Chapter 28: PacketCable™ Services and Voice Applications
STANDARD Revision 1.0
C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved.
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Octet counts per gate
Commit time accumulation
Time and volume-based gate-state-report triggers
Event messaging
Multiple sub-flow per flow
Call Admission Control (CAC) for PCMM, including full PCMM session class ID support.
PCMM Classification for Remotely Connected Subnets
Feature Application and Overview
Cable operators have been successfully leveraging the PacketCable™ Multimedia (PCMM) architecture to deliver new
services using dynamic quality of service on the DOCSIS® channels. This feature adds the ability to offer PCMM-based
services to CPE IP addresses that are remotely connected (i.e., behind another router) to the cable interface of the C4/c
CMTS. Prior to this feature, PCMM-based services would only work for CPE IP addresses that were directly connected to
the C4/c CMTS.
PCMM for remotely connected subnets is useful for operators who have subscribers with routers behind or embedded
within the cable modem. Using a cable modem with an embedded router for business services is a particularly interesting
use case for this feature. ARRIS and other CM/EMTA manufacturers have a cable modem feature that allows operators to
configure the modem as a simple router with the remote subnet provisioned in the cable modem configuration file. The
cable modem then uses a dynamic routing protocol—typically RIPv2—to advertise the remote subnet back to the C4/c
CMTS. Operators can use this cable modem feature to statically assign an IP address (or range of IP addresses) to a
subscriber with the benefit that the IP address(es) will seamlessly migrate with the subscriber across C4/c CMTSs during
HFC topology changes.
If an operator uses this solution, the CPE IP address is regarded by the C4/c CMTS as a remotely connected subnet because
the CM acts as a router. If the operator needs to provide PCMM-based service(s) to the CPEs, the C4/c CMTS must support
PCMM for these remotely connected subnets in order to provide the service.
An C4/c CMTS that supports PCMM for remotely connected subnets can be used in conjunction with a cable modem with
embedded router to enable operators to deploy PCMM-based business services more effectively. MSOs can use statically