https://app.knowbase.one/vault/rfc/docid/5609
RFC5143: Synchronous Optical Network/Synchronous Digital Hierarchy (SONET/SDH) Circuit Emulation Service over MPLS (CEM) Encapsulation
Network Working Group A. Malis Request for Comments: 5143 Verizon Communications Obsoleted by: 4842 J. Brayley Category: Historic J. Shirron ...