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The FS QSFP112-LR4-400G Compatible LINK-PP module is a high-performance 400G QSFP112 optical transceiver compliant with QSFP112 MSA V2.0, CMIS 5.1, and 400GAUI-4 standards. Operating on a single 3.3V power supply with under 10W power consumption, it utilizes 4x100G PAM4 modulation, high-precision EML lasers, and PIN receivers to deliver exceptional 400Gbps transmission over single-mode fiber infrastructure reliably.
| FS Part Number | QSFP112-LR4-400G | Vendor Name | LINK-PP |
| Form Factor | QSFP112 | Max Data Rate | 425Gbps (4x 106.25Gbps) |
| Wavelength | 1271nm, 1291nm, 1311nm, 1331nm | Max Cable Distance | 10km |
| Connector | Duplex LC | Media | SMF |
| Transmitter Type | EML | Receiver Type | PIN |
| DDM/DOM | Supported | Operating Temperature Range | 0°C to +70°C |
| Protocols | QSFP-112 MSA, CMIS Rev 5.2, 100G Lambda MSA-400GBASE-LR4-10, OIF-CEI-112G-VSR-PAM4 | Warranty | 5 Years |
Engineered for next-generation networks, the FS QSFP112-LR4-400G Compatible LINK-PP 400G QSFP112 transceiver features low 10W maximum power consumption, a standard duplex LC connector, and 4-lane CWDM multiplexing. It offers 400G-LR4-10 compliance, commercial operating temperature range from 0°C to 70°C, and comprehensive digital diagnostic monitoring capabilities.
The FS QSFP112-LR4-400G Compatible LINK-PP optical module integrates advanced 4x100Gb/s PAM4 retimer architecture with an integrated EML TOSA and PIN ROSA, delivering superior 400Gb/s aggregate bandwidth and reliable signal integrity for hyperscale computing.
Optimized for high-throughput telecommunication environments, the QSFP112-LR4-400G module delivers ultra-low latency and ultra-high bandwidth 400G interconnectivity for modern 5G mid-haul, backhaul networks, enterprise campus backbones, and next-generation cloud edge computing infrastructures.
By utilizing four-channel CWDM optical multiplexing and de-multiplexing design, the QSFP112-LR4-400G module merges four 100G lanes into one duplex fiber pair, significantly maximizing existing dark fiber capacity while minimizing costly cabling deployment expenses.
The QSFP112-LR4-400G module operates across four standardized CWDM grid central wavelengths-1271nm, 1291nm, 1311nm, and 1331nm. This precise 20nm channel spacing ensures minimal optical crosstalk, superior side-mode suppression ratio, and optimal transmission stability.
With built-in host FEC support and an optimized optical link budget, the QSFP112-LR4-400G transceiver enables long-reach data transmission up to 10 kilometers over standard G.652 single-mode fiber (SMF), perfect for inter-datacenter links.
Equipped with an industry-standard duplex LC optical receptacle, the QSFP112-LR4-400G module allows seamless connection with existing patch cords and distribution frames, facilitating effortless installation, secure latching, and reduced maintenance in high-density networking racks.
Featuring comprehensive Digital Optical Monitoring (DOM) compliant with CMIS 5.1, the QSFP112-LR4-400G transceiver provides real-time diagnostics for operating temperature, supply voltage, laser bias currents, and transmitted/received optical power levels, ensuring proactive network troubleshooting.
The FS QSFP112-LR4-400G Compatible LINK-PP 400G QSFP112 module complies with strict global regulatory standards, ensuring industry-grade environmental safety, electro-magnetic compatibility, robust operational reliability, and dependable commercial network deployment.
Every QSFP112-LR4-400G unit undergoes an intensive multi-stage quality assurance protocol, verifying signal integrity, optical parameters, and electrical performance to eliminate field failure risks before shipment.
Fully certified with CE, FCC, UKCA, UL, REACH, and RoHS 2.0, the QSFP112-LR4-400G transceiver satisfies international electrical safety directives and hazardous material environmental compliance benchmarks worldwide.
Engineered with broad CMIS 5.1 firmware interoperability, the QSFP112-LR4-400G module guarantees seamless plug-and-play compatibility across leading mainstream 400G data center switches, routers, and network interface cards.
LINK-PP enforces comprehensive multi-parameter lab testing for every QSFP112 module to ensure top-tier performance, low latency, and zero data packet loss.
Evaluates central wavelength precision and side-mode suppression ratio across all 4 CWDM channels.
Measures PAM4 TDECQ metrics and transmitter eye closure to ensure optimal signal fidelity.
Verifies pre-FEC error rate thresholds to ensure flawless, error-free 400G data transmission under load.
Validates optical stability across commercial temperature operating conditions from 0°C to 70°C.
LINK-PP provides secure, standardized packaging and expedited global shipping solutions to guarantee safe delivery of every QSFP112-LR4-400G 400G QSFP112 optical transceiver.
Enclosed in specialized ESD-safe clamshell trays to prevent electrostatic damage during handling.
Cushioned by impact-absorbing outer cartons to safeguard delicate optical connectors in transit.
Streamlined warehouse logistics ensure prompt order fulfillment and fast worldwide dispatch.
Shipped globally via premium international couriers with complete end-to-end tracking support.
Deploying the FS QSFP112-LR4-400G Compatible LINK-PP module is straightforward: hot-plug the transceiver into any QSFP112 port, insert duplex LC single-mode fiber cables, and verify link initialization and real-time telemetry via the host switch’s CMIS 5.1 CLI interface.
LINK-PP provides professional technical support, including pre-sales consultation, compatibility verification, and post-deployment troubleshooting to ensure smooth network operation.
Professional technical guidance to help customers select the most suitable QSFP112-LR4-400G modules based on network architecture and application requirements.
Compatibility checks and validation to ensure seamless operation with Cisco switches and other supported networking platforms.
Step-by-step support for installation, configuration, and initial deployment to ensure stable and correct operation.
Ongoing technical support throughout the product lifecycle to ensure reliable performance in enterprise and carrier-grade networks.
LINK-PP provides after-sales support for the smooth deployment and reliable operation of the optical modules.
15-day no-reason return and refund
Free replacement for dead-on-arrival (DOA) or defective items within the initial period
Free repair services for manufacturing defects throughout the warranty period
Warranty exclusions and conditions apply
![]() Current Model QSFP112-LR4-400G |
|---|
Compatible | FS | FS |
Data Rate (Max) | 425Gbps (4x 106.25Gbps) | 425Gbps (4x106.25Gbps) |
Wavelength | 1271nm, 1291nm, 1311nm, 1331nm | 1271nm, 1291nm, 1311nm, 1331nm |
Connector | Duplex LC | Duplex LC |
Cable Distance (Max) | 10km | 2km |
Cable Type | SMF | SMF |
Operating Temperature | 0°C to +70°C | 0°C to +70°C |
Vendor Name | LINK-PP | LINK-PP |
Form Factor | QSFP112 | QSFP112 |
Transmitter Type | EML | EML |
Receiver Type | PIN | TIA |
DDM/DOM | Supported | Supported |
Protocols | QSFP-112 MSA, CMIS Rev 5.2, 100G Lambda MSA-400GBASE-LR4-10, OIF-CEI-112G-VSR-PAM4 | QSFP-112 MSA, CMIS Rev 4.0, IEEE 802.3cu, OIF-CEI-112G-VSR-PAM4 |
Warranty | 5 Years | 5 Years |
| Pictures | ID# | Description | Price | Stock | Add to Cart |
Q: Hey, we're planning a massive 400G upgrade. Are these LQ-CW400-LR4C QSFP112 modules fully compatible with our existing Juniper and Cisco switches out of the box? By A***s on 2026-06-01
A: Absolutely! The LQ-CW400-LR4C is QSFP112 MSA compliant and rigorously tested for multi-vendor interoperability. They plug and play seamlessly with Juniper, Cisco, and generic networking gear without triggering any "unsupported transceiver" warnings. By admin on 2026-06-01
Q: We have strict procurement guidelines. Does this 400G SMF optical transceiver pass CE, FCC, and RoHS 2.0 regulations? By E***l on 2026-03-20
A: Yes, 100%. The module is fully certified under CE, FCC, UKCA, UL, REACH, and RoHS 2.0. It meets all global environmental safety and electro-magnetic compatibility standards required for commercial network deployments. By admin on 2026-03-21
Q: Does this require an MPO/MTP connector or just a standard Duplex LC? We're trying to reuse our existing G.652 dark fiber. By B***z on 2026-03-18
A: You can definitely reuse your existing G.652 fiber! The LQ-CW400-LR4C uses standard Duplex LC/UPC connectors and multiplexes four 100G channels (1271nm-1331nm) via CWDM4 technology over a single pair of Single-Mode Fiber (SMF) up to 10km. No costly MPO infrastructure upgrades are required. By admin on 2026-03-18
Q: The specs say the operating temperature is 0°C to 70°C. Do you manufacture an industrial-grade version (-40°C to 85°C) for extreme outdoor telecom cabinets? By S***s on 2026-02-27
A: This specific LQ-CW400-LR4C model is engineered for commercial indoor scenarios, such as climate-controlled server rooms and enterprise campuses (0°C to 70°C). However, we do manufacture custom industrial-grade optics for extreme outdoor conditions. Please contact our technical support team to spec out a specialized wide-temp 400G solution! By admin on 2026-02-27
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