Juniper 100GBASE-SR4 QSFP28 Transceiver

The Juniper 100GBASE-SR4 QSFP28 Transceiver (QSFP-100G-SR4-T2) is a high-density, short-reach optical module engineered for 100 Gigabit Ethernet deployments across Juniper's QFX and PTX series platforms. Operating over OM4 multimode fiber using a parallel four-lane architecture, each lane carries 25.78 Gbps using NRZ modulation, aggregating to a 103.125 Gbps line rate. The module conforms to the IEEE 802.3bm 100GBASE-SR4 standard and the QSFP28 MSA form factor, enabling hot-pluggable installation without service interruption.

Designed for structured cabling environments within data center rows and machine rooms, the QSFP-100G-SR4-T2 uses an MPO-12 (MTP) connector interface and supports reaches of up to 70 m on OM3 fiber and up to 100 m on OM4 fiber. The electrical host interface is CAUI-4, providing four 25G electrical lanes toward the switch ASIC. Digital Optical Monitoring (DOM) is supported via the I²C management interface, allowing real-time visibility into temperature, supply voltage, transmit optical power, receive optical power, and bias current — all accessible through Juniper's Junos OS.

The transceiver is validated and qualified by Juniper Networks for use in QFX5100, QFX5200, QFX10000, PTX1000, and PTX10000 series platforms, making it a native fit for leaf-spine IP fabrics, high-performance computing interconnects, and 100G server ToR attachment scenarios. Its low power consumption and compact QSFP28 form factor support high port-density deployments, enabling operators to maximize 100G port counts in both top-of-rack and aggregation switching roles.

Ideal for

• Leaf-to-spine interconnects in Juniper QFX-based Clos IP fabric architectures requiring 100G bandwidth over intra-datacenter OM4 fiber runs
• Top-of-rack 100G uplinks connecting high-throughput servers or storage nodes to QFX5200 or QFX5100 aggregation switches
• PTX1000 or PTX10000 router line-card connectivity for 100G peering and transport segments within a single data center building
• High-performance computing cluster interconnects where low-latency, short-reach 100G parallel optical links are required between compute nodes and fabric switches
• Data center consolidation projects migrating from 10G or 40G infrastructure to 100G Ethernet using existing MPO-12 OM4 structured cabling plant
• Disaggregated network fabric deployments where Juniper PTX platforms act as spine nodes requiring dense 100G optical port populations

Technical specifications

Available from Omnixon Global. Submit an RFQ and our team will confirm configuration and availability for your order.