SFP-1G-SX-BCC | Arista Compatible 1GB Multi-Mode 550m (1000BASE-SX)

Q: Will this work in place of the Arista SFP-1G-SX?
A: Yes. The SFP-1G-SX-BCC is a plug-and-play replacement for the Arista SFP-1G-SX. It conforms to the same IEEE 802.3z 1000BASE-SX standard, uses the same 850nm wavelength, duplex LC connector, and SFP form factor, ensuring identical electrical and optical behavior in any Arista switch or router with an SFP port.

Q: Which Arista platforms support this transceiver?
A: This transceiver works in any Arista switch or router with an SFP port that supports 1G operation. Arista platforms with SFP, SFP+, or SFP25 ports are compatible, as these ports support multi-rate operation down to 1 Gbps when configured appropriately. Consult the Arista Transceiver and Cable Guide for your specific platform and EOS version.

Q: What fiber types and distances does this module support?
A: This module supports all multi-mode fiber grades. On 50/125µm OM2 fiber, reach is up to 550m. On 62.5/125µm OM1 or FDDI-grade fiber, reach is up to 275m. On OM3 and OM4 fiber, the module also works but the 1000BASE-SX standard does not extend the reach beyond 550m, as these fiber types are optimized for higher-speed applications like 10G.

Q: Can I access DOM data for link monitoring?
A: Yes. This transceiver is SFF-8472 compliant and exposes digital diagnostic data via the two-wire serial interface. You can read real-time values for temperature, supply voltage, TX bias current, TX optical power, and RX optical power. Most Arista EOS versions expose this data via CLI commands for monitoring link health and diagnosing marginal optics before failure.

Q: What is the transmitter type and why does it matter for short links?
A: This module uses an 850nm VCSEL (Vertical Cavity Surface Emitting Laser) transmitter. VCSELs have relatively high output power compared to the receiver sensitivity, providing an 8 to 10 dB link budget. On very short links (under 2 meters), attenuation may be required to avoid overdriving the receiver and causing bit errors. For typical patch panel to switch connections (5m and above), no attenuation is needed.