Release Notes for Cisco uBR924 Cable Access Router for Cisco IOS Release 12.0 XI 3
Hardware Supported
Note The Cisco uBR924 cable access router interoperates with a DOCSIS 1.0 headend that does
not support multiple CoS. Because voice and data traffic will be mixed, however, voice traffic will
be transmitted on a best effort basis. This may cause poorer voice quality and lower data throughput
when calls are being made from the Cisco uBR924 cable access router’s telephone ports.
When configured to support voice, the Cisco uBR924 cable access router packetizes and transports
voice in compliance with the H.323 protocol. Only version 2 of the H.323 protocol is tested.
H.323v2 is integrated in Cisco gatekeeper/gateway products, such as the 2600 and 3600, in Cisco
IOS Release 12.0(5)T or higher.
Hardware Supported
Cisco IOS Release 12.0(4)XI supports the following hardware features:
• Cisco uBR924 Cable Access Router
The Cisco uBR924 cable access router interacts with the Cable Modem Termination System
(CMTS)—the cable system headend equipment that enables data connectivity between Internet
Protocol (IP) hosts and connected subscribers over the broadband infrastructure. The Cisco
uBR924 cable access router interoperates with any DOCSIS-based CMTS that supports the
feature set.
The router ships from the Cisco factory with a Cisco IOS image that supports data only. Should
your network support digitized voice over an IP network (VoIP) and you have a valid license, you
can download the Cisco IOS image that supports voice from CCO. The router ships from the
Cisco factory with the console port enabled to allow local configuration of the unit.
When configured to support voice, the Cisco uBR924 cable access router uses the H.323
protocol. Other voice protocols will be supported in later releases. The router supports
compression and decompression algorithms (vocoders) such as G.729 and G.711.
The Cisco uBR924 cable access router is able to implement multiple classes of service on the
cable interface. A multiple SID-per-cable access router feature enables the Cisco uBR924 cable
access router to use multiple SID queues for differentiated services. The Cisco uBR924 cable
access router diverts voice call traffic to the higher QoS secondary SID, while forwarding "best
effort" data from the Ethernet interface and MAC messages on the primary SID.
For more information see the “New and Changed Information” section on page 5.
Determining the Version of Your Cisco IOS Software Release
To determine the version of Cisco IOS software running on your Cisco uBR924 cable access router,
log in to the Cisco uBR924 cable access router and enter the show version user EXEC command.
Router#show ver
Cisco Internetwork Operating System Software
IOS (tm) 920 Software (UBR920-Y5-M), Version 12.0(4)XI, EARLY DEPLOYMENT RELEASE
SOFTWARE (fc2)
TAC:Home:SW:IOS:Specials for info
Copyright (c) 1986-1999 by cisco Systems, Inc.
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