http://www.rfc-editor.org/rfc/rfc3946.txt
RFC 3946: Generalized Multi-Protocol Label Switching (GMPLS) Extensions for Synchronous Optical Network (SONET) and Synchronous Digital Hierarchy (SDH) Control, E. Mannie, D. Papadimitriou2004-10-01T23:00:00-00:00This document is a companion to the Generalized Multi-Protocol Label Switching (GMPLS) signaling. It defines the Synchronous Optical Network (SONET)/Synchronous Digital Hierarchy (SDH) technology specific information needed when using GMPLS signaling. [STANDARDS-TRACK]