Arista 400GBASE-ZR QSFP-DD Digital Coherent Tunable Transceiver, up to 120 km

At up to 120 km, the Arista QDD-400G-ZR is a long-reach coherent optic. Its title calls it a 400GBASE-ZR QSFP-DD digital coherent tunable transceiver, running on single-mode fiber.

Tunable in the title means the wavelength is adjustable, which helps on long routes where wavelengths are assigned. Coherent modules like this are used for data center interconnect across a city or region. Coherent modules are usually bought in matched pairs and tested before deployment, so tell us the quantity, and we will confirm what is available together. Ask about condition options if you are building a spare pool.

Because long-haul links depend on route design, send your distance and any amplification details with your request. The part is available as a new or refurbished module, each with 1 year or 3 years of warranty.