Ip Telephony Services; Telco Return - Cisco 7246 - uBR Router Hardware Installation Manual

Chapter 1 Cisco uBR7200 Series Overview

IP Telephony Services

The Cisco uBR7200 series supports the transmission of packetized voice and facsimile traffic over the
cable and IP backbone network.
involving Voice-over-IP (VoIP) telephony services.
Figure 1-7
*Small Office Home Office

Telco Return

In telco return configurations, the Cisco uBR7200 series universal broadband router provides
downstream data flow from cable interface 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 uBR7200
series router. Upstream data transmission takes place over a telephone modem (external or internal to a
cable interface, as well as a cable interface card in a PC, based on the third-party cable interface vendor)
connected to an analog telephone line.
OL-5421-03
Two-Way IP Telephony Network Example
Cisco uBR7200
series
Gatekeeper or
calling agents
HFC
cable plant
Remote
cable modem
Calling party
Residence or SOHO*
subscriber site 1
Cisco uBR7200 Series Universal Broadband Router Hardware Installation Guide
Figure 1-7 on page 1-11 shows a typical two-way configuration
Service
provider
backbone
Policy
server
Called party
Residence or SOHO*
Figure 1-8 on page 1-12
Supported System Configurations Overview
Gateway/PSTN
Cisco uBR7200
series
HFC
cable plant
Remote
cable modem
subscriber site 2
illustrates a telco return configuration.
1-11