100G QSFP28 to 25G SFP28 Adapter Converter Module
QSFP28 to SFP28 adapter converter module enables 25G Ethernet connectivity by allowing a standard 25G SFP28 transceiver to operate in a 100G QSFP28 port.
This adapter is designed for efficient port utilization, smooth network migration, and flexible deployment in modern data center and service provider networks.
The module complies fully with QSFP28 and SFP28 MSA standards and features an integrated MCU that ensures proper I²C communication and register translation between the host system and the inserted SFP28 transceiver.
Only lane 1 of the QSFP28 electrical interface is active; the remaining three lanes are not connected.
Key Features
• Enables 25G SFP28 transceivers in 100G QSFP28 ports
• Cisco-compatible coding
• Integrated MCU for I²C register translation
• Supports DDM / DOM monitoring
• Hot-pluggable adapter module
• Power-efficient and compact design
Important Notes
• A CVR without registers will display the host system’s built-in module information
• A CVR with registers may not expose this information, depending on platform behavior
• Always verify platform compatibility before deployment
Technical Specifications
• Form Factor: QSFP28 to SFP28 Adapter
• Maximum Data Rate: 25 Gbps
• SFP28 Lane Mapping: QSFP28 Lane 1 only
• Connector: SFP28 receptacle
• Maximum Power Consumption: 1.5 W (without SFP28 module installed)
• DDM / DOM: Supported
• Bit Error Rate (BER): = 1 × 10?¹²
• MTBF: 254,709,016 hours
• Operating Temperature (Commercial): –20 °C to +85 °C
Supported Standards & Protocols
• QSFP28 MSA: SFF-8665
• SFP28 MSA: SFF-8432
Typical Applications
• QSFP28 to SFP28 port conversion
• 25G Ethernet deployment on 100G switches
Warranty
• 5-Year Warranty