| NO. | Brand | Compatible P/N | Transceiver Type |
| 1 | Cisco | WSP-Q40GLR4L | QSFP-40G-SR4(Cisco) |
| 2 | Arista Networks | QSFP-40G-LRL4 | QSFP-40G-SR4(Dell) |
| 3 | Brocade | 40G-QSFP-LR4L | QSFP-40G-SR4(Huawei) |
| 4 | EdgeCore | ET6401-IR4 | QSFP-40G-CSR4 |
| 5 | H3C | QSFP-40G-LR4L-WDM1300 | QSFP-40G-LG4 |
| 6 | HPE H3C | JL286A | QSFP-40G-ER4 |
| 7 | Huawei | QSFP-40G-LR4-Lite | QSFP-40G-ZR4 |
| 8 | Juniper | JNP-QSFP-40GE-IR4 | |
| 9 | NVIDIA(Mellanox) | MC2210511-IR4 | |
| 10 | Palo Alto Networks | PAN-QSFP-40GBASE-LM4 |
| Cisco Compatible | WSP-Q40GLR4L | Vendor Name | HYTOPTODEVICE |
| Form Factor | QSFP+ | Max Data Rate | 41.2Gbps (4x 10.3Gbps) |
| Wavelength | 1310nm | Max Distance | 2km |
| Connector | Duplex LC | Transmitter Type | DFB CWDM |
| Cable Type | SMF | Receiver Type | PIN |
| TX Power | -7.0~2.3dBm | Receiver Sensitivity | < -11.5dBm |
| Power Consumption | ≤3.5W | Modulation | NRZ |
| Protocols | 40G Ethernet, Fibre Channel, SATA/SAS3, MSA Compliant | Operation Temperature | 0 to 70°C (32 to 158°F) |
Usage Guidelines & Best Practices
Fiber Choice: Works only with OS2 single-mode fiber. Multimode fiber is not compatible with this 1310nm CWDM4 module.
Distance Specification:Max 2km (OS2 SMF). Dirty end faces, excessive splicing and sharp bending reduce actual transmission distance.
Cleanliness & Dust: Keep dust caps on whenever unattached. Clean fiber end-faces with a optical cleaning pen before insertion; dust causes over 80% of optical link failures.
Installation Specification: Hot-swap supported. Follow ESD anti-static procedures and keep LC connectors clean for stable links.
Operating Environment: 0°C–70°C commercial temperature range. Ensure cabinet ventilation to avoid optical power attenuation from overheating.
Full Compatibility List and Supported Devices
1. Supported Hardware & Firmware
Pre-calibrated Cisco dedicated EEPROM ensures plug-and-play recognition and avoids port rejection and link instability. All stocked modules pass real machine burn-in and temperature cycling tests for mainstream Cisco data center switches and routers.
Validated Platforms:
Primary Application Scenarios
1. 40G QSFP+ Connectivity for High-Density Data Centers
Speed without the overhead. The QSFP+ 40G transceiver delivers full 40G throughput into dense data center racks — while drawing less power and occupying less space than you'd expect.
FAQ
Q1: Can wholesalers buy this 40GBASE-LR4L optic and deploy it on a 100G QSFP28 Cisco switch port with speed downgrade?
A: Often yes, if the port can be configured down to 40G speed. Support varies by platform, so verify the port's speed capability with your switch vendor before purchasing from the manufacturer supplier.
Q2: Can distributors pair HYTOPTODEVICE compatible 40G LR4L optics with original Cisco OEM transceivers on the same fiber link?
A: In most cases yes — 40GBASE-LR4L links are standardized, so any two compliant modules interoperate regardless of brand, as long as both ends use single-mode fiber and correct duplex LC cable.
Q3: Do custom buyers need a firmware upgrade on Cisco switches to detect this WSP-Q40GLR4L replacement transceiver for network projects?
A: Many switches recognize standards-compliant modules without upgrades. Some OEM platforms need a minor firmware update or feature license to accept non-OEM optics — check your switch release notes.
Q4: What maximum transmission distance can purchasers get when ordering this Cisco WSP-Q40GLR4L compatible module directly from manufacturer?
A: Per IEEE standard, 40GBASE-LR4L reaches 2 km on OS2 single-mode fiber. Longer runs require full 40GBASE-LR4 10km modules.
Q5: What wavelength scheme and lane design does this custom 40G LR4L CWDM4 transceiver adopt for campus network builds?
A: 1310nm CWDM4, operating as 4 independent 10G lanes multiplexed together for a total of 40 Gbps.
Q6: What power consumption should wholesalers and distributors expect for bulk ordered 40GBASE-LR4L transceivers from our factory?
A: Typical max power consumption is 3.5W per module, complying with MSA specs and safe for dense QSFP+ line card deployment.
Q7: Can network contractors hot swap this Cisco compatible in-stock transceiver without powering off switches during site deployment?
A: Yes, QSFP+ modules are hot-pluggable; you can install or replace them without powering down the switch, following normal ESD precautions.
Q8: What impact will unclean LC fiber connectors bring to 40GBASE-LR4L single-mode links in your wholesale network project?
A: Critical. Dust or contamination on LC ferrules causes high insertion loss, link instability and bit errors. Inspect and clean LC connectors before every installation.
Q9: Is it acceptable for custom buyers to use mixed grades of single-mode fiber within one single 40GBASE-LR4L link for on-site deployment?
A: Yes, but the maximum reach will be limited by the fiber quality of the weaker segment. Stick to OS2 single-mode fiber to guarantee full 2km performance.
Q10: What warranty and RMA service can wholesalers, distributors and custom clients get for bulk orders with our manufacturer supplier?
A: We offer 5 years warranty with a simple RMA process: report the issue, return the module, and receive a replacement or credit. Confirm the policy in writing.
Q11: How will HYTOPTODEVICE handle DOA defective units for spot stock and wholesale bulk purchases from distributors and wholesalers?
A: HYTOPTODEVICE replaces DOA units free of charge within 30 days. Keep the packaging and test evidence for a fast RMA.
Q12: What is the correct installation workflow for Cisco 40GBASE-LR4L transceivers during field deployment for distributor network projects?
A: Align the module with the port keyway, insert gently until seated, and latch it. Do not force it; misaligned insertion can bend pins and damage both module and port.
Q13: What steps should buyers take to troubleshoot a downed fiber link right after module purchase and installation?
A: Check in order: module seating and latching, LC connector cleanliness, fiber type (OS2 SMF), link partner speed, and DOM readings (TX power should be present; RX power within sensitivity range).
Q14: Can wholesalers and distributors obtain datasheets and professional technical support from HYTOPTODEVICE manufacturer before placing bulk orders?
A: Yes — datasheets, compatibility lists, quick-install guides, and test reports are provided, plus pre- and post-sale technical support by email or chat to help with deployment issues.
Q15: Are there import, export or certification limitations when distributors and wholesalers order large quantities of these 40G single-mode optical modules?
A: 40G LR4L modules are widely available internationally and typically not subject to strict export licensing, but confirm import duties, RoHS requirements, and any local telecom certifications for your destination before ordering.
Packaging & Custom OEM Solutions
Every 40G QSFP+ SR4 module ships in sealed ESD-safe packaging, ready for same-day dispatch. Bulk orders offer OEM customization—logo printing and private labeling—tailored for network distributors, integrators, and enterprise deployments.
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.
“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.
