• HYTOPTODEVICE Juniper QDD-4X100G-LR compatible 400G QSFP-DD PLR4 PAM4 1310nm 10km MPO OS2 fiber bulk wholesale
  • Low power high density 400G PLR4 transceiver for Juniper data center bulk deployment
  • Juniper compatible Plug and play  zero-warning 400G QSFP-DD PLR4 for wholesale clients
  • hytoptodevice qsfp-dd 400g optical transceiver module 1310NM 10km PLR4 MPO SMF from hytoptodevice
  • HYTOPTODEVICE Juniper QDD-4X100G-LR compatible 400G QSFP-DD PLR4 PAM4 1310nm 10km MPO OS2 fiber bulk wholesale
  • Low power high density 400G PLR4 transceiver for Juniper data center bulk deployment
  • Juniper compatible Plug and play  zero-warning 400G QSFP-DD PLR4 for wholesale clients
  • hytoptodevice qsfp-dd 400g optical transceiver module 1310NM 10km PLR4 MPO SMF from hytoptodevice

Juniper QDD-4X100G-LR  Compatible 400G QSFP-DD PLR4 Optical Transceiver Module | PAM4 1310nm 10km Bulk Factory Wholesale | HYTOPTODEVICE

HYTOPTODEVICE Juniper QDD-4X100G-LR replacement 400G QSFP-DD PLR4 single-mode optic, 4×100G PAM4 lanes, 1310nm wavelength, 10km OS2 MPO-12 APC fiber. Pre-programmed for Junos zero-alarm deployment, built-in RS-FEC and DDM monitoring. Ideal for bulk wholesale, 400G trunking and 400G-to-4×100G breakout on Juniper leaf-spine fabrics. Support private label, custom EEPROM Programming for global importers, distributors and procurement managers.
NO. Brand  Compatible P/N Remarks
1 Cisco QDD-4X100G-LR-S
2 Arista   QDD-400G-PLR4
3 Dell  400G-Q56-DD-LDR4
4 HPE Aruba S3N94A
5 Juniper QDD-4X100G-LR 
6 Extreme  400G-LR4P-QSFPDD10KM 
7 H3C  400GBASE-PLR4 
Description

Juniper QDD-4X100G-LR  Compatible 400G QSFP-DD PLR4 Transceiver | PAM4 1310nm 10km MPO OS2 SMF | HYTOPTODEVICE


Product Overview

HYTOPTODEVICE 400G QSFP-DD PLR4 serves as a direct drop-in replacement for Juniper QDD-4X100G-LR. It is fully tuned for Junos powered switching environments.
This PAM4 parallel single-mode transceiver supports 10km transmission at 1310nm over standard OS2 single-mode ribbon fiber. It uses four independent 100G optical lanes and MPO-12 APC interface. No CWDM multiplexing is required.
Every unit comes with custom Juniper-matched EEPROM coding. It enables plug-and-play operation without unsupported transceiver alerts. Integrated hardware RS-FEC and real-time DDM simplify daily network maintenance. This optic is widely supplied for bulk wholesale projects, 400G core trunking, 4×100G breakout and staged 100G to 400G upgrades.


Key Technical Specifications


Juniper Compatible    QDD-4X100G-LR   Vendor Name HYTOPTODEVICE
Form Factor QSFP-DD Max Data Rate 425Gbps
Wavelength 1310nm Max Distance 10km
Modulation Format PAM4 Host Required FEC
Connector MPO-12/APC Voltage Supply 3.3V
Cable Type SMF DDM Support Yes
Transmitter Type  EML Receiver Type PIN
TX Power -1.4~+4.5dBm Receiver Sensitivity < -9.1dBm
Operation Temperature 0 to 70°C (32 to 158°F) Maximum Power < 12W
Protocols QSFP-DD MSA HW Rev 5.1, QSFP-DD, CMIS Rev 5.0,  Application 400G Ethernet, Data Center Interconnect, Infiniband Interconnects
IEEE 802.3cu, IEEE 802.3bs

Usage Guidelines & Best Practices

• Fiber Rule: Only MPO-12 Type-B APC OS2 single ribbon fiber is allowed; multimode/UPC cables cannot support 10km reach.

• Lane Polarity: Confirm MPO fiber sequence before powering ports to avoid severe four-lane power imbalance.

• Distance Limit: Stable 10km performance only guaranteed within MSA rated optical budget.

• Maintenance Tip: Clean MPO APC end faces quarterly to reduce long-distance signal attenuation.

• Operating Env: Standard model 0°C–70°C indoor campus; industrial -40~85°C version available on request.


Full Compatibility List & Supported Network Hardware

1. Supported Hardware & Firmware

HYTOPTODEVICE 400G PLR4 compatible modules match original mechanical size, optical parameters and register settings. Custom Junos EEPROM removes third-party transceiver warnings and port lock risks. Every batch runs real Juniper hardware testing to avoid lane imbalance, signal skew and unstable links over 10km fiber.
Validated Juniper Switch Platforms:
• QFX5130 Leaf Switches
• QFX5220 Spine Switches
• QFX10008 Modular Core Switches
• Juniper QSFP-DD Equipped Rack Servers and SmartNIC Adapters

2. Multi-Brand Cross Compatibility

This 400G PLR4 follows open QSFP-DD MSA standards. It operates reliably on Juniper, Cisco, Aruba, Dell, Huawei, H3C and NVIDIA/Mellanox equipment. It fits multi-vendor hybrid fabrics, cross-pod interconnections and structured cabling upgrade projects.

3. Free Value-Added Services

HYTOPTODEVICE offers competitive bulk pricing for resellers, system integrators and data center contractors. We provide free Junos-compatible EEPROM reprogramming for all bulk orders.
Available options include private label printing, custom packaging and deployment consulting. All modules pass optical calibration, temperature cycling and 72-hour full-traffic burn-in. Large-volume orders enjoy tiered discounts to reduce project CAPEX.

Primary Application Scenarios

• 10km cross-building backbone trunking for Juniper leaf-spine data center fabrics
• Phased 100G to 400G network upgrades with mixed-speed infrastructure
• 400G to 4×100G breakout port expansion for Juniper TOR and core switches
• Enterprise MPO structured cabling long-distance transmission
• Wholesale supply for system integrators and global network resellers
• Multi-vendor hybrid data center 400G parallel single-mode interconnections

Connectivity Solutions(Applications)

1. 400G to 400G for Switch-Switch Interconnection
Deploy solid 400G trunk links between Juniper core and aggregation switches. The four-lane PLR4 design preserves clean signals across full 10km OS2 fiber. It supports heavy east-west data traffic and simplifies high-density MPO ribbon cabling.

400G PLR4 QSFP-DD for 400G to 400G switch-to-switch interconnection

2.400G to 4x 100G for Switch-Switch

This QDD-4X100G-LR compatible PLR4 supports native breakout mode. It splits one 400G QSFP-DD port into four independent 100G channels. It connects new 400G Juniper hardware with existing 100G switches and NICs, improving port ROI during network upgrades.

400G QSFP-DD PLR4 supporting 400G to 4x100G switch breakout links

3.400G Structured Cabling Deployment

The 1310nm parallel design integrates with standard enterprise MPO cabling systems. It works with centralized fiber frames and supports multi-floor, multi-building scaling. Unified optical specs lower ongoing maintenance and leave room for future 800G migration.

HYTOPTODEVICE 400G PLR4 for enterprise campus MPO structured cabling layout


The Core Feature 

1.Flexible Dual-Mode Operation for Staged Upgrades

This Juniper QDD-4X100G-LR PLR4 runs in two modes: full 400G or 4×100G breakout. Operators can upgrade section by section without full hardware refresh. It connects new 400G equipment and legacy 100G infrastructure, cutting capital spend and downtime.

Upgrade your network one site at a time with HYTOPTODEVICE 400G PLR4 compatible Juniper QDD-4X100G-LR



2.
Verified Host Interoperability

All HYTOPTODEVICE 400G PLR4 modules are tested on Junos and other major switch OS platforms. Preloaded EEPROM prevents compatibility errors and unauthorized transceiver logs. Multi-firmware testing delivers stable plug-and-play performance for wholesale clients.
HYTOPTODEVICE 400G PLR4 tested in host devices for proven interoperability

3.Rigorous Testing, Uncompromising Reliability

Every batch undergoes 10km fiber simulation, thermal cycling and 72-hour full-traffic aging. Precision four-lane power calibration reduces imbalance on long MPO cables. Built-in DDM enables remote diagnostics, supporting stable backbone operation for data center and campus networks.

Full factory calibration & 72h aging test for production-grade PLR4 QSFP-DD



FAQ

Q1: Are QSFP-DD transceivers compatible with traditional QSFP28 switch ports?
A: No cross-compatibility for QSFP-DD modules on QSFP28 ports. Only reverse compatibility is supported: QSFP-DD switch ports can run QSFP28 modules. QSFP28 hardware lacks complete electrical contact pins required for 400G signaling, so PLR4 QSFP-DD modules cannot establish links on QSFP28 ports.

Q2: Is the 400G PLR4 specification a standardized industry protocol?
A: Yes, 400GBASE-PLR4 is a formal and standardized optical interface. It is officially defined in the IEEE 802.3cu standard, covering 10km 1310nm parallel single-mode transmission. Meanwhile, it complies with QSFP-DD and 100G Lambda MSA specifications, ensuring universal industry interoperability.

Q3: Can 400G PLR4 and 400G XDR4 optical modules interconnect normally?
A: The two modules cannot work with each other stably. PLR4 is designed for 10km long-distance transmission with loose optical loss budget. XDR4 is a 2km short-reach specification with strict receiving sensitivity requirements. Parameter mismatches will lead to excessive bit errors and complete link failure.

Q4: What laser component is equipped on this 10km 400G PLR4 transceiver?
A: This 400G PLR4 module adopts professional 1310nm EML electro-absorption modulated laser. The component features low signal noise and stable PAM4 signal output. It fully meets IEEE long-reach optical standards and guarantees reliable and error-free 10km single-mode transmission.

Q5: Are optical attenuators required for short-range testing under 1km?
A: Attenuators are highly recommended for sub-1km testing scenarios. Ultra-short fiber links produce negligible signal attenuation. Excessive incoming optical power will oversaturate the receiver chip, causing signal distortion, increased error codes and unstable port jitter during laboratory debugging.

Q6: Which fiber cores are activated for transmission on a 12-core MPO cable with PLR4 modules?
A: The 400G PLR4 solution only utilizes the middle 8 fiber cores (3#–10#) of a standard 12-core MPO-12 APC ribbon cable. The outermost four fiber cores are reserved and not involved in data transmission, conforming to unified 400G parallel optical wiring norms.

Q7: What breakout cable specification is needed to connect PLR4 to 100G equipment?
A: It is necessary to deploy OS2 single-mode MPO-12 APC to 4×LC duplex breakout cables with Type-B polarity. This cable can split the 4-lane 400G parallel optical signal into four independent 100G-LR channels, realizing seamless docking with traditional 100G switches and network cards.

Q8: How do cascaded patch panel connections affect the 10km transmission range?
A: Each patch panel connector docking and fiber splice will generate tiny insertion loss. Multiple cascaded connections will continuously consume the module’s optical power budget. In complex cabling environments, the actual stable transmission distance will shrink to 6–8km from the standard 10km.

Q9: How to avoid module overheating throttling and damage in high-density switch deployment?
A: Ensure unobstructed front-to-back airflow inside the cabinet and keep module heat sinks clean. Maintain the ambient operating temperature within 0°C–70°C, enable automatic fan speed adjustment, and avoid full-density overloading. Reserved thermal margin can effectively prevent overheating throttling and permanent module failure.

Q10: What are the differences between Type 1 and Type 2 QSFP-DD heat sinks for PLR4 modules?
A: Type 1 is a standard-height heat sink, suitable for conventional density switch deployment scenarios. Type 2 is a low-profile slim heat sink, specially designed for ultra-high-density line cards. Both adapt to 400G PLR4 modules, and Type 2 optimizes inter-module airflow to improve overall cabinet heat dissipation efficiency.

Q11: Does this 400G PLR4 transceiver support real-time optical digital monitoring?
A: Yes, all HYTOPTODEVICE 400G PLR4 modules support complete DDM/DOM digital optical monitoring. The system can real-time monitor core data including transceiver temperature, working voltage, bias current, and transmit/receive optical power, supporting remote operation maintenance and early fault warning.

Q12: What is CMIS, and why does version matching matter for 400G QSFP-DD modules?
A: CMIS is a unified general management interface specification for QSFP-DD optical transceivers. Different CMIS versions have distinct register definitions and diagnostic logic. Version mismatch between module and switch system will cause identification failure, missing monitoring data and port initialization exceptions on Junos and other mainstream platforms.

Why Network Engineers Choose HYTOPTODEVICE

HYTOPTODEVICE has supplied over 5000,000 optical transceiver modules to data centers, ISPs, and enterprise networks across 100+ countries since 2011. Every module undergoes a 72-hour burn-in test and full DDM/DOM validation before shipment.
  • Up to 70% cost savings vs OEM, transparent pricing & flexible bulk rates, supported quality returns
  • 100% real-device compatible with Cisco, Huawei,Dell,Juniper, and Arista
  • ISO 9001:2015 Shenzhen factory, full lineup: 1.25G/10G/25G/40G/100G/200G/400G/800G/1.6T transceivers
  • Ample stock, fast global DHL/FedEx shipping in 3–5 working days
  • Free pre-sales engineering support for custom EEPROM  & private label firmware
  • Real switch test videos available for pre-purchase review; inspection & shipping videos provided per order

“Phenomenal performance. We deployed 200 HYTOPTODEVICE SFP modules to replace Cisco OEMs in our backbone network. Result? Zero compatibility issues and a 60% reduction in costs. Highly recommended for mission-critical networks."— Senior Network Engineer, Regional Telecom, Australia


Quality Certification & Compliance

 At HYTOPTODEVICE, our quality commitment is backed by industry-standard validations. From fiber optical transceiver manufacturing to final visual inspection, from IQC、IPQC、FQC to OQC, our processes ensure global compliance and reliability.

We adhere to rigorous standards for our SFP modules and network solutions:

  • ISO 9001: Certified quality management and production consistency.

  • CE & FCC: Fully compliant for seamless Global Market Access.

  • RoHS: Committed to environmental responsibility and hazardous material control.

  • Proven Reliability: Rigorous testing to reduce compliance risk and ensure safety.

Certified Quality. Global Standards. Guaranteed Performance.




Rigorous Industrial Product Testing

   hytoptodevice check device and equiptment for optical transceiver module

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  • HYTOPTODEVICE Juniper QDD-4X100G-LR compatible 400G QSFP-DD PLR4 PAM4 1310nm 10km MPO OS2 fiber bulk wholesale
  • Low power high density 400G PLR4 transceiver for Juniper data center bulk deployment
  • Juniper compatible Plug and play  zero-warning 400G QSFP-DD PLR4 for wholesale clients
  • hytoptodevice qsfp-dd 400g optical transceiver module 1310NM 10km PLR4 MPO SMF from hytoptodevice

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