Netwerk-transceivermodule Cisco SFP28-25GSR-85 25Gbps 850nm 100m duplex LC MMF

The Cisco SFP28-25GSR-85 is a 25Gbps SFP28 optical transceiver module designed for short-reach multimode fiber links. It operates at an 850nm wavelength and supports duplex LC fiber connections, providing reliable 25 Gigabit Ethernet connectivity over multimode fiber up to 100 meters. The module is intended for use in compatible 25G switch and host ports where compact form-factor, low latency, and high-density deployment are required.

Advantages

This transceiver delivers 25Gbps data rates over multimode fiber with low power consumption and a compact SFP28 form factor that supports high-density port deployments. Its duplex LC interface simplifies cabling with standardized connectors, while operation at 850nm is optimized for short-reach multimode environments. The module is compatible with standard 25G Ethernet signaling and is suitable for integration into data center topologies requiring predictable optical performance.

Suitable for

• Server-to-switch connections in data centers
• Top-of-rack and aggregation switch uplinks
• Short-reach multimode fiber interconnects up to 100 meters
• High-density networking environments where SFP28 is supported

Key specifications

• Data rate: 25 Gbps
• Wavelength: 850 nm
• Maximum reach: up to 100 meters over multimode fiber (MMF)
• Connector type: duplex LC
• Form factor: SFP28
• Fiber type: multimode fiber (MMF)

How to use

Insert the SFP28 module into a compatible 25G-capable SFP28 slot on the switch or host interface until it latches. Connect duplex multimode LC patch cables between the module and the corresponding fiber infrastructure, ensuring correct transmit/receive orientation. Verify link status and speed via the network device management interface and monitor optical parameters such as received power and link integrity. Follow standard electrostatic discharge (ESD) precautions when handling the module and remove dust caps from the connectors before insertion.

Recommendations

Use OM3 or OM4 multimode fiber for optimal margin at 25Gbps and keep fiber runs within the specified 100 m reach. Maintain proper cable management and clean LC connectors before making connections to ensure reliable optical performance. Confirm compatibility with the host device firmware or compatibility matrix to avoid link negotiation issues.