ADC CUDA 3 Administration Manual page 31

Introducing the Cuda 12000 IP Access Switch 29
DOCSIS (Data Over Cable Service Interface Specification) is a CableLabs ®
standard for interoperability between a CMTS and cable modems.
EuroDOCSIS (European Data Over Cable Service Interface Specification) is a
CableLabs ® and tComLabs ® standard.
DOCSIS and EuroDOCSIS modules serve as CMTS interface modules with
your HFC network using upstream and downstream ports. Upstream ports
support both QPSK and 16 QAM modulation; the downstream port supports
64/256 QAM modulation. Each application module has an independent
network processor and Synchronous Burst RAM. As a result, processing
power and memory scale with every module that you install in the chassis.
The route server module functions in a dual role as both a forwarding device
and a route server. The configured route server module is an egress
(non-DOCSIS) module, such as an Octal 10/100 Ethernet SpectraFlow
Module, Gigabit Ethernet SpectraFlow Module, or Packet over SONET (POS)
SpectraFlow Module.
While maintaining its original role as a forwarding module, the route server
maintains a central routing table. This module then distributes the routing
table to other application modules upon initialization, and incrementally
updates the forwarding tables as new routes are discovered. Distributed
forwarding tables on each application module provide an added level of fault
tolerance; should the Management module or another application module
fail, the existing operational modules forward traffic without interruption.
Cuda 12000 IP Access Switch CLI-based Administration Guide