What Is QSFP112 Transceiver?_
The QSFP112 transceiver is a form factor for network interfaces that can deliver aggregate data rates of up to 112 Gbps per electrical lane, commonly used in 400G Ethernet or InfiniBand links. It is designed to be backward compatible with QSFP56 and QSFP28 cages, allowing for incremental upgrades in existing fabric infrastructure. These modules typically use MPO connectors for parallel fiber or direct-attach copper cables for short-reach connections.
Technical Details
QSFP112 modules operate with four electrical lanes, each running at 112 Gbps PAM4 signaling, to achieve an aggregate speed of up to 400 Gbps. They are hot-pluggable and use a push-pull latching mechanism, with no torque screws, for secure insertion into switch or NIC ports. The transceiver's power consumption and reach vary by media type—for example, optical modules for multimode fiber (SR4) or single-mode fiber (DR4/FR4) follow MSA standards, while direct-attach copper cables are limited to shorter distances. In GPU networking, QSFP112 is often used for scale-out InfiniBand or Ethernet connections, distinct from the copper NVLink spine inside the rack.
How Leviathan Systems Works with QSFP112 Transceiver
In our field deployments, QSFP112 transceivers are installed in GPU nodes and top-of-rack switches for the scale-out fabric, requiring careful handling of MPO connectors to avoid dust or damage. We verify link status and optical power levels per OEM specs during commissioning to ensure fabric integrity.
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