Specifications

2
Release Notes for Cisco uBR924 Cable Access Router for Cisco IOS Release 12.1(5)T
OL-0385-04 Rev. B0 (2/2001)
Introduction
• Limitations and Restrictions, page 18
• Important Notes, page 20
• Caveats, page 26
• Related Documentation, page 34
• Obtaining Documentation, page 39
• Obtaining Technical Assistance, page 40
Introduction
The DOCSIS-based Cisco uBR924 Cable Access Router gives residential or small office/home office
(SOHO) subscribers high-speed Internet or Intranet access. The Cisco uBR924 Cable Access Router
supports both data traffic and packet voice and fax traffic via a shared two-way cable system and
Internet Protocol (IP) backbone network. The Cisco uBR924 Cable Access Router connects computers
and other customer premises devices at a subscriber site to the service provider’s cable, hybrid-fiber
coaxial (HFC), and IP backbone network.
The Cisco uBR924 Cable Access Router is based on Data-over-Cable Service Interface Specifications
(DOCSIS) and interoperates with any bidirectional, DOCSIS-qualified cable modem termination
system (CMTS). The Cisco uBR924 Cable Access Router ships from the Cisco factory with a
Cisco IOS software image stored in nonvolatile Flash memory that supports DOCSIS-compliant
bridging data operations. The Cisco uBR924 Cable Access Router functions as a cable modem at the
subscriber site to convey data communications on the cable television system.
Note For information on new features and Cisco IOS commands supported by Release 12.1 T,
see the “New and Changed Information” section on page 10 and the “Related
Documentation” section on page 34.
Based on the feature licenses your company purchased, other Cisco IOS images can be downloaded
from Cisco Connection Online (CCO). Special operating modes, based on your service offering and the
practices in place for your network, can be supported for the Cisco uBR924 router, based on the
available images in Cisco IOS Release 12.1(5)T. The Cisco uBR924 Cable Access Router can also
function as an advanced router, providing wide-area network (WAN) data connectivity in a variety of
configurations.
Note All Cisco uBR924 Cable Access Router images support DOCSIS Baseline Privacy
Interface (BPI) encryption. BPI is subject to export restrictions.
Cisco uBR924 Cable Access Router
The Cisco uBR924 Cable Access Router features a single F-connector interface to the cable system,
four RJ-45 (10BaseT Ethernet) hub ports, two RJ-11 Foreign Exchange Station (FXS) voice ports, one
RJ-11 port for an optional backup analog telephone line connection, and one RJ-45 console port to
connect to a laptop computer/console terminal for local Cisco IOS configuration. The Cisco uBR924
Cable Access Router supports voice and data Cisco IOS software images; available feature sets include
Easy IP, Firewall Phase II (Cisco Secure Integrated Software), and IP security (IPSec).