Nortel Networks 1000M warranty System equipment UEMs, UEMs are stacked in columns

Page 38 of 456 Preparing for installation

Before system equipment is delivered to the installation site, you must consider these requirements:

•Fire protection and safety requirements

•Equipment room requirements

•Grounding and power requirements

•Cable requirements

Specifications for these requirements and for developing the equipment room floor plan are provided in Communication Server 1000M and Meridian 1: Large System Planning and Engineering (NN43021-220).

System equipment – UEMs

Universal Equipment Modules (UEM) are the building blocks of the communication system. UEMs are generic metal frames equipped with covers. Each UEM is a self-contained unit with power, a card cage, I/O panels, and cable routing channels. Each UEM houses sets of equipment used in system operations (see Figure 1 on page 39).

UEMs are stacked in columns

UEMs are stacked in columns, up to four modules high. Within a column, the levels are referred to as tiers. The UEMs are numbered 0 to 3 from the bottom up (see Figure 1 on page 39). Cables connect cards in the same module, between two modules, and between cards and the I/O panel in the same module.

Column components

Each column contains a pedestal base, a top cap, and up to four modules.

Pedestals

Each column sits on a pedestal. The pedestal contains power, cooling, and system monitoring equipment.

•A Power Distribution Unit (PDU) in the back of the pedestal supplies either AC or DC power to the column.

NN43021-310 Standard 02.01 December 2007