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Cisco CVA122/CVA122E Hardware Installation Guide
OL-0799-02 (05/2001)
Chapter 1
Product Overview
Cisco CVA122/CVA122E Cable Voice Adapter Description
Provisioning Prerequisites
The following requirements must be met before a cable voice adapter can be provisioned:
•
All required CMTS routing and network interface equipment must be installed, configured, and
operational. This includes all headend routers, servers (DHCP, TFTP, and TOD), network
management systems, and/or other configuration or billing systems required for your network.
•
Based on the quality and capacity of your cable plant, your system administrator or network planner
must have defined your network’s IP address allocation plan; spectrum management plan outlining
the recommended operating parameters to optimize performance; channel plan identifying the
channels available to assign to specific Cisco CVA122/CVA122E Cable Voice Adapters; and dial
plan to match the supported VoIP protocol.
•
A CMTS customer service representative must have recorded all needed subscriber information,
initiated a work order, and arranged an installation date with the subscriber. For subscriber sites that
support multiple telephones or fax devices on a telephone line, all wiring associated with the
telephone line extension must be in place. Inside wiring must be in compliance with the country of
operation to prevent degradation of service.
•
The CMTS system administrator or appropriate personnel must have specified the policy
parameters for the Cisco CVA122/CVA122E Cable Voice Adapter and all computers and other CPE
devices to be supported at the subscriber site. See Cisco’s Network Registrar (CNR) product
documentation for more information.
•
The CMTS system administrator or appropriate personnel must have defined and pushed DHCP and
DOCSIS configuration files to the appropriate servers so that each cable voice adapter, when
initialized, can transmit a DHCP request, receive its IP address, obtain its TFTP and TOD server
addresses, and download its DOCSIS configuration file. Cisco IOS images and Cisco IOS
configuration files must also be prepared for subscribers who are purchasing services that require
new software images and advanced configurations.
Note
The CMTS uses the cable voice adapter’s unique MAC address for the cable
interface to ensure that the cable voice adapter downloads only the file(s)
appropriate for the levels of service that have been purchased.
•
If DHCP is also being used to provision the IP addresses used by the CPE devices at the subscriber’s
site, the DHCP server must be able to respond to those requests as well.
•
The CMTS system administrator must ensure appropriate databases are updated to activate and
support the new subscriber account in the provisioning, billing, and/or network management
systems in place for your network after each cable voice adapter is registered with the CMTS.
•
The following files should be prepared and available on the TFTP server:
–
DOCSIS configuration file—This is required for every installation. The DOCSIS configuration
file specifies the DOCSIS-mandated parameters, such as upstream and downstream
frequencies, as well as optional features, such as whether to download a new software image
or a Cisco IOS configuration file.
–
Cisco IOS image—If upgrading to a Cisco IOS image different from the factory default, that
image must be specified in the DOCSIS configuration file and available on a TFTP server that
is accessible through the cable interface.
–
Cisco IOS configuration file—This text file contains the Cisco IOS command-line interface
(CLI) commands that configure the cable voice adapter for any special configurations and
optional features. It must be made available on a TFTP server that is accessible through the
cable interface.
