System Equipment - Uems - Nortel Meridian 1 Succession 1000M Installation And Configuration Manual

Page 20 of 376 Preparing for installation
System equipment – UEMs
UEMs are stacked in columns
553-3021-210 Standard 1.00
Universal Equipment Modules (UEMs) are the building blocks of the
communications system. Each UEM is a self-contained unit with power, a
card cage, I/O panels, and cable routing channels. It is a generic case
containing sets of equipment used in system operations (see Figure 1 on
page 21).
UEMs are stacked in columns, up to four modules high. These UEMs are
numbered 0 to 3 from the bottom up (see Figure 1 on
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
monitoring equipment.
• A Power Distribution Unit (PDU) in the back of the pedestal supplies
either ac or dc power to the column.
• A System Monitor checks the column's cooling and power systems.
• A blower unit (accessible from the front of the pedestal) forces air up
through the modules to cool the circuit cards.
October 2003
page 21). Cables