Cisco SP-AR3-DW0G4056 10GBASE-DWDM 1540.56 nm SFP10G | Enterprise — SP-AR3-DW0G4056

Preserve optical link integrity in dense transport environments with a Cisco 10GBASE-DWDM SFP10G module tuned to 1540.56 nm. This transceiver is designed for networks where wavelength accuracy and predictable optical behavior are essential, especially in metro, aggregation, and service-provider architectures. When fiber capacity is constrained, DWDM optics let teams carry more traffic without changing the physical plant. That makes the module valuable in environments that need disciplined wavelength planning, stable long-haul or regional transport, and consistent interoperability across managed infrastructure. It is a practical fit for teams that prioritize signal precision over generic short-reach optics. For procurement and operations teams, the value is in matching the right optic to the right transport design. A build-to-order Cisco part number also supports controlled sourcing for environments that standardize on approved components and need tighter alignment between network design and supply chain. Ideal For Adding wavelength-specific optics to metro transport links Standardizing transceivers across approved Cisco optical inventories Supporting dense fiber deployments where capacity is constrained Maintaining predictable performance in carrier-grade aggregation networks Why This Product 1 DWDM wavelength tuning supports denser optical planning than generic optics 2 1540.56 nm specification helps match exact transport designs 3 Cisco sourcing supports standardized enterprise inventories 4 SFP10G form factor fits established 10 GbE optical environments