Cisco QSFP-40G-LR4 Compatible QSFP+ 40G LR4 Transceiver Module | 40GBASE-LR4 1310nm(CWDM4）10km Duplex LC SMF Bulk Wholesale

• Operating Environment: 0°C–70°C commercial temperature range. Ensure cabinet ventilation to avoid optical power attenuation from overheating.

• Long-distance data center inter-site 40G uplink: Stable 10km single-mode fiber connections between separate data center buildings.
• Enterprise campus long-haul backbone links: Cross-city or multi-building campus single-mode fiber transmission up to 10km.
• 40G core aggregation uplink: TOR switch uplink to core switch for large enterprise backbone networks.
• Cisco network hardware upgrade: Direct drop-in replacement for aging QSFP-40G-LR4 40G transceivers.
• Multi-vendor hybrid network bulk deployment: Mass rollout for integrator and wholesale infrastructure projects.

2.100% Compatibility Verified. Zero-Risk Deployment.

3.No Sampling. No Shortcuts. Every Unit Tested

While others rely on batch sampling, we test every single unit. Each QSFP+ LR4 transceiver is individually verified for optical compliance and continuous operational stability before it ships — so performance isn't a gamble, it's a guarantee. See the process yourself: take a virtual tour of our Test Center.

Q1: Why does Cisco Nexus switch show unsupported transceiver alert after installing QSFP+ 40G LR4 replacement module? A: Vendor lock or EEPROM coding mismatch is the root cause. HYTOPTODEVICE pre-programs proper coding for Cisco NX-OS platforms; if the warning persists, verify port speed settings, upgrade switch firmware or contact us for module recoding service.

Q2: Can I mix HYTOPTODEVICE QSFP+ 40G LR4 third-party optic and OEM transceiver on two ends of a single-mode fiber link? A: Yes, mixed-brand transceiver deployment works reliably. Both sides only need to comply with 40GBASE-LR4 standard and use single-mode fiber, different transceiver brands will not break the optical connection.

Q3: Can Cisco compatible QSFP+ 40G LR4 transceiver split into four separate 10G ports just by adding simple breakout cable? A: Simple breakout cable cannot split this 40G LR4 signal to independent 10G ports. Unlike SR4, its four 10G lanes share one fiber pair via WDM, so CWDM mux/demux or active media converter is required for 4×10G separation.

Q4: Does HYTOPTODEVICE QSFP+ 40G LR4 transceiver support DDM DOM alarm reporting for Cisco Nexus switches? A: This LR4 module fully supports standard DDM/DOM alarm functions. It outputs per-wavelength temperature, voltage, transmit and receive power data via standard MSA registers for your Cisco switch to read.

Q5: What fiber type is required for deploying Cisco QSFP-40G-LR4 compatible QSFP+ 40G LR4 transceiver? A: This transceiver only works with standard single-mode fiber G.652 or G.657. Multimode fiber cannot support LR4 operation; multimode fiber is exclusively for SR4 optical modules.

Q6: Can my existing single-mode fiber cabling support future 100G network upgrade when deploying QSFP+ 40G LR4 transceivers? A: Your existing duplex single-mode fiber plant can be reused for later 100G LR4 migration. The same fiber cabling meets 100G LR4 requirements; you only need to upgrade switch ports and optical transceivers.

Q7: What fiber patch cable specifications match HYTOPTODEVICE QSFP+ 40G LR4 transceiver for Cisco inter-site deployment? A: You need duplex LC-LC OS2 single-mode patch or trunk cables. Both fiber ends must use LC connectors with UPC polish, which is the standard interface for this QSFP+ 40G LR4 module.

Q8: Can I reuse pre-installed single-mode trunk fiber cables for Cisco QSFP+ 40G LR4 optical links? A: Most existing single-mode trunk cables are reusable for this QSFP+ 40G LR4 link. Confirm they are duplex LC OS1/OS2 fiber and total insertion loss stays under the LR4 power budget before deployment.

Q9: How to confirm HYTOPTODEVICE QSFP+ 40G LR4 transceiver is genuine new stock for wholesale vendor orders? A: You can verify authenticity with serial traceability and factory test documentation. HYTOPTODEVICE provides 4-wavelength test reports, batch records and DOA warranty support to prove genuine new modules.

Q10: What compliance certifications are available for OEM orders of HYTOPTODEVICE Cisco compatible QSFP+ 40G LR4 transceiver modules? A: Our QSFP+ 40G LR4 transceivers carry CE, FCC, RoHS and REACH certifications under ISO9001 controlled manufacturing. Contact HYTOPTODEVICE to request certification copies before placing wholesale or OEM orders.

Q11: Will HYTOPTODEVICE QSFP+ 40G LR4 transceiver performance degrade significantly after long continuous runtime inside inter-DC racks? A: Slow per-lane aging is normal and trackable via DDM readings. Sudden performance drops are caused by fiber contamination, overheating or ESD damage rather than natural module aging.

Q12: Why is HYTOPTODEVICE QSFP+ 40G LR4 transceiver more cost-effective than original Cisco OEM optical modules for wholesale buyers? A: Our competitive pricing comes from direct factory supply without OEM brand premium and multi-layer channel markup. HYTOPTODEVICE compatible modules deliver identical performance for standard 40GBASE-LR4 fiber links.

Q13: What RMA support will I receive if my HYTOPTODEVICE QSFP+ 40G LR4 transceiver arrives DOA dead on arrival for bulk shipment? A: HYTOPTODEVICE provides free DOA replacement within 30 days of receipt. Keep original packaging and test logs ready to speed up the RMA approval and replacement process for wholesale shipments.

Q14: Can I request sample units of Cisco QSFP-40G-LR4 compatible QSFP+ 40G LR4 transceiver before confirming bulk order with low MOQ? A: HYTOPTODEVICE offers discounted or qualified samples for bulk buyers, and sample cost can be credited back on your first large order. This lets you test compatibility on Cisco switches before full OEM or wholesale deployment.

Q15: What is the proper installation procedure for QSFP+ 40G LR4 transceiver into Cisco Nexus QSFP+ port? A: Align the module keyway and insert gently then latch into the port. Never force insertion, as misalignment may scratch the module internal contacts and damage the Cisco switch port.

Q16: How to troubleshoot offline fiber link after installing HYTOPTODEVICE QSFP+ 40G LR4 transceiver on Cisco Nexus switch? A: Follow a fixed troubleshooting sequence to locate the root cause. Check module seating, LC connector cleanliness, TX/RX fiber polarity, fiber type, link distance, total insertion loss and DDM per-lane readings step by step.