Installation guide

ADC Telecommunications, Inc.
16 C
HAPTER 1: HARDWARE OVERVIEW
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.
DC-to-DC converters mounted on each module down-convert the -48 VDC
power distribution and restrict power failures to a module level.
Routing Support
The route server module functions in a dual role as both a forwarding device
and a route server. The configured route server 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.
A minimum system configuration includes:
■ A single Management module.
■ A DOCSIS or EuroDOCSIS module.
■ An egress (non-DOCSIS) module, such as 10/100 Ethernet SpectraFlow,
Gigabit Ethernet SpectraFlow, or Packet over SONET (POS) SpectraFlow,
configured as a route server.