Cisco Systems UBR7225VXR specifications Two-Way HFC Cable Network Example

Chapter 1 Cisco uBR7225VXR Overview

Supported System Configurations Overview

–Telco return cable interfaces transmit over the PSTN. Dial-up servers and other equipment handle the upstream traffic and pass appropriate data to the Cisco uBR7225VXR routers. For telco return specifics, refer to the “Telco Return” section on page 1-9.

Figure 1-4shows the architecture of a typical two-way hybrid fiber-coaxial (HFC) network, equipped to support two-way data communication.

Figure 1-4 Two-Way HFC Cable Network Example

Over the air

Headend / Hub

Subscriber

cable modem

10Base-T

channels

Satellite channels

Receivers

Descramblers

Scramblers

AM & digital modulators

Downstream

Optical transmitter

Optical transmitter Optical transmitter

Optical node	RF	Tap
	RF amplifiers
Optical node RF RF		RF
Optical node	RF

RF

RF

RF combiner

RF

Internet

Cisco

uBR7225VXR

Optical receiver

Upstream

271650

Cisco provides a configuration tool—Cisco Network Registrar (CNR)—which is optimized for high performance automatic dynamic IP address allocation to cable interfaces, PCs, and other devices on the broadband network. Cisco also provides an integrated suite of configuration tools, including CNR, for relatively large cable networks called Cisco Subscriber Registration Center (CSRC). CSRC allows large-scale configuration and management of broadband modems. Leveraging the extensibility of CNR, CSRC enables and administers subscriber self-registration. The directory-enabled architecture of CSRC allows it to integrate with Lightweight Directory Access Protocol (LDAP) version 3 directory servers.

For more information on CSRC and CNR involvement in the cable network, refer to the CSRC and CNR documentation.

Cisco Network Registrar Install and Upgrade Guide at the following URL:

http://www.cisco.com/en/US/products/sw/netmgtsw/ps1982/prod_installation_guides_list.html

Cisco Subscriber Registration Centre Installation Guide at the following URL:

http://www.cisco.com/en/US/products/sw/netmgtsw/ps2181/products_installation_guide_chapter09186 a0080086f1a.html

Also refer to the Cisco uBR7200 Series Software Configuration Guide at the following URL:

http://www.cisco.com/en/US/docs/cable/cmts/ubr7200/configuration/guide/cr72scg.html

Cisco uBR7225VXR Universal Broadband Router Hardware Installation Guide

OL-17309-02 1-7