Brocade Compatible 40G-QSFP-LM4 QSFP+ 40GBase-IR4 form factor network transceiver supports a distance of up to 2km over multi-mode fibre/single-mode fibre (MMF) using a wavelength of 1310nm via an LC Duplex connector. This product operates within a commercial temperature range. Digital optical monitoring (DOM) support is also present enabling real-time monitoring of the parameters of the fibre optic transceiver, meets the specification of Brocade 40G-QSFP-LM4, and rigorously tested products record a unique traceable serial number and are fully compliant with all MSA (Multi-Source Agreement) and IEEE standards & protocols.