Arista SFP-25G-SR-E-Arista | 25G SFP28 Transceiver, Multi-Mode, 850nm, 50m No-FEC

Q: What makes the SFP-25G-SR-E different from standard 25G SR transceivers?
A: The E-Series (Enhanced Performance) variant guarantees a worst-case BER of less than 1E-12 without Forward Error Correction, eliminating approximately 250ns of FEC-related latency. This makes it purpose-built for ultra-low latency applications like high-frequency trading and financial networks where every nanosecond counts.

Q: What distance can this transceiver achieve without FEC?
A: Without FEC enabled, the SFP-25G-SR-E supports up to 30 metres over OM3 multimode fibre or up to 50 metres over OM4 fibre. When FEC is enabled, the reach extends to 50m over OM3 or 100m over OM4, providing deployment flexibility based on your latency requirements.

Q: Does this transceiver support DDM/DOM optical diagnostics?
A: Yes, the SFP-25G-SR-E includes built-in Digital Diagnostic Monitoring (DDM/DOM), allowing real-time monitoring of transceiver parameters including TX/RX optical power, temperature, supply voltage, and laser bias current directly through your switch management interface.

Q: Is the SFP-25G-SR-E compatible with all Arista 25G SFP ports?
A: Yes, this transceiver is compatible with all Arista 25G SFP28 ports and is particularly recommended for Arista 7130B Series ultra-low latency platforms. It is fully compliant with IEEE 25GBASE-SR and SFP28 MSA standards for seamless integration.

Q: Can I use this transceiver in 10G ports or dual-rate applications?
A: While Arista 25G SFP ports generally support backward compatibility with 10G optics, the SFP-25G-SR-E is optimised for 25G applications. For dual-rate 10G/25G operation, Arista offers specific dual-rate transceivers. Check your switch datasheet for supported operating modes.