Arista QSFP-100G-XCWDM4-Arista | 100G QSFP28 Transceiver, CWDM4, 10km, LC, SMF

Q: What is the difference between QSFP-100G-CWDM4 and QSFP-100G-XCWDM4?
A: The XCWDM4 is the extended-reach variant supporting up to 10 km transmission distance over single-mode fiber, compared to 2 km for the standard CWDM4. Both use the same four CWDM wavelengths but XCWDM4 has enhanced optical specifications for longer distances.

Q: Is this transceiver compatible with other vendors' CWDM4 optics?
A: Yes, this transceiver follows the 100G CWDM4 MSA standard and IEEE 802.3 specifications, enabling interoperability with other IEEE-compliant 100G CWDM4 interfaces from multiple vendors when deployed over appropriate single-mode fiber infrastructure.

Q: Does this module require forward error correction (FEC)?
A: FEC settings should be configured consistently on both link ends. For optimal performance over 10 km distances, enabling FEC is recommended to reduce bit error rates. Check your switch configuration to ensure FEC is enabled or disabled on both sides.

Q: What fiber type and connector are required?
A: This transceiver requires standard G.652 single-mode fiber with duplex LC connectors. It uses WDM technology to multiplex four wavelengths onto a single fiber pair, significantly reducing fiber infrastructure costs compared to parallel optics solutions.

Q: What are typical use cases for this 10 km transceiver?
A: Ideal for data center interconnect between buildings or campuses, metro edge aggregation, enterprise campus backbone links, and any 100GbE application requiring 2-10 km reach over single-mode fiber with cost-effective CWDM technology.