A simple data link (SDL) protocol for next generation packet network. - Bharat T. Doshi; Subrahmanyam Dravida; Enrique J. Hernandez-Valencia; Wassim Matragi; M. Akber Qureshi; Paul Langner; Jon Anderson; James S. Manchester (IEEE J. Sel. Areas Commun., 2000)

PPP over Simple Data Link (SDL) using SONET/SDH with ATM-like framing. - James Carlson; Paul Langner; Enrique J. Hernandez-Valencia; James S. Manchester (RFC, 2000)