http://www.rfc-editor.org/rfc/rfc4553.txt
RFC 4553: Structure-Agnostic Time Division Multiplexing (TDM) over Packet (SAToP), A. Vainshtein, YJ. Stein2006-06-01T23:00:00-00:00This document describes a pseudowire encapsulation for Time Division Multiplexing (TDM) bit-streams (T1, E1, T3, E3) that disregards any structure that may be imposed on these streams, in particular the structure imposed by the standard TDM framing. [STANDARDS-TRACK]