Chapter 1 Cisco uBR7225VXR Overview

Supported System Configurations Overview

Figure 1-6 Two-Way IP Telephony Network Example

 

Gateway/PSTN

Service

 

provider

 

backbone

 

Cisco

Cisco

uBR7225VXR

uBR7225VXR

Gatekeeper or

Policy

calling agents

server

HFC

HFC

cable plant

cable plant

Remote

Remote

cable modem

cable modem

 

 

 

 

 

 

 

 

 

 

 

 

Calling party

Called party

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Residence or SOHO*

 

Residence or SOHO*

 

 

subscriber site 1

 

 

subscriber site 2

*Small Office Home Office

 

 

 

 

 

271652

Telco Return

In telco return configurations, the Cisco uBR7225VXR universal broadband router provides downstream data flow from cable interface line cards connected to the cable system and accepts upstream traffic via a combination of the local PSTN and IP network path that terminates at the Cisco uBR7225VXR router. Upstream data transmission takes place over a telephone modem (external or internal to a

cable interface, as well as a cable interface line card in a PC, based on the third-party cable interface vendor) connected to an analog telephone line. Figure 1-7 on page 1-10illustrates a telco return configuration.

Cisco uBR7225VXR Universal Broadband Router Hardware Installation Guide

 

OL-17309-02

1-9

 

 

 

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Cisco Systems UBR7225VXR specifications Telco Return, Hfc