Communication Server Large System Installation and Commissioning

Page 38 of 456 Preparing for installation
NN43021-310 Standard 02.01 December 2007
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.