Q1. What is an OSFP‑400G‑SR4 Flat Top module?
A: The OSFP‑400G‑SR4 Flat Top is an OSFP form‑factor transceiver supporting 400 Gbps Ethernet over OM4 multimode fiber, using 4 parallel 100 Gbps PAM4 lanes and cooled via a flat-top housing designed to ride on host heatsinks.
Q2. What is the maximum supported transmission distance?
A: Up to 30 m over OM3 and 50 m over OM4, when host-side FEC is enabled.
Q3. What connector and fiber type does it use?
A: Uses a single MPO‑12/APC connector over 50/125 µm multimode fiber (OM3/OM4).
Q4. Is the module compatible across different vendor equipment?
A: Yes. It is OSFP MSA‑compliant and broadly compatible with OSFP-enabled switches and host cards (e.g., NVIDIA ConnectX‑7, Spectrum‑4), across brands supporting generic optics.
Q5. Does OSFP‑400G‑SR4 support hot‑swapping?
A: Yes—it is a hot‑pluggable module, allowing insertion/removal without shutting down the host device.
Q6. Does it support lane breakout to lower rates?
A: Yes—through use of 1:2 splitter or breakout cables, it can operate in 200 Gb/s mode (activating 2 lanes), reducing power consumption accordingly.
Q7. Does it support diagnostic monitoring (DDM/DOM)?
A: Yes. It supports CMIS/OSFP MSA diagnostics over I²C for optical power, temperature, voltage, and status.
Q8. What is the aggregate and per-lane data rate?
A: Supports up to 425 Gbps aggregate, with four lanes of 106.25 Gbps PAM4 (electrical 400GAUI‑4).
Q9. What is the typical power consumption?
A: Typically <8 W, up to 9 W maximum in full 400G mode; drops to ~5–6.5 W when operating at 200G (2 channels).
Q10. What operating temperature range is supported?
A: Standard case temperature range: 0 °C to +70 °C; commercial-grade only.
Q11. Which standards does it comply with?
A: Complies with IEEE 802.3bs (400GBASE‑SR4) and OSFP MSA, and supports PAM4, 400GAUI‑4, and CMIS (v4.0) protocols.
Q12. How to verify compatibility with equipment?
A: Confirm host supports OSFP optics, CMIS-based modules, and generic flat‑top variants (e.g. NVIDIA MMA4Z00‑NS400 compatibility). Compatibility testing with major vendors is common.
Q13. What are common use cases for this module?
A: Used for 400 GbE server-to-switch or NIC-to-switch links within high-density data centers (e.g., NVIDIA ConnectX‑7, Spectrum‑4) over multimode fiber.
Q14. What are typical transmitter/receiver specifications?
A: Typical Tx power per lane: –4.6 to +4.0 dBm; receiver sensitivity ~< –4.6 dBm. Electro‑optical link budget supports reliable OM4 link.
Q15. Are flat‑top industrial or extended‑temperature variants available?
A: Generally standard commercial spec only. Extended-temperature or industrial-grade versions may be offered by some vendors but are less common for flat‑top modules.