JCO400 Coherent Optical Transceivers

JCO400 Coherent Optical Transceivers help operators achieve their capital, operational, and user experience goals. A core component of the Juniper Converged Optical Routing Architecture (CORA), this innovative series is essential to the transformation strategies of both service providers and cloud operators looking to 400G and beyond.

JCO400 series optics minimize TCO through industry-leading power efficiency, operational simplicity, an open architecture, and an integrated DWDM design. Juniper JCO400-ZR and JCO400-ZR+ optics are supported by 400G platforms in Juniper ACX Series, MX Series, and PTX Series routers, as well as in Juniper QFX Series Switches. Ideal for access, edge, core, data center, and cloud use cases, the transceivers support an open and interoperable networking ecosystem.

Key Features

  • Form factor: QSFP56-DD
  • Speed/mode: 1 x 100 GbE, 2 x 100 GbE, 3 x 100 GbE, 4 x 100 GbE, 1 x 400 GbE
  • Distance: 40 km to 2,000 km

Features + Benefits

Industry-Leading Power Efficiency

Best-in-class power efficiency in an optimized form factor suits a range of metro, edge, and core network use cases, including data center interconnect (DCI), mobile backhaul, next-gen packet cores, and more. 

Operational Simplicity

JCO400 series optics are fully integrated into Junos OS and Junos OS Evolved for simple and flexible configuration, performance monitoring, and end-to-end testing of the optical elements of the network.

Streamlined Multivendor Management

Juniper supports standardized OpenConfig models for vendor-agnostic management of 400G coherent optics, easing integration, deployment, and network maintenance.

Open and Interoperable

JCO400 series optics support flexible configurations and channelized modes that comply with Optical Internetworking Forum (OIF) 400ZR and OpenZR+ Multi-Source Agreement (MSA) Group specifications. 

Go-To Expertise

As an active contributing member of the OIF, OpenZR+, and other key optical standards bodies, Juniper is working at the forefront of building open and interoperable networking ecosystems. Our standards-compliant, multivendor environment diversifies and stabilizes the component supply chain to ensure product availability and improve lead times.

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Resource Center


Akamai connects its massively distributed cloud with Juniper 400G

Akamai has powered and secured digital life from the earliest days of the Internet, and it views the introduction of Akamai Connected Cloud as its future. Akamai Connected Cloud is a massively distributed edge and cloud platform for cloud computing, security, and content delivery.

To deliver Akamai Connected Cloud services to customers, Akamai completely reimagined how it builds and scales its global network with Juniper 400G routing and integrated coherent optics.

Akamai image

Find JCO400 in these solutions

Cloud Metro

Apply cloud principles to metro networks to achieve sustainable business growth with future-proof performance, adaptive power innovation, embedded active assurance, and zero trust security.


Juniper offers the industry’s most comprehensive and high-performing 400G routing and switching platforms: PTX Series Packet Transport RoutersMX Series Universal Routing Platforms, ACX Series Routers, and QFX Series Switches. These platforms increase efficiencies throughout your infrastructure while keeping your network secure and highly customizable.

Converged Optical Routing Architecture (CORA)

CORA is an extensible, sustainable, automated solution for IP-optical convergence. It delivers the essential building blocks operators need to deploy IP-over-DWDM transformative strategies for 400G networking and beyond in metro, edge, and core networks.

Juniper Paragon

The Juniper Paragon portfolio delivers closed-loop automation, translating business intent into tangible outcomes. Paragon ensures that your customers receive assured service experiences throughout the network lifecycle, from Day 0 to Day 2+.

JCO400 Coherent Optical Transceivers FAQs

What are Juniper’s coherent optics?

Juniper JCO400 Coherent Optical Transceivers form the cornerstone of the Juniper Converged Optical Routing Architecture (CORA). They provide the fundamental elements necessary for service providers, cloud operators, enterprises, and government agencies to unlock the full potential of their IP-over-DWDM strategies for 400G networking and beyond. Juniper's JCO400-QDD-ZR and JCO400-QDD-ZR-M are compliant with Optical Internetworking Forum (OIF) 400ZR and OpenZR+ standards. These best-in-class, power-efficient, and coherent 400G DWDM modules seamlessly integrate with Juniper ACX Series, MX Series, and PTX Series routers, as well as with Juniper QFX Series Switches.

What use cases does the Juniper JCO400 series support?

The transceivers support a variety of network use cases. They’re ideal for metro, regional, core, data center interconnect (DCI), and cloud networks, allowing operators to extend their network reach beyond the limits of previous DWDM technology. They support an open and interoperable networking ecosystem and enable service providers and cloud providers to realize the substantial TCO savings of a converged IP-optical infrastructure.

Why buy Juniper-branded JCO400-ZR/ZR+ optics?

JCO400 optics deliver industry-leading power efficiency and operational simplicity in a footprint-optimized form factor. They enable service providers and cloud providers to deploy Juniper CORA for a converged IP-optical infrastructure that eliminates the need for separate DWDM transponders, reducing complexity and CapEx.

JCO400 optics are compliant with the latest revision of the OIF Common Management Interface Specification (CMIS). Accordingly, Juniper’s 400G ZR/ZR+ optics can establish and maintain the media-side transmission link independent of the presence of host-side client signals. This ability to separate the host and line sides simplifies testing and provisioning of the optical elements of the network, independent of the IP-Ethernet layer.