802.3ah OAM for Carrier-Class Optical Ethernet in the First Mile

802.3ah OAM for Carrier-Class Optical Ethernet in the First Mile

Operations, Administration and Maintenance (OAM) was originally developed to increase the reliability and streamline the maintenance of TDM and SONET/SDH networks. The OAM mechanisms became crucial to network operations and were so effective that they enabled carriers to deliver the famous five nines (99.999%) of network reliability.