Chapter 26: Connection Admission Control
STANDARD Revision 1.0 C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved. 800
Guidelines for CAC Thresholds in Converged System
The following table provides recommendations for setting allowed-normal-voice, allowed-normal-emergency-voice, and
multicast thresholds for a converged (voice and multicast) system:
Note: In a converged system, voice and multicast data are on the same channels.
Upstream
Channel BW allowed-normal-voice allowed-emergency-voice
1.28 Mbps 55% 75%
2.56 Mbps 75% 85%
5.12 Mbps 85% 90%
10.24 Mbps & greater 90% 90%
Downstream
Channel BW allowed-normal-voice allowed-emergency-voice multicast
30 Mbps 70% 20% 20%
42 Mbps 70% 20% 20%
Multicast CAC is disabled by default. To enable multicast CAC, enter:
configure cable admission-control multicast enable [no]
Use the [no] option to disable.
The default maximum value of the multicast CAC settings in a converged system is 20%.
Configuring CAC
Use the following commands to set voice limits for all downstream or upstream channels:
configure packetcable voice-limits <x> [upstream | downstream]
Where x is: allowed-normal <%bw> - Maximum% DS and/or US channel bandwidth allowed for normal voice use
allowed-emergency <%bw> - Maximum% DS and/or US channel bandwidth allowed for emergency voice use
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