Editing Small Form-factor Pluggable (section)

==Digital diagnostics monitoring==

Modern optical SFP transceivers support standard digital diagnostics monitoring (DDM) functions.<ref>{{citation |url=https://ta.snia.org/kws/public/download/294/SFF-8472.PDF |title=SFF-8472 |date=21 November 2014 |archive-url=https://web.archive.org/web/20170317055100/https://ta.snia.org/kws/public/download/294/SFF-8472.PDF |archive-date=2017-03-17}}</ref> This feature is also known as digital optical monitoring (DOM). This capability allows monitoring of the SFP operating parameters in real time. Parameters include optical output power, optical input power, temperature, laser bias current, and transceiver supply voltage. In network equipment, this information is typically made available via [[Simple Network Management Protocol]] (SNMP). A DDM interface allows end users to display diagnostics data and alarms for optical fiber transceivers and can be used to diagnose why a transceiver is not working.