Configuring Headend Broadband Access Router Features
Voice over IP Services
Cisco IOS Multiservice Applications Configuration Guide
• Data interfaces for cable modems and CPE devices, as well as the CMTS network-side interface
between the Cisco uBR7200 series routers and the data network.
• Operations support interfaces—Network element management layer interfaces between the network
elements and the operations support systems.
• Telco return interfaces—Interfaces between third-party DOCSIS-based cable modems and the telco
return path(s) when the return path is not provided by the cable network.
Cisco cable modem cards residing in the Cisco uBR7200 series routers provide the interface between the
protocol control information (PCI) bus on the router and the RF signal on the HFC network. The
subscriber-end cable modems and Cisco cable access routers are connected to the HFC network through
upconverters and the Cisco cable modem cards.
The Cisco uBR7200 series routers support a variety of cable modem cards with different upstream and
downstream transmission capabilities and features. You must install at least one Cisco cable modem card
in the Cisco uBR7200 series chassis to establish communication between the Cisco uBR7200 series and
the HFC network. For detailed information, refer to the Cisco uBR7200 Series Universal Broadband
Router Hardware Installation Guide.
Voice over IP Services
Figure 107 shows a typical two-way configuration involving Voice over IP (VoIP) telephony services.
The Cisco uBR7200 series supports the transmission of digitized voice and facsimile traffic over the
cable and IP backbone network.
