Installation guide

Release Notes for Cisco uBR7200 Series for Cisco IOS Release 12.1 T

78-10643-04 Rev. B0

Introduction

The Cisco uBR7200 Series Universal Broadband Routers—the Cisco uBR7223, the Cisco uBR7246,

and the Cisco uBR7246 VXR—are based on the Data Over Cable Service Interface Specification

(DOCSIS) standards. Each is designed to be installed at a service provider’s headend facility.

Cisco uBR7200 Series Universal Broadband Routers allow two-way transmission of digital data and

Voice over IP (VoIP) traffic over a hybrid-fiber coaxial (HFC) network. These router function as the

cable modem termination system (CMTS) for subscriber-end devices such as Cisco uBR904 and

Cisco uBR924 Cable Access Routers, and other DOCSIS-compliant cable modems (CMs) and set top

boxes (STBs).

For cable plants not fully upgraded to support two-way cable transmission, the routers support

DOCSIS-compliant telco return, where the cable modem’s return path to the CMTS is via a dial-up

telephone line connection instead of an upstream channel over the coaxial cable. The telco-return

delivery mechanism enables cable operators to accelerate deployment of high-speed data services

before the cable systems are upgraded to two-way plants.

The introduction of the WT2700 Wireless Technology Suite also allows the Cisco uBR7223, the

Cisco uBR7246, and the Cisco uBR7246 VXR Universal Broadband Routers to become a two-way

high-speed point-to-point broadband fixed wireless system that provides a fixed, dedicated wireless link

from one headend site to another. This link delivers full-duplex data in unlicensed U-NII band (5.725

to 5.825 GHz). The WT2700 Wireless Technology Suite includes the point-to-point wireless modem

card, which is installed in the Cisco uBR7200 series chassis, and the power feed panel, which is an

external component.

The Cisco uBR7200 series routers support Internet Protocol (IP) routing with a wide variety of

protocols and combinations of Ethernet, Fast Ethernet, Gigabit Ethernet, serial, High-Speed Serial

Interface (HSSI), Packet over SONET (POS) OC-3 and OC-12c, and Asynchronous Transfer Mode

(ATM) media.

Cisco IOS Release 12.1(5)T supports cable & fixed wireless system configurations using the

Cisco uBR7246 VXR, Cisco uBR7246, and Cisco uBR7223.

Cisco uBR7246 VXR Universal Broadband Router

The Cisco uBR7246 VXR offers an industry-proven CMTS and carrier-class router in a scalable

platform with a high-performance network processing engine to support data, voice, and video services

for medium to large network installations.

The Cisco uBR7246 VXR provides the following major hardware features:

• High-performance network processing engine

• I/O controller

• Up to two network interface port adapters

• Up to four cable and/or wireless modem cards

• Up to two removable power supplies providing load-sharing and redundancy capabilities

• Two Personal Computer Memory Card International Association (PCMCIA) slots that allow for

software upgrades through the use of Flash memory cards

Note The Cisco uBR7246 VXR chassis does not support the MC11-FPGA cable modem card.