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Cisco ONS 15454 SDH Reference Manual, R5.0
April 2009
About this Guide
Note The terms “Unidirectional Path Switched Ring” and “UPSR” may appear in Cisco literature. These terms
do not refer to using Cisco ONS 15xxx products in a unidirectional path switched ring configuration.
Rather, these terms, as well as “Path Protected Mesh Network” and “PPMN,” refer generally to Cisco’s
path protection feature, which may be used in any topological n etwork configuration. Cisco does not
recommend using its path protection feature in any parti cular topological network configuration.
This section explains the objectives, intended audience, and organizatio n of this publication and
describes the conventions that convey instructions and other information.

Revision History

This section provides the following information:
•Document Objectives
•Audience
•Document Organization
•Related Documentation
•Document Conventions
•Obtaining Optical Networking Information
•Obtaining Documentation and Submitting a Service Request
Date Notes
March 2007 Revision History Table added for the first time
October 2007 Updated the About this Guide chapter
April 2008 Added a Note in the “User Password, Login, and Access
Policies” section of the Security chapter.
April 2009 Updated the Cisco ONS 15454 SDH bandwidth specifications
section in “A.1.1 Bandwidth” of Appendix A, Hardware
Specifications.