Arista SFP-10G-ERBD-U-Arista | 10G SFP+ BiDi Transceiver, SMF 40km, Tx1270/Rx1330

Q: What is the difference between the SFP-10G-ERBD-U and SFP-10G-ERBD-D?
A: The SFP-10G-ERBD-U is the uplink module that transmits at 1270nm and receives at 1330nm, while the SFP-10G-ERBD-D is the downlink module with opposite wavelengths (Tx1330nm/Rx1270nm). These modules must be deployed in matched pairs at opposite ends of a link to enable bidirectional communication over a single fiber strand.

Q: What type of fiber cable is required for this transceiver?
A: This transceiver requires OS2 single-mode fiber (SMF) terminated with an LC simplex connector. Unlike standard duplex transceivers that use two fiber strands, the BiDi design uses only one strand per link, reducing cabling requirements by 50%.

Q: Can I use this transceiver on shorter links without attenuation?
A: No. Optical attenuation (≥5dB recommended) is required on links shorter than the rated distance to protect the receiver from permanent damage due to overload. Always consult the optical budget specifications when planning short-distance deployments.

Q: Is this transceiver compatible with all Arista switches?
A: The SFP-10G-ERBD-U is compatible with Arista switches running EOS 4.21.3 or later that feature 10G SFP+ ports. Consult Arista's Transceiver and Cable Compatibility Guide to verify support for your specific platform and port configuration.

Q: Does this transceiver support real-time optical monitoring?
A: Yes. The SFP-10G-ERBD-U supports DDM/DOM (Digital Diagnostics Monitoring / Digital Optical Monitoring), allowing network administrators to monitor real-time parameters such as transmit power, receive power, temperature, voltage, and laser bias current directly from the switch management interface.