Chapter 1 Product Overview; Cisco Ubr924 Cable Access Router Description; Introduction - Cisco uBR924 Installation Manual

Product Overview
This chapter describes the Cisco uBR924 cable access router and its interaction with the Cable Modem
Termination System (CMTS)—the cable system headend equipment that provides Internet (TCP/IP)
connectivity for subscribers over the cable broadband infrastructure. The chapter provides physical and
functional overviews of the Cisco uBR924 cable access router and its supported operating modes.

Cisco uBR924 Cable Access Router Description

This section provides an overview of the Cisco uBR924 cable access router, its hardware, and its basic
operation:
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Introduction

The Cisco uBR924 cable access router functions at its most basic level as a cable modem—a
modulator/demodulator that provides high-speed network access on the cable television system to
residential and small office/home office (SOHO) subscribers. The router is based on the
Data-Over-Cable Service Interface Specifications (DOCSIS), a standard developed with service
providers to ensure that any DOCSIS-certified cable modem can interoperate with any bidirectional,
DOCSIS-qualified CMTS.
Note Information about DOCSIS requirements and current specifications are available at the
CableLabs web site at http://www.cablelabs.com.
In addition to providing DOCSIS connectivity, the Cisco uBR924 router can optionally provide
advanced data and routing features, as well as telephone and fax services. The Cisco uBR924 router
uses the cable system's existing physical plant to provide Internet and other wide area network (WAN)
connectivity over the service provider's Hybrid/Fiber Coax (HFC) cable system.
OL-0338-01 (3/2000)
Introduction
Initial Power-On and Provisioning
Data Operations
Voice Operations
C H A P T E R
Cisco uBR924 Router Hardware Installation Guide
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