• Vibrant pink glossy Juniper QDD-2X400G-LR4-10 fruit sticker
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Juniper

Juniper QDD-2X400G-LR4-10 | 2x400G QSFP-DD800 | 400GBASE-LR4-10 | 1310 nm CWDM4 | 10 km SMF | Dual CS connector

QDD-2X400G-LR4-10

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Description

QSFP-DD800 transceiver providing two independent 400G LR4-10 links over single-mode fiber up to 10 km. Designed for 800G ports operating in 2x400G breakout mode across metro edge and leaf/spine cores. Uses CWDM4 optics around 1310 nm with dual CS connectors; host-side FEC required. Supports DOM and interoperates with standards-compliant 400GBASE-LR4-10 on the far end using CS.

Features

- Dual 400G LR4-10 links from one QSFP-DD800 slot
- 10 km reach over SMF for metro and campus backbones
- CS connectors reduce panel density and maintain polarity
- Standards-based for multi-vendor interoperability
- Digital diagnostics for visibility and troubleshooting
- KP4 FEC compatibility for reliable high-speed links

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Technical Specifications

- Form factor: QSFP-DD800
- Port breakout: 2x400G
- Optical standard: 400GBASE-LR4-10 (IEEE 802.3cu)
- Wavelengths: CWDM4 around 1310 nm (4 lanes)
- Fiber type: SMF (OS2 recommended)
- Reach: up to 10 km
- Connector: Dual CS (one CS per 400G link)
- Operating temperature: 0 to 70 C
- FEC: Host-side KP4 (RS(544,514)) required
- DDM/DOM: Supported
- Use case: Break out one 800G port into two independent 400G LR4-10 links

FAQs

Q: What type of connector does this use?
A: Dual CS connectors—each 400G link uses one CS interface.

Q: Is it compatible with standard 400G LR4-10 on the other end?
A: Yes, it interops with 400GBASE-LR4-10 optics using CS connectors.

Q: What fiber should I deploy?
A: OS2 single-mode fiber is recommended for 10 km reach.

Q: Does it require FEC?
A: Yes, KP4 FEC on the host is required for PAM4 modulation.

Q: Can I run it in a non-breakout 800G mode?
A: No, this module is intended for 2x400G breakout operation.

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