http://www.rfc-editor.org/rfc/rfc2363.txt
RFC 2363: PPP Over FUNI, G. Gross, M. Kaycee, A. Li, A. Malis, J. Stephens1998-07-01T23:00:00-00:00This document describes the use of ATM Frame User Network Interface (FUNI) for framing PPP encapsulated packets. [STANDARDS-TRACK]