Q1. What is a QSFP‑40G‑SR4 module?
A: The QSFP‑40G‑SR4 is a Quad Small Form-factor Pluggable Plus (QSFP+) transceiver designed for 40 Gbps Ethernet over multimode fiber (MMF) at 850 nm, using a 12‑fiber parallel MPO/MTP interface.
Q2. What are the supported transmission distances?
A: Supports up to 100 m on OM3 and 150 m on OM4/MMF.
Q3. What connector and fiber type does it use?
A: Uses an MTP/MPO‑12 connector over 50/125 µm multimode fiber.
Q4. Is QSFP‑40G‑SR4 compatible across various brands?
A: Yes—it's MSA‑compliant and works with Cisco, Arista, Juniper, Huawei, Dell, and other vendors that support generic QSFP+ optics. Several vendors provide pre‑programmed modules for seamless compatibility.
Q5. Does the module support hot‑swapping?
A: Yes—it’s hot‑pluggable, meaning insertion or removal doesn’t require shutting down the host system.
Q6. Does it support 4×10G breakout mode?
A: Yes—QSFP‑40G‑SR4 can operate in 4×10G breakout mode, interoperable with 10GBASE‑SR lanes, up to the same distances (100 m OM3, 150 m OM4), using MPO‑to‑duplex LC breakout cables.
Q7. Does it support diagnostic monitoring (DDM/DOM)?
A: Yes—most modules support Digital Diagnostic Monitoring (SFF‑8472), offering metrics like optical power, temperature, and voltage.
Q8. What is the typical power consumption?
A: Power consumption is under 1.5 W, commonly around 1 W depending on vendor.
Q9. What is the operating temperature range?
A: Commercial modules typically operate from 0 °C to 70 °C; extended variants support –10 °C to 85 °C or industrial spec ranges.
Q10. What standards does QSFP‑40G‑SR4 comply with?
A: Compliant with IEEE 802.3ba 40GBASE‑SR4 and QSFP+ MSA (SFF‑8436) standards.
Q11. How can I verify compatibility with my network equipment?
A: Check if your system supports generic QSFP+ 40G SR4 optics and uncoded modules. Many 3rd‑party vendors provide pre‑configured EEPROM to guarantee compatibility with major platforms.
Q12. What are typical applications for QSFP‑40G‑SR4?
A: It is ideal for data center aggregation, server‑to‑switch interconnects, spine‑leaf architectures, and backbone links over MMF.
Q13. Are there industrial temperature or extended versions available?
A: Yes—some modules, like the universally coded SR4‑X‑MSA, support –10 °C to 85 °C or beyond, with warranty coverage and broad compliance.