The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language.
This preface explains the objectives, intended audience, and organization of this Cisco CRS Carrier Routing System 4-Slot Line Card Chassis System Description, commonly referred to as the system description in this document, and presents the conventions that convey additional information. This preface includes the following sections:
This system description describes the Cisco CRS 4-Slot Line Card Chassis from a high level. It provides background information and basic theory of operation for anyone wanting to understand the routing system. It describes the major assemblies that comprise the line card chassis. It can be read as a supplement to the site planning guide, installation documents, and software documents. This system description focuses on the hardware elements of the line card chassis and is not a planning, installation, or configuration guide.
This guide is intended for general audiences who want an overview of the Cisco CRS 4-Slot Line Card Chassis and its major components.
This system description contains the following chapters and appendixes:
This guide uses the following conventions:
Note | Means >reader take note . Notes contain helpful suggestions or references to materials not contained in this manual. |
Caution | Means >reader be careful . You are capable of doing something that might result in equipment damage or loss of data. |
|
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS |
See Cisco CRS Carrier Routing System Regulatory Compliance and Safety Information for translations of warnings and information about the compliance and safety standards with which the Cisco CRS routing system conforms.
For a complete listing of Cisco CRS planning, installation, and configuration documents, see the following publications:
See the Obtaining Documentation, Obtaining Support, and Security Guidelines for information on obtaining these and other publications.
The following table lists the technical changes made to this document since it was first printed.
Date |
Change Summary |
---|---|
April 2012 |
Added Alarm Port section with pin outs to Chapter 6 to fix caveat. |
August 2011 |
Minor editorial change to Figure 1-1 to fix caveat. |
July 2011 |
Added information about the CRS-LSP Label Switch Processor (LSP) card to the following sections: |
April 2011 |
Added information about new performance route processor (PRP) cards (Cisco product IDs: CRS-8-PRP-6G, CRS-8-PRP-12G). Minor editorial changes were also made. |
October 2010 |
Added information about the new MSC-140 and FP-140 line cards, QQ123-140G switch fabric card, 20-port and 14-port 10-GE XFP PLIMs, and the 1-port 100-GE CFP PLIM. Minor editorial and technical changes were also made. |
July 2009 |
Module updates. |
March 2008 |
Minor editorial changes. |
June 2007 |
The revision includes general technical corrections. |
March 2007 |
Added description of DC power in Chassis Power System. Also updated Cisco CRS 4-Slot Line Card Chassis System Specifications with DC power specifications. |
November 2006 |
Initial release of this document. |
For information on obtaining documentation, obtaining support, providing documentation feedback, security guidelines, and also recommended aliases and general Cisco documents, see the monthly What’s New in Cisco Product Documentation , which also lists all new and revised Cisco technical documentation, at:
http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html