| NO. | Brand | Compatible P/N | Transceiver Type |
| 1 | Cisco | QSFP-40G-SR4-S | QSFP-40G-SR4(Dell) |
| 2 | APRESIA | H-SR4-QSFP+ | QSFP-40G-SR4(Huawei) |
| 3 | Alcatel-Lucent | QSFP-40G-SR | QSFP-40G-IR4 |
| 4 | Arista Networks | QSFP-40G-SR4 | QSFP-40G-LG4 |
| 5 | Brocade | 40G-QSFP-SR4-INT | QSFP-40G-ER4 |
| 6 | Check Point | CPAC-TR-40SR-SSM160-QSFP | QSFP-40G-ZR4 |
| 7 | Cisco Meraki | MA-QSFP-40G-SR4 | QSFP-40G-CSR4 |
| 8 | D-Link | DEM-QX01Q-SR4 |
| D-Link Compatible | DEM-QX01Q-SR4 | Vendor Name | HYTOPTODEVICE |
| Form Factor | QSFP+ | Max Data Rate | 41.25Gbps |
| Wavelength | 850nm | Max Distance | 150m@OM4/100m@OM3 |
| Connector | MTP/MPO | Transmitter Type | VCSEL 850nm |
| Cable Type | MMF | Receiver Type | PIN |
| TX Power | -8.0~1.0dBm | Receiver Sensitivity | < -13dBm |
| Power Consumption | ≤1.5W | Modulation | NRZ |
| Protocols | IEEE 802.3 40GBASE-SR4, SFF-8436 | Operation Temperature | 0 to 70°C (32 to 158°F) |
Usage Guidelines & Best Practices
Fiber Choice: Only works with OM3 / OM4 multi‑mode MPO‑12 trunk cable; single‑mode fiber cannot support 850nm SR4 transmission and will lead to link failure.
Distance Limit: Max 100m on OM3 MMF, max 150m on OM4 MMF; excessive splices, dirty end‑faces or sharp bends reduce actual working 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‑plug supported; keep MPO connector end‑faces clean, observe minimum fiber‑bend radius requirements.
Operating Environment: Commercial temperature range 0°C‑70°C; maintain cabinet airflow to avoid module overheating.
Full Compatibility List and Supported Devices
1. Supported Hardware & Firmware
Primary Application Scenarios
• Intra‑data‑center short‑haul leaf‑spine fabric links built on D‑Link switching hardware
• 40G aggregation‑layer trunk expansion for large enterprise Meraki managed campus networks
• Top‑of‑Rack switch 40G uplinks towards compute and virtualisation server farms
• Rack‑to‑rack short‑range multi‑mode fiber connections within Meraki‑managed server halls
• Enterprise and service‑provider infrastructure refresh and Meraki cloud network modernisation initiatives
• Multi‑vendor hybrid‑fabric deployments for cloud‑managed workload environments
1. 40G Connectivity for Data Center
High speed, low overhead. The QSFP+ 40G transceiver brings gigabit-class throughput to dense data center racks while drawing less power and taking up less space.
FAQ
Q1: How do I resolve unsupported transceiver warning after installing HYTOPTODEVICE QSFP+ 40G SR4 on D‑Link switches? A: This usually means the module's coding does not match the switch's vendor lock. Genuine‑compatible HYTOPTODEVICE modules include the right coding; if the message persists, check the port configuration, update firmware, or contact us for a recode.
Q2: Can HYTOPTODEVICE 40G SR4 transceiver work with my existing 10G SFP+ hardware for phased D‑Link network migration? A: Yes, with a breakout solution: the 40G SR4 can be split into 4×10G links using an MPO‑to‑4×LC breakout cable connected to SFP+ ports, letting you migrate gradually.
Q3: Which fiber types are mandatory when deploying HYTOPTODEVICE D‑Link‑compatible QSFP+ 40G SR4 transceivers? A: Multimode fiber only — OM3 or OM4 (OM5 also supported on some platforms). It will not work on single‑mode fiber; that requires a 40G LR4 module.
Q4: What power draw should I plan for HYTOPTODEVICE QSFP+ 40G SR4 inside densely populated D‑Link switch racks? A: Typically around 1.0–1.5 W per module, depending on vendor and temperature — far lower than the MSA maximum, so it is safe for dense switch line cards.
Q5: What insertion loss and link‑budget values need consideration for HYTOPTODEVICE 40G SR4 deployment in D‑Link fiber plant? A: The 40GBASE‑SR4 channel supports a maximum insertion loss of about 1.9 dB (including connectors and patch panels). Confirm your cable plant loss before deployment.
Q6: Will using HYTOPTODEVICE 40G SR4 limit future upgrade projects to 100G speeds on D‑Link infrastructure? A: It is a 40G product; the fiber (OM3/OM4) can often be reused for 100G SR4/SR10, but the module and ports must be upgraded. Plan cabling with future capacity in mind.
Q7: Is my current on‑site MPO trunk cabling reusable for HYTOPTODEVICE QSFP+ 40G SR4 in D‑Link network projects? A: Check the fiber count, connector polish (UPC), and polarity. Existing 12‑fiber MPO trunks are often reusable, but verify loss and polarity against SR4 requirements.
Q8: What performance impact occurs if mixing OM3 and OM4 multimode fiber in one link with HYTOPTODEVICE 40G SR4 modules? A: Yes, but the reach is limited by the shorter‑grade segment (OM3), so a mixed link is rated at 100 m maximum.
Q9: What compliance documents are available for HYTOPTODEVICE bulk‑procured QSFP+ 40G SR4 optical modules? A: Typical certifications include CE, FCC, RoHS, and REACH compliance; some suppliers also hold ISO 9001. Ask for certificates before ordering.
Q10: Are HYTOPTODEVICE QSFP+ 40G SR4 modules protected against ESD risk during shipping and on‑site handling for D‑Link deployments? A: Yes — they ship in anti‑static packaging and are designed for hot‑swap with ESD protection. Always ground yourself before handling.
Q11: What stock availability and lead‑time can I expect for HYTOPTODEVICE D‑Link‑compatible QSFP+ 40G SR4 bulk orders? A: Popular models (Cisco/Arista/Juniper‑compatible 40G SR4) are usually in stock with 24–72 h dispatch; custom‑coded or industrial versions may take 1–3 weeks.
Q12: What payment terms and Incoterm options does HYTOPTODEVICE support for cross‑border wholesale QSFP+ 40G SR4 procurement? A: Typical terms: T/T, PayPal, or trade assurance for smaller orders; FOB, CIF, or DDP for freight. Confirm total landed cost (shipping, duties, taxes) before finalizing.
Q13: Are there potential hidden import‑related costs when buying HYTOPTODEVICE QSFP+ 40G SR4 for international D‑Link network projects? A: Duties and taxes vary by destination and Incoterm. Ask the supplier to quote DDP if you want a fixed, all‑inclusive delivered price with no surprises at customs.
Q14: How to retrieve real‑time optical diagnostic data from HYTOPTODEVICE QSFP+ 40G SR4 on D‑Link managed switches? A: Use the switch CLI (e.g., show interface transceiver or show optics) to view per‑lane temperature, voltage, TX/RX power, and alarms — the data comes from the module's standard DOM.
Q15: Is investing in 40G SR4 still reasonable while industry transitions toward 100G/400G for D‑Link‑based enterprise environments? A: For existing 40G networks it remains fully supported and cost‑effective; your multimode cabling can often be reused later. Choose suppliers with long‑term availability so you can restock for years
Packaging & Custom OEM Solutions
Each QSFP+ SR4 module is individually sealed in ESD-safe anti-static packaging and stocked for same-day dispatch. Bulk orders can also be customized with OEM packaging—logo printing and private labeling included—built for network distributors, system 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.
