• Juniper QDD-400G-ER4-30 400G QSFP-DD ER4 transceiver with pink fruit sticker
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Juniper

Juniper QDD-400G-ER4-30 | 400G | QSFP-DD | ER4 | 1310 nm LWDM | 30 km | Duplex LC

QDD-400G-ER4-30

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Description

Long-reach 400G ER4 QSFP-DD module for metro and DCI links up to 30 km over OS2 single-mode fiber. Uses 1310 nm LAN-WDM wavelengths with duplex LC connectivity for simplified point-to-point deployments without amplifiers on typical spans.

Features

- Extended 30 km reach for metro/DCI links
- Simple duplex LC cabling
- LAN-WDM optics for robust long-haul performance
- Standards-aligned MSA implementation
- Efficient 400G aggregation on single-mode fiber

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-DD
- Standard: 400G ER4 (MSA)
- Wavelengths: 4x LAN-WDM in the 1310 nm window
- Fiber type: Single-mode (OS2)
- Reach: up to 30 km
- Connector: Duplex LC
- Lane configuration: 4x100G PAM4
- FEC: KP4 required on host
- Operating temperature: 0 to 70°C (standard)
- Digital diagnostics (DDM/DOM): Supported

FAQs

Q: Is this interoperable with 400G FR4 optics?
A: No. ER4 and FR4 use different optical specifications and are not intended for direct interoperability.

Q: Do I need optical amplifiers or dispersion compensation?
A: Typically no for links within 30 km over standard OS2 SMF, assuming proper link budget and clean fiber.

Q: What fiber type is recommended?
A: Use OS2 single-mode fiber for best performance and to meet the ER4 reach specification.

Q: Is FEC required?
A: Yes, KP4 FEC on the host is required to achieve the specified BER.

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