Transparent SDH/SONET over Packet

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Last updated 2016-07-21 (latest revision 2016-01-18)
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This document describes the Transparent SDH/SONET over Packet (TSoP) mechanism to encapsulate Synchronous Digital Hierarchy (SDH) or Synchronous Optical NETwork (SONET) bit-streams in a packet format, suitable for Pseudowire (PW) transport over a packet switched network (PSN). The key property of the TSoP method is that it transports the SDH/SONET client signal in its entirety through the PW, i.e., no use is made of any specific characteristic of the SONET/SDH signal format, other than its bit rate. The TSoP transparency includes transporting the timing properties of the SDH/SONET client signal. This ensures a maximum of transparency and a minimum of complexity, both in implementation and during operation.


Gert Manhoudt (
Stephan Roullot (
Kin Wong (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)