Nn43021-110 02.05 Standard 30 September - Nortel 1000M Overview

36 System architecture
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CS 1000M and Meridian 1"core" processor cards support extensive
networking and provide intensive use of software features and
applications, including call centers of up to 1000 agents.
The core software architecture incorporates a real-time multitasking
operating system, as well as code that delivers features and call
processing. This architecture guarantees feature transparency to the user
upgrading the core CPU. The core architecture also provides significant
operation, administration, and maintenance enhancements for the people
who work closely with the system software and hardware.
All core overlays reside in Dynamic Random Access Memory (DRAM) after
they are loaded from the hard disk during an initial software load (software
is shipped on redundant hard disks). The Resident Overlays featured in
core-based systems ensure subsecond speeds in accessing the overlays.
The capacity enhancement in the core architecture is provided by the core
control complex. In Large Systems with cPCI Core/Network modules,
the core control complex refers to the two Core/Network modules
(Core/Network 0 and Core/Network 1). The Core and Core/Network
modules are fully redundant, with Core 1 duplicating the contents of Core
0.
The backplane in the CS 1000M MGand Meridian 1 PBX 81C CP PIVCore
modules is a compact Peripheral Component Interconnect (PCI) data bus.
PCI provides a high-speed data path between the CPU and peripheral
devices. PCI runs at 33MHz, supports 32- and 64-bit data paths and bus
mastering.
The backplane in the system is divided into "core" and "network" sides.
The "network" side allows up to eight network cards to be installed for call
processing capability.
In the CS 1000M HGand Option 51C Core/Network module, the core side
houses the following equipment:
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Communication Server 1000M and Meridian 1 Large System Overview
Copyright © 2003-2008 Nortel Networks
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the disk drive unit that provides mass storage for operating programs
and data
I/O interfaces that provide an information exchange between the user
and the system
one Call Processor (CP) card
one Input/Output Disk Unit with CD-ROM (IODU/C)
one Core-to-Network Interface (CNI or CNI-3) card
Nortel Communication Server 1000
NN43021-110 02.05 Standard
30 September 2008