DWDM-SFP-3977-RF — Cisco SFP

The DWDM-SFP-3977-RF is a Cisco DWDM SFP module in Cisco Refresh (RF) version, designed for transmissions over single-mode fiber in dense wavelength-division multiplexing networks. It operates on a dedicated channel of the DWDM grid, with no wavelength value specified in the available technical data. The SFP form factor ensures seamless integration into all compatible Cisco platforms.

This RF reference allows network teams to expand or renew their DWDM module fleet at lower cost, with the same compatibility guarantees as a new module. The DWDM-SFP-3977-RF stands out within the DWDM-SFP family through its unique SKU, identifying a dedicated channel for spectral planning. Cisco Certified Refurbished module, manufacturer warranty.