Cisco 1000BASE-SX SFP transceiver module, MMF, 850nm, DOM

"1000BASE-SX SFP transceiver module, MMF, 850nm, DOM (digital optical monitoring) Modul support DOM functions according to the industry-standard SFF-8472 multisource agreement (MSA). This feature gives the end user the ability to monitor real-time parameters of the SFP, such as optical output power, optical input power, temperature, laser bias current, and transceiver supply voltage."