Hardware architecture 47

Meridian attendant consoles support attendant message center options. The attendant console can be connected to a PC to provide electronic directory, dial-by-name, and text messaging functions. All call processing features can be accessed using the computer keyboard.

Power equipment

Large Systems provide a modular power distribution architecture.

Each column includes:

a system monitor that provides:

power, cooling, and general system monitoring capabilities

error and status reporting down to the specific column and module

circuit breaker protection

a cooling system with forced air impellers that automatically adjusts velocity to meet the cooling requirements of the system

backup capabilities

Each module includes:

an individual power supply unit with shut-off (switch or breaker) protection

a universal quick-connect power wiring harness that distributes input voltages and monitor signals to the power supply

All options are available in both AC-power and DC-power versions. The selection of an AC- or DC-powered system is determined primarily by reserve power requirements and existing power equipment at the installation site.

Although AC-powered and DC-powered systems have different internal power components, the internal architecture is virtually identical. AC- and DC-powered systems differ primarily in the external power components.

AC power

AC-powered systems require no external power components and can plug directly into commercial AC (utility) power. AC-powered systems are especially suitable for applications that do not require reserve power. They are also recommended systems that require reserve power with backup times ranging from 15 minutes to 8 hours.

If reserve power is required with an AC-powered system, an Uninterruptible Power Supply (UPS), along with its associated batteries (either internal or external to the unit), is installed in series with the AC power source (see Figure 17 "ExternalAC-power architecture with reserve

Nortel Communication Server 1000

Communication Server 1000M and Meridian 1 Large System Overview

NN43021-110 02.05 Standard

30 September 2008

Copyright © 2003-2008 Nortel Networks

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Nortel Networks NN43021-110 manual Power equipment, AC power