Cisco Systems uBR7200 manual Topology of a Typical Broadband Network

Configuring Headend Broadband Access Router Features

Headend Overview

Figure 106 Topology of a Typical Broadband Network

WAN Internet

ATM, 100BT, 10BT

100BT

Proxy server

Cisco

uBR7246

100BT

100BT

IF

ISP

Analog TV

US-RF

MSO: Multiple Service Organization

signals

5-42 MHz

Upconverter

RF

DS-RF 54-860 Mhz

Combiner

Digital TV

signals

Fiber node

(Telephone pole, underground box)

Fiber

Transceiver

80 km

1000 ft

Two-way	Drop box
distribution
amplifier		11278
Tap	Cable modem

(Cisco uBR904)

Cisco uBR7200 series routers support the DOCSIS 1.0 specifications (and static multiple service identifiers (SIDs) for voice) for the following high-speed data-over-cable interfaces:

•RF interfaces between the Cisco uBR7200 series (CMTS) and the cable network—Downstream and upstream traffic.

•MAC sublayer and associated interfaces.

Cisco IOS Multiservice Applications Configuration Guide