scope:

This standard establishes physical characteristics and technical criteria for Synchronous Optical NETwork (SONET) interfaces at standard rates associated with the Network Interface (NI), for Multi- Mode Fiber applications. Covered herein are SONET Physical Media Dependent (PMD) specifications (such as optical parameters and connectors). Other necessary criteria for compliance with the proper interfacing of the connecting customer installation equipment are found in the base document of this series. Compliance with this standard addresses network and customer installation compatibility and is not to be construed as a constraint on the internal operations of the network or the customer installation equipment.