SFP28 module ALLNET ALL4777 25Gbit Multimode with LC connector

The ALLNET ALL4777 SFP28 module delivers 25 Gbit/s multimode optical connectivity in a compact SFP28 form factor with an LC duplex connector. Designed for use in compatible switches and network devices, this transceiver enables short-reach high-speed uplinks and server connections over multimode fiber. The module supports hot-plug installation and is intended for environments such as data centers and enterprise networks that require reliable 25G links and flexible deployment options.

Advantages

The module provides a standardized SFP28 interface for easy integration with compatible networking equipment and offers 25 Gbit/s bandwidth for increased throughput compared with 10G links. Its multimode fiber operation and LC duplex connector simplify cabling in short-reach scenarios. The compact SFP28 form factor conserves port density on switches and supports hot-pluggable insertion and removal to minimize downtime during upgrades or maintenance.

Suitable for

• 25G uplinks between switches in data center and campus environments
• Server-to-switch connections requiring 25 Gbit/s multimode links
• Short-reach multimode fiber runs in wiring closets and equipment racks
• Upgrading existing multimode infrastructures from 10G to 25G

Key specifications

• Interface: SFP28 form factor with LC duplex optical connector
• Data rate: 25 Gbit/s
• Fiber type: Multimode fiber (MMF) compatible
• Optical reach: short-reach multimode distances (device support and cable grade dependent)
• Hot-pluggable: supports insertion and removal without powering down the host device

How to use

Insert the SFP28 module into a compatible SFP28 port on your switch or network device until it latches securely. Connect an LC duplex multimode fiber patch cable to the module, ensuring correct polarity for transmit and receive channels. Confirm link status and speed in the host device management interface or LEDs. To remove the module, disengage the latch mechanism and pull it straight out while the device remains powered if hot-plug removal is supported. Verify that endpoints and cables meet multimode grade and distance requirements for reliable 25G operation.

Recommendations

Use high-quality OM3/OM4 multimode fiber and verified LC duplex patch cords to achieve specified short-reach performance. Check compatibility lists from the switch vendor and update device firmware if necessary before deploying at scale. Avoid excessive bending or stress on fiber cables and ensure proper cleaning of connector endfaces prior to mating.