System overview
EST3 Installation and Service Manual 1.31
incoming calls), logicals, events, audio controls, etc., from a
select group of cabinets.
Feature/function domains are associated with the cabinet
providing the operator controls. In Figure 1-15, the
feature/function domain for Cabinet 1, which has the operator
controls for the first sub-net, is groups 1 and 3. The
feature/function domain for Cabinet 6, which has the operator
controls for the second sub-net is groups 2 and 3.
Figure 1-16: Routed network commands for the domain
illustrated in Figure 1-15
In Figure 1-16, the Cabinet 1 entry under the Cabinet State
column indicates that Cabinet 1 should receive from cabinets 1,
2, 3, and 4 all information about changes of state. Because
Cabinet 1 is the location of the operator controls it should send
information about reset, alarm silence, trouble silence, drill, and
acknowledgments to all the cabinets in the domain, which are
cabinets 1, 2, 3, and 4. In this example, the drill command is
common to both systems. Note, that the drill command is also
sent to cabinets 5 and 6 by Cabinet 1.
The Cabinet 2 entry under the Cabinet State column indicates
that Cabinet 2 receives its change of state information from
cabinets 1, 2, 3, and 4. Because there are no operator controls
located at cabinet 2, there is no need to send reset, alarm silence,
trouble silence, drill, and acknowledgment information to other
cabinets. As an alternative, the table could show these
commands sent to other cabinets, because they can never be
issued due to the lack of a 3-LCD display module in the cabinet.