AT&T 75 - Equipment Room Design; General; Single-Section Cross-Connect Field; Typical Floor Plans

Z100-TYPE HARDWARE
EQUIPMENT ROOM DESIGN
The AT&T System 75—System Description (555-200-200) or AT&T System 7.5 XE—System
Description (555-201-200) provide equipment room specifications for temperature, humidity,
air purity, lighting levels, and grounding. They also provide information on the floor and
wall space required for the system equipment and associated peripheral equipment installed
in the equipment room. For completeness, some of the information contained in these
documents is repeated in this manual.
Typical System Equipment Room Floor Plans
General
The equipment room floor plan must be provided by the Field Services Organization (FSO)
for firm quote price lists. For all other quotes, the equipment room floor plans must be
provided by the Premises Services Consultant (PSC). Factors that influence the design are
as follows:
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Size and layout of the equipment room
Number of equipment cabinets
AC outlet locations
Size of the system.
Typical Floor Plans
Single-Section Cross-Connect Field
Figure 2-21 shows a typical single-section cross-connect field installation. The cross-connect
field is located directly behind the switch cabinet. This is the preferred cabinet and cross-
connect field location.
Figure 2-22 is a typical floor plan for a 2-carrier System 75 cabinet or a 2-cabinet System 75
XE. Figure 2-23 is a typical floor plan for a 5-carrier System 75 cabinet or a 3- or 4-cabinet
System 75 XE. The maximum capacity for a 2-carrier cabinet is approximately 200 stations.
All cross-connect fields for the 2-carrier cabinet should be handled by a single section as
shown in Figure 2-22.
The maximum capacity for a 5-carrier cabinet is 800 stations. For large systems using the
5-carrier cabinet, the size and layout of the equipment room may require that the cross-
connect field be separated into two or more sections. Also, all large systems requiring more
than 20 connector modules (480 stations) require multi-section cross-connect fields. (See
Multi-Section Cross-Connect Field for details.)
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