91C9R Dell 25GbE SFP28 850nm Short-Wavelength Optical Transceiver

The Dell 91C9R is a 25 Gigabit Ethernet (25GbE) SFP28 optical transceiver designed to provide network connectivity over multimode fiber. It uses a short-wavelength 850nm laser suited for short-reach fiber optic links.

This transceiver typically finds use in data center environments and enterprise networks requiring 25GbE speeds for server uplinks, switch interconnects, or high-bandwidth application delivery.

• Supports 25GbE data transmission via the SFP28 interface
• Uses 850nm wavelength laser optimized for multimode fiber (MMF)
• Compact SFP28 form factor for compatibility with various Dell networking devices
• Designed for short-reach distances typical of data center fiber links
• Enables high-speed connections in enterprise and data center infrastructures

This transceiver provides a standardized solution for integrating 25GbE connectivity into existing optical networks using multimode fiber. Its short-wavelength design supports typical short-distance links within racks or adjacent racks, facilitating scalable network architectures.