Q1. What is an SFP‑25G‑LR module?
A: The SFP‑25G‑LR is an SFP28 transceiver module supporting 25 Gbps Ethernet over single-mode fiber (SMF) using a 1310 nm DFB laser, designed for long-reach links up to 10 km.
Q2. What is the typical maximum transmission reach?
A: Up to 10 km over G.652 SMF. Some engineered links may push slightly beyond with low insertion loss and RS-FEC enabled.
Q3. What fiber type and connector does it use?
A: Uses duplex LC connector with 9/125 µm single-mode fiber (SMF), typically OM1/OS2.
Q4. Is SFP‑25G‑LR compatible with different brand equipment?
A: Yes. It is MSA‑compliant, compatible across major vendors (Cisco, Arista, Juniper, Huawei, etc.), assuming host supports SFP28 optics.
Q5. Is the module hot‑swappable?
A: Yes, as an SFP28 module, it supports hot-plug insertion/removal without powering down host devices.
Q6. Does it support diagnostics (DDM/DOM)?
A: Yes. It includes Digital Diagnostic Monitoring (SFF‑8472), allowing monitoring of optical tx/rx power, temperature, voltage, and more.
Q7. What data rates are supported?
A: Designed for 25 Gbps, typical range up to 28 Gb/s, with many modules also supporting 10 Gbps (10.31 Gbps) depending on host compatibility.
Q8. What is the typical power consumption?
A: Power consumption is typically ≤ 1.5 W (often ~1.2 W), depending on module vendor.
Q9. What operating temperature ranges are supported?
A: Standard modules: 0 °C to 70 °C; extended range: –5 °C to +85 °C; industrial variants may support –40 °C to +85 °C.
Q10. Which standards does it conform to?
A: Complies with IEEE 802.3cc / 25GBASE‑LR, plus MSA SFP28 standards SFF‑8402, SFF‑8431, SFF‑8472.
Q11. How to verify compatibility with my networking device?
A: Check if device supports 25GBASE‑LR optics and allows generic SFP28 modules; verify module part number or MSA support.
Q12. What applications are typical for SFP‑25G‑LR?
A: Commonly used for data center inter-rack links, server uplinks, campus backbone, ISP aggregation, and high-speed SMF interconnects.
Q13. Can SFP‑25G‑LR operate at 10 Gbps?
A: Yes—dual-rate capable modules support 10.31 Gbps, though host port support is required. Reach and diagnostics may vary accordingly.
Q14. Is RS‑FEC required for full reach at 25 G?
A: No—10 Gbps mode doesn’t need FEC; 25 Gbps mode requires RS-FEC on host ports to reliably reach 10 km.
Q15. Are industrial or rugged variants available?
A: Yes. Industrial-grade versions (e.g. SFP‑25G‑LR‑I) support wide temperature ranges and enhanced reliability, often with lifetime warranties.