%% You should probably cite rfc2823 instead of this I-D. @techreport{ietf-pppext-sdl-05, number = {draft-ietf-pppext-sdl-05}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-ietf-pppext-sdl/05/}, author = {James D. Carlson and Paul Langner and James Manchester and Enrique J. Hernandez-Valencia}, title = {{PPP over Simple Data Link (SDL) using SONET/SDH with ATM-like framing}}, pagetotal = 28, year = 1999, month = oct, day = 19, abstract = {This document extends methods found in the Point-to-Point Protocol (PPP) and RFCs 1662 and 2615 to include a new encapsulation for PPP called Simple Data Link (SDL). SDL provides a standard method for transporting multi-protocol datagrams over point-to-point links, and RFCs 1662 and 2615 provide a means to carry PPP over Synchronous Optical Network (SONET) and Synchronous Digital Hierarchy (SDH) circuits. SDL provides a very low overhead alternative to HDLC-like encapsulation, and can also be used on SONET/SDH links. This memo defines an Experimental Protocol for the Internet community.}, }