http://www.rfc-editor.org/rfc/rfc2171.txt
RFC 2171: MAPOS - Multiple Access Protocol over SONET/SDH Version 1, K. Murakami, M. Maruyama1997-06-01T23:00:00-00:00This memo documents a multiple access protocol for transmission of network-protocol datagrams, encapsulated in High-Level Data Link Control (HDLC) frames, over SONET/SDH. This memo provides information for the Internet community. This memo does not specify an Internet standard of any kind.