http://www.rfc-editor.org/rfc/rfc4207.txt
RFC 4207: Synchronous Optical Network (SONET)/Synchronous Digital Hierarchy (SDH) Encoding for Link Management Protocol (LMP) Test Messages, J. Lang, D. Papadimitriou2005-10-01T23:00:00-00:00This document details the Synchronous Optical Network (SONET)/Synchronous Digital Hierarchy (SDH) technology-specific information needed when sending Link Management Protocol (LMP) test messages. [STANDARDS-TRACK]