Nortel Networks NN43021-110 - Manual (Page 38)

38 System architecture
• 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
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 MG and Meridian 1 PBX 81C CP PIV
Core 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 HG and Option 51C Core/Network module, the core side
houses the following equipment:
• 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
In the CS 1000M SG and Meridian 1 PBX 61C CP PIV Core/Network
module, the core side houses the following equipment:
• one Call Processor Pentium IV ® (CP PIV) card
• one System Utility (Sys Util) card
Nortel Communication Server 1000
Communication Server 1000M and Meridian 1 Large System Overview
NN43021-110 01.03 Standard
Release 5.0 18 February 2008
Copyright © 2003-2008, Nortel Networks
.