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

Q: What makes the SFP-25G-SR-E different from standard 25G SR transceivers?
A: The E-Series module guarantees BER less than 1E-12 without Forward Error Correction, eliminating approximately 250ns of FEC latency. This makes it specifically designed for ultra-low latency environments such as high-frequency trading and financial networks where every nanosecond counts.

Q: Can I use the SFP-25G-SR-E with standard IEEE 25GBASE-SR optics?
A: Yes, the E-Series transceivers are fully interoperable with standards-based IEEE optics. However, when connecting to standard optics, FEC should be enabled to guarantee reliable operation. For FEC-free operation at maximum reach, use E-Series transceivers at both ends of the link.

Q: What Arista platforms support the SFP-25G-SR-E?
A: The SFP-25G-SR-E is supported on all Arista 25G SFP ports, including the ultra-low latency 7130B Series platforms, 7050X and 7060X switches. It is compatible with any Arista switch featuring 25G SFP28 interfaces.

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

Q: What is the maximum distance supported without FEC?
A: Without FEC, the SFP-25G-SR-E supports up to 30 meters over OM3 multimode fiber or up to 50 meters over OM4 MMF. With optional FEC enabled, reach extends to 50m on OM3 or 100m on OM4 fiber.