Cisco Broadband Cable Command Reference Guide

Chapter 1 Overview
Table 1-3 Principle Software Features
Feature Category Item
Provisioning and Maintenance
Options (continued)
Quality of Service (QoS)--
DOCSIS 1.0 and
DOCSIS 1.0 extensions
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Cisco Broadband Cable Command Reference Guide
Cisco CMTS Features
Downstream channel ID—allows the CMTS administrator to assign unique downstream
channel IDs, instead of using downstream frequencies to identify CMs
Downstream frequency override—allows the CMTS administrator to change the
downstream frequency assigned to a CM, overriding the frequency set in the CM
DOCSIS configuration file
Configurable registration timeouts—allows the CMTS administrator to change the CM
registration value (the T9 timer) or reset to the default value
CM power enhancement adjustments—allows the CMTS administrator to calculate the
average value of power corrections for CMs making frequent power adjustments before
the CM actually adjusts
CM status display enhancements—supports polling CMs to obtain parameter and status
information
Enhanced per modem error counters—displays cyclic redundancy check (CRC) and
header check sum (HCS) values on a CM to identify errors
DOCSIS 1.0 service class profiles:
Service priority levels of 7 to 0
Maximum upstream rate in bps
Maximum upstream channel burst in minislot
Minimum upstream rate in bps
Maximum downstream rate in bps
to store requests from CMs or STBs with “best effort” (e.g., no minimum upstream rate)
or guaranteed-rate service queue (e.g., minimum upstream rate on the upstream channel
specified)
DOCSIS 1.0 extensions:
Multiple service identifiers (SIDs)
CM-initiated dynamic Media Access Control (MAC) messages such as Dynamic
Service Addition (DSA) and Dynamic Service Deletion (DSD) that allow dynamic
SIDs to be created at run time on a per VoIP call basis
Unsolicited grant service (e.g., constant bit rate (CBR) scheduling on the upstream
to provide a higher Quality of Service (QoS) for VoIP packets from an Integrated
Telephony Cable Modem (ITCM)
Ability to provide separate downstream rates for any given ITCM based on the
IP-precedence value in the packet
Dynamic map advance to improve the upstream throughput for a CM or STB,
enables the map advance to be dynamic and self-adjusting to propagaton delay, even
for the furthest CM on the cable plant
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