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Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide
OL-2239-05
Chapter1 Overview of Cisco uBR7200 Series Software
Supported Software Features for the Cisco uBR7200 Series
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An upstream can be configured for a mixed, TDMA/A-TDMA mode, to support both DOCSIS
1.0/DOCSIS 1.1 and DOCSIS 2.0 cable modems on the same upstream.
Note DOCSIS 2.0 A-TDMA cable modems will not register on a TDMA upstream if an A-TDMA or
mixed upstream exists in the same MAC domain, unless the CMTS explicitly switches the cable
modem to another upstream using an Upstream Channel Change (UCC) message. DOCSIS 1.0
and DOCSIS 1.1 cable modems cannot register on an A-TDMA only upstream.
• A-TDMA mode defines new interval usage codes (IUC) of A-TDMA short data grants, long data
grants, and Unsolicited Grant Service (UGS) grants (IUC 9, 10, and 11) to supplement the existing
DOCSIS 1.1 IUC types
• Increases the maximum channel capacity for A-TDMA upstreams to 30 Mbps per 6 MHz channel.
• A-TDMA and mixed modes of operation provide higher bandwidth on the upstream using new
32-QAM and 64-QAM modulation profiles. In addition, an 8-QAM modulation profile is supported.
• Supports a minislot size of 1 tick for A-TDMA operations.
• Increases channel widths to 6.4 MHz (5.12 Msymbol rate).
For additional information on DOCSIS 2.0 A-TDMA Support on the Cisco uBR-MC16U/X card, refer
to the section, "DOCSIS 2.0 A-TDMA Support" in Configuring the Cisco uBR-MC16U/MC16X Cable
Interface Line Card on Cisco.com:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122limit/122cy/
122c x_15/mc16uxfm.htm
For additional information on DOCSIS 2.0 A-TDMA Support on the Cisco uBR-MC28U/X card, refer
to the section, "DOCSIS 2.0 A-TDMA Support" in Configuring the Cisco uBR-MC28U/MC28X Cable
Interface Line Card on Cisco.com:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122limit/122cy/
122cx_15 /mc28uxfm.htm
High Availability Features
Several powerful High Availability features are supported on the Cisco uBR7200 series:
• Cisco DDC (Dual DOCSIS Channel), page 1-69
• DRP Server Agent, page 1-69
• DSX Messages and Synchronized PHS Information, page 1-69
• Globally Configured HCCP 4+1 Redundancy on the Cisco uBR7246VXR Router, page 1-70
• HCCP Support for the Cisco uBR-MC16S Cable Interface Line Card, page 1-70
• HCCP N+1 Redundancy, page 1-71
• High Availability Features in CiscoIOS Release 12.3(13a)BC, page 1-71
• High Availability Support for Encrypted IP Multicast, page 1-71
• Hot-Standby 1+1 Redundancy, page 1-72
• IF Muting for HCCP N+1 Redundancy, page 1-72