• IEEE 802.3ba 40GBASE-PSM4 compliance ensures each of the four 10Gbps lanes meets 10GBASE-LR optical specifications, enabling native 40G links or breakout to four independent 10GBASE-LR SFP+ ports over the same transceiver and fibre infrastructure
• Four parallel DFB transmitters and PIN photodiode receivers operate independently at 1310nm, each lane supporting up to 11.2Gbps with CML electrical signalling for aggregate bandwidth up to 44.8Gbps
• 7dB minimum link budget per lane supports 10km reach over standard G.652 single-mode fibre, suitable for inter-building campus links, data centre interconnects, and metropolitan area network aggregation
• MPO-12 APC connector interface with 8 active fibres (4 Tx, 4 Rx) minimizes back-reflection and supports both native 40G parallel optics and 4x10G breakout via standard MTP/MPO-8 to 4xLC duplex OS2 breakout cables
• Per-lane digital diagnostics provide independent monitoring of transmit power, receive power, laser bias current, temperature, and supply voltage via I2C interface per SFF-8436, enabling proactive link troubleshooting and optical budget verification
• Hot-swappable QSFP+ form factor with 38-pin electrical interface per MSA allows installation and removal without system interruption, supporting flexible network topology changes and maintenance windows
• Maximum power consumption under 2.5W enables high-density 40G switch deployments without exceeding thermal envelopes in compact chassis designs