Introduction
555-230-024
1-12 Issue 5 January 1998
■ The Expansion Port Network cabinet, which contains:
— Additional ports
— Interfaces to the Processor Port Network cabinet and other
Expansion Port Network cabinets
— Maintenance interface
— Components of a Center Stage Switch (optional)
■The auxiliary cabinet, which contains equipment used for opti onal
system-related hardware
Control, duplicated control, expansion control, port, and switch node carriers ca n
be installed in multicarrier Processor Port Network and Expansion Port Netwo rk
cabinets. (See the descriptions of these carriers in the previous sectio n "Sin-
gle-Carrier Cabinets".)
For more detailed hardware information, see the

DEFINITY ECS Release 6 Sys-

tem Description Pocket Reference, Issue 2,

555-230-211.
Standard Configurations
The DEFINITY ECS hardware can be configured in a variety of ways, depending
on the number of endpoints the switch serves and the number of circuit packs
required to connect the endpoints.
Figure 1-7 shows the five main system configurations .