Cisco Systems UBR7225VXR specifications Telco Return, Hfc

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

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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

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