorless — The universal ports on the TCX1000-RDM20 have no assigned or fixed frequency; the universal ports are colorless until you provision a wavelength to that port. You can assign any wavelength to any universal port.

  • Directionless — The TCX1000-RDM20 when used with an appropriate optical multiplexer, supports directionless operation. The TCX1000-2D8CMD is a colorless and two directional multiplexer. When TCX1000-RDM20 is used with TCX1000-2D8CMD, two directional selection is supported. More capable optical multiplexers can be added in-service to extend the capability of the node when they are available.

  • Contentionless — The TCX1000-RDM20 when used with an appropriate multiplexer supports contentionless operation. When a directionless, contentionless multiplexer is available it can be placed in-service to extend the capability of the ROADM node.

  • Flex Grid — The hardware of the TCX1000-RDM20 is flex grid ready. However the proNX Optical Director does not yet support the ability to configure the channel width.

Integrated Optical Amplification

The TCX1000-RDM20 integrates booster and pre-amplification to compensate for link and component losses.

Support for Multiple Fiber Types

The TCX1000-RDM20 supports the following fiber types:

  • Single mode fiber (SMF)

  • Enhanced large effective area fiber (ELEAF)

  • Truewave

  • Truewave Classic

  • Non - zero dispersion shifted fiber (NZ-DSF)

  • Dispersion shifted fiber (DSF)

  • Single mode fiber-LEAF Submarine (SMF-LS)

Integrated Optical Service Channel

The TCX1000-RDM20 supports a 1511 nm Ethernet optical service channel (OSC) that provides management connectivity to the device over its line port and also assists in zero-channel turn-up and the optical safety for the system.

For remote sites that have limited access to your DCN HA and the proNX Optical Director, you can remotely manage the TCX1000-RDM20 over its line port using the OSC.

The TCX1000-RDM20 OSC is fully compatible with the TCX1000-ILA OSC.

Automatic Laser Shutdown

Due to the potential safety hazard that is posed by the high power optical outputs, the TCX1000-RDM20 has an automatic laser shutdown (ALS) mechanism that guards against the risk of direct human exposure to high-powered lasers.

The ALS mechanism acts to detect a fiber disconnection or fiber cuts along the span, and upon doing so, causes the shutdown of the high-powered WDM composite signal.

TCX1000 Performance Monitoring

The TCX1000-RDM20 and TCX1000-ILA both report performance metrics to the proNX Optical Director for all external ports on their systems. They also both have a number of internal monitors that provide information about the total optical powers and, for the TCX1000-RDM20, the per-channel powers (spectral information) at different points within the system. You can measure performance from these internal monitors at the external ports on both of these devices.

The proNX Optical Director also provides a number of performance monitoring and control functions including monitoring and compensating for span loss in the fiber spans between the line ports on the TCX1000-RDM20 and TCX1000-ILA. The proNX Optical Director monitors this loss continuous and proactively and dynamically adjusts its amplifier settings to compensate for the loss in the fiber spans. It also provides alarming when it is unable to keep the span loss within the allowable dB levels.

In addition, the proNX Optical Director monitors the pass-through fiber connections between TCX1000-RDM20s universal ports in multi-degree ROADM nodes and provides alarming when the loss is out of range.

The proNX Optical Director also monitors and controls individual channel power over the entire channel path in the network.

TCX1000-RDM20 Management Features

All TCX Series hardware is managed by proNX Optical Director, Juniper Networks open, microservices-based optical control and management platform. The proNX Optical Director control and management software disaggregates the optical control layer from the device hardware, allowing you to configure the optical control plane settings on the managed device dynamically, including software upgrades and device updates, while maintaining services.

TCX1000-RDM20 Ports

The TCX1000-RDM20 has the following ports:

  • Line port (duplex LC/UPC) to connect to system fiber

  • Monitor port (duplex LC/UPC) to provide optical monitoring access in both directions

  • 20 universal ports (duplex LC/UPC) that provide node side connections to optical multiplexers, coherent transceivers, and other TCX1000-RDM20 universal ports for pass-through traffic between multi-degree ROADM nodes.

  • A 1511 nm and 1611 nm OSC port (duplex LC/UPC). The 1511 nm OSC connects to connects externally to an the SFP optical transceiver.


    In this release, we supply a 1511 nm SFP transceiver for the OSC function and the 1611 nm OSC port is not used. You can use the 1611 nm port (OSC 1) to connect external test equipment

  • Dual-DCN (DCN 0 and DCN 1) Ethernet ports (RJ-45) that connect internally to a Layer 2 switch and the device’s CPU. You use the dual-DCN ports to connect the TCX1000-RDM20 to your DCN HA management network for redundant management communications to the device.

  • Ethernet Craft port (RJ-45) and the USB port connect internally to a Layer 2 switch and the device’s CPU for local management communications. These ports are used only for initial configuration of the device before it is deployed to the optical network.