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Overview

The 400ZR is an Optical Interworking Forum (OIF) standard for transporting 400GbE over long distances through fiber optic cables. The standard defines the solution to transport 400GbE optical signals using a single wavelength.

The primary application of 400ZR optics (model numbers QDD-400-ZR and JCO400-QDD-ZR) is to interconnect data centers within a distance of up to 120 km. Data centers require high bandwidth, high speed, and low latency networks. The 400ZR optical module meets these requirements.

400G OpenZR+ (model numbers: QDD-400 ZR-M, JCO400-QDD-ZR-M, and QDD-400G-ZR-M-HP) is an extension of 400ZR specifications to improve performance and adheres to OpenZR+ MSA standard.

Some characteristics of the 400ZR and 400G OpenZR+ optics are:

  • Configuration of different speeds and negotiation between capacity and reach. For example, 400 Gbps can support nominal reach of 500 km, 300 Gbps up to 900 km, and 200 Gbps up to 2000 km. Exact reach depends on an optical line system that is in use (400G OpenZR+ optics only).

  • Capacity to transport 4x100 Gbps and 1x400 Gbps.

  • Capacity to carry the signals across long distances through fiber optic cables with periodic optical amplification.

  • Fully C-band tunable and dense wavelength-division multiplexing (DWDM). We support 75-GHz and 100-GHz channel spacings.

  • Ability to operate in amplified and unamplified modes.

  • Support for 400 Gbps speed. You can use the port as one 400GbE interface or channelize it to operate as four 100GbE interfaces.

    For product specification and compatibility, see Hardware Compatibility Tool.

Benefits of 400ZR and 400G OpenZR+ Optics

  • Cost efficiency: Operators can use 400ZR and 400G OpenZR+ coherent DWDM pluggable optics in IP routers and switches, and directly interconnect to a DWDM line system. The use of these transceivers eliminates the need for external optical transponders, thereby reducing infrastructure maintenance costs and OpEx for the operators.

  • Reduced carbon footprint, and power and space consumption:

    400ZR and 400G OpenZR+ optics reduce power consumption by up to 50 percent by eliminating the need for external transponders. The elimination of transponders also results in reduced carbon footprint and space requirement.

  • Increased system efficiency:

    400ZR and 400G OpenZR+ optics simplify operations with standard APIs and open data model.

  • Channelization support: 400ZR supports channelization of 1x400 Gbps and 4x100 Gbps speeds (muxponder mode). 400G OpenZR+ supports the following channelizations:

    • 1x400 Gbps

    • 4x100 Gbps

    • 3x100 Gbps

    • 2x100 Gbps

    • 1x100 Gbps

    As you decrease speed, your reach capability increases and power consumption decreases.

  • 0dBm output transmit power: QDD-400G-ZR-M-HP models can operate in high power mode and deliver a transmit power output of 0 dBm.

Table 1: Optics-Supported Devices

Feature

Supported Devices

Initial Release
Application Selection

PTX10001-36MR

Junos OS Evolved 23.1 R1
PTX10004, PTX10008, PTX10016 Junos OS Evolved 24.2 R1
Target Output Power

PTX10001-36MR

Junos OS Evolved 23.1 R1
PTX10004, PTX10008, PTX10016 Junos OS Evolved 24.2 R1
Enhanced Loopback Options

PTX10001-36MR

Junos OS Evolved 23.1 R1

Licensing

You need a license to use the 400ZR and 400G OpenZR+ standards.  For information about the licensing model for  the coherent 400ZR and 400G OpenZR+ optics, see Software Licenses for Juniper Coherent Optics. For additional information about License management, see Licensing Guide. You can also contact your Juniper Account Team or Juniper Partner.