Network adapter kit HP Enterprise Adaptor Kit 655874-B21-RFB QSFP to SFP+

HP Enterprise Adaptor Kit 655874-B21-RFB QSFP to SFP+ provides a mechanical and electrical interface conversion that allows SFP+ modules or direct-attach cables to be used in QSFP ports on compatible HP Enterprise network equipment. The kit supports standard QSFP and SFP+ form factors and is intended to preserve existing SFP+ cabling and transceivers when upgrading or reconfiguring switches and routers in data center and enterprise networking environments.

Advantages

The adaptor kit enables port-level flexibility by converting a QSFP port to accept SFP+ modules or cables without requiring replacement of the host module. This reduces equipment downtime and lowers migration cost by reusing installed SFP+ optics and cables. The product is designed to match form-factor and electrical requirements for supported HP Enterprise devices and preserves signal integrity for high-speed links when used according to manufacturer guidelines.

Suitable for

• Reusing SFP+ transceivers and DAC/active cables on equipment with QSFP ports
• Data center port migration and incremental capacity upgrades
• Mixed-speed environments where 10Gb SFP+ connectivity is needed alongside QSFP-based infrastructure
• Testing and lab setups that require QSFP-to-SFP+ interoperability

Key specifications

• Brand: HP Enterprise
• Manufacturer part number (MPN): 655874-B21-RFB
• EAN: 5712505720943
• Form factor conversion: QSFP to SFP+
• Intended use: interface conversion to accept SFP+ modules/cables in QSFP ports
• Typical application: enterprise and data center network equipment compatibility

How to use

Install the adaptor into a compatible QSFP port on the host device following the device manufacturer’s mechanical insertion procedure. Once the adaptor is seated, insert a compatible SFP+ transceiver or SFP+ direct-attach cable into the adaptor until it latches. Verify link status and speed through the switch or router management interface and confirm that the connected SFP+ module is supported by the host platform. Follow any firmware or configuration guidelines from HP Enterprise for port mode, speed negotiation, and optical parameters.

Recommendations

Use HP Enterprise-approved SFP+ modules and cables for best compatibility. Check the host device release notes and supported optics list before deployment. Avoid forcing mechanical insertion and ensure static discharge precautions during installation. For mission-critical links, validate performance at expected traffic loads and monitor link health via device management tools.