Cisco Cisco IOS Software Release 12.2(2)XA
5
OL-2052-01 Rev. B0
System Requirements
•
Memory Recommendations
lists the memory recommendations for each of the feature sets available for the cable voice
adapter in Cisco IOS Release 12.2(2)XA4.
Headend Interoperability
DOCSIS Concatenation
If using DOCSIS concatenation with a 16-QAM ((quadrature amplitude modulation) symbol rate, the
CMTS must be configured for Unique Word 16 in the preamble for both short and long data burst
profiles. On the Cisco uBR7200 series universal broadband routers, use the cable modulation-profile
global configuration command and specify “uw16” for both the long and short modulation profiles.
CMTS must be configured for Unique Word 16 in the preamble for both short and long data burst
profiles. On the Cisco uBR7200 series universal broadband routers, use the cable modulation-profile
global configuration command and specify “uw16” for both the long and short modulation profiles.
DOCSIS 1.0+ Extensions
The cable voice adapter supports the Cisco DOCSIS 1.0+ Extensions, which include dynamic
multi-Service ID (multi-SID) assignment and concatenation. The CMTS must also support the dynamic
multi-SID and concatenation features. If you are using the Cisco uBR7200 series headend equipment as
the CMTS router, Cisco IOS Release 12.1(1)T or greater is required on the CMTS router to ensure that
these features are activated.
multi-Service ID (multi-SID) assignment and concatenation. The CMTS must also support the dynamic
multi-SID and concatenation features. If you are using the Cisco uBR7200 series headend equipment as
the CMTS router, Cisco IOS Release 12.1(1)T or greater is required on the CMTS router to ensure that
these features are activated.
To configure the cable voice adapter to support multiple classes of service, use either the
Cisco Subscriber Registration Center (CSRC) tool or the configuration file editor of your choice.
DOCSIS configuration files can contain multiple classes of service (CoS) to support voice and other
real-time traffic. The first CoS is used for data (and voice if no other CoS is defined), and additional
classes of service can be defined to give higher priority for voice and other real-time traffic.
Cisco Subscriber Registration Center (CSRC) tool or the configuration file editor of your choice.
DOCSIS configuration files can contain multiple classes of service (CoS) to support voice and other
real-time traffic. The first CoS is used for data (and voice if no other CoS is defined), and additional
classes of service can be defined to give higher priority for voice and other real-time traffic.
Supported Hardware
The Cisco CVA122 Cable Voice Adapter and Cisco CVA122E Cable Voice Adapter contain the
following interfaces:
following interfaces:
•
One F-connector interface to the cable system.
•
One 10BASE-T Ethernet RJ-45 port that can be connected to a single computer with an Ethernet
network interface card (NIC). If supported by the service provider, the Ethernet interface can also
be connected to an Ethernet hub, which then can be connected to additional computers or devices at
the site.
network interface card (NIC). If supported by the service provider, the Ethernet interface can also
be connected to an Ethernet hub, which then can be connected to additional computers or devices at
the site.
Table 2
Memory Recommendations for the Cisco CVA122 Cable Voice Adapter
and Cisco CVA122E Cable Voice Adapter, Release 12.2(2)XA4 Feature Sets
and Cisco CVA122E Cable Voice Adapter, Release 12.2(2)XA4 Feature Sets
Feature Set Matrix Term
Image Name
Minimum
Flash Memory
Flash Memory
Minimum
DRAM Memory
DRAM Memory
Runs
From
From
Base IP Routing + Voice
cva120-k8v4y5-mz
8 MB Flash
16 MB DRAM
RAM