PLANET QSFP-40G series consists of Quad Small Form Factor Pluggable (QSFP) transceiver modules that are specifically designed for high-performance integrated duplex data link over single mode optical fiber. These transceiver modules are compliant with the QSFP Multisource Agreement (MSA) and hot pluggable. These modules offer an easy way to be installed in QSFP MSA compliant ports at any time without the interruption of the host equipment operation. The QSFP-40G series also supports SFP-DDM (Digital Diagnostic Monitor) function that greatly helps network administrator to easily monitor real-time parameters of the SFP, such as optical output power, optical input power, temperature, laser bias current, and transceiver supply voltage.