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Small rectangular QSFP28 transceiver module with metal housing and label

Axiom

Axiom 845966-B21-AX 100GBASE-SR4 QSFP28 SFP transceiver

SKU CH-7VFK-DMFPT MPN 845966-B21-AX

QSFP28 transceiver delivers 100 GBps over multimode fibre for high-density 100G links

  • 100 Gbps throughput with QSFP28 form factor
  • SR4 short-range optics for multimode fibre links
  • Purpose-built for HP 845966-B21 compatibility
  • 28 Gbaud lane rate across four channels
  • 21 dB optical budget supports extended reach

Transceiver for 100 GBps links

The Axiom 845966-B21-AX is a QSFP28 transceiver built for 100GBASE-SR4 connections. It serves data-centre operators and network engineers who need short-reach 100 GBps links over multimode fibre. The module plugs directly into compatible QSFP28 ports on switches or routers.

Port and fibre checks before ordering

Confirm the host equipment accepts QSFP28 modules and supports the 100GBASE-SR4 standard. Verify that the patch cables are OM3 or OM4 multimode fibre with MPO connectors. Ensure the link distance matches the SR4 reach specification for the chosen fibre grade.

Steady throughput under load

The transceiver maintains the rated 100 GBps data rate during continuous traffic rather than only in brief bursts. Thermal design keeps signal integrity stable across extended operating periods. Consistent optical output reduces bit errors on sustained high-volume flows.

Highlights

  • 100 Gbps throughput with QSFP28 form factor
  • SR4 short-range optics for multimode fibre links
  • Purpose-built for HP 845966-B21 compatibility
  • 28 Gbaud lane rate across four channels
  • 21 dB optical budget supports extended reach

Specifications

No published specifications for this item yet.

Questions about this item

Does the 845966-B21-AX include cables or do I need to purchase multi-mode fibre separately?

The transceiver is supplied on its own; compatible OM3 or OM4 MTP/MPO patch cables must be ordered separately.

How do I confirm the 100 GBps QSFP28 is the right module for my HP switch port?

Match the switch port to the 100GBASE-SR4 QSFP28 form factor and verify the HP part number 845966-B21 in the hardware compatibility list.

What does the 100 GBps headline rate deliver inside a live rack?

The module provides a 100 GBps lane-aggregated link over parallel multi-mode fibre for short-reach server-to-switch or switch-to-switch connections.

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