Arista 400GBASE-LR4 QSFP-DD Transceiver, 10 km Duplex Single-Mode

When shorter-reach modules are not enough, the Arista QDD-400G-LR4 stretches a duplex single-mode link to 10 km. The module is a QSFP-DD at 400GbE, titled 400GBASE-LR4.

It works with a duplex pair, which is the arrangement most existing single-mode plants already have. That makes it the logical choice for inter-building and inter-site links on existing fiber. Before ordering, verify the fiber type and the length of the span, and check your switch lists this module type as supported.

Optics at both ends of a link need to be the same standard, so list the far-end hardware when you ask for pricing. The module is a single-port unit. This part can be requested new, refurbished or used, with 1 year or 3 years of warranty for new and refurbished and 90 days for used.