PRIORITY ORDERING OF ALARM QUEUES

TM 5-6350-275-24&P

1-22. PRIORITY ORDERING OF ALARM QUEUES. The order in which alarms are maintained within each queue is

determined by: first, whether or not they have been deferred; second, whether they have been acknowledged; third, their

assigned priority levels; and, finally, their age. Undeferred alarms are given precedence over deferred alarms.

Unacknowledged alarms have a higher priority than acknowledged alarms. Alarms with the highest priority levels are

given precedence over those with lower levels. If two alarms share the same priority, precedence is given to either the

oldest or most recent alarm, as defined during the creation of the database.

1-23. AUDIO ASSESSMENT. When a sensor detects an intruder, the system will automatically open a channel to the

nearest microphone, turn on a Closed Circuit Television (CCTV) camera and display it on a monitor, and generate an

alarm. In addition, the incident will be automatically recorded on the Video Cassette Recorder (VCR). No operator

intervention is required.

If someone at a remote location wants to speak to the operator, he or she can pick up a handset (if available) and an

alarm is generated at the operator workstation, informing the operator of a communications request.

1-24. BLOCK DIAGRAMS/PRINCIPLES OF OPERATION.

a. Primary Monitor Console (PMC). Foldout FO-1 shows the breakdown of the PMC, a typical RSM.

and a typical RADC area. The CPU is connected to the operator workstation by a Local Area Network

(LAN) cable. The system is expandable to 22 workstations. The information used to address each

RADC is entered at the operator workstation and down loaded into memory. With the data

communication auto/manual switch as shown, the PMC is in control of all RADCs through the poll ports,

and the Intelligent Line Multiplexed Concentrator. The communications between the CPU and the PMC

communications module is at 9600 baud, while the communications subsystems polls the RADCs at

1200 baud. The RSMs are tied to the system through the anti-poll ports. In this configuration, if the

PMC fails, the RSMs will automatically assume the responsibility for the RADCs being handled by the

CPU. Each RSM can handle up to 256 RADCs.

The PMC also provides a tie-in to the ECE enrollment terminal which enables the operator to verify

enrollment of personnel via the IAC. A local RADC at the PMC will support entry/exit to the PMC and

any local intrusion detection devices. Also located at the PMC is the audio assessment/intercom and

CCTV switching units, and their associated monitors. The Audio Communication Switcher allows for

switching between audio listening devices and the intercom phone. The Video Switcher allows for

switching between an array of TV cameras to any of its associated monitors. switching between the

CCTV cameras, VCR, and its associated monitor.

b. Data Communications Interface. The ICIDS Data Communication Interface, shows the PMC to

RSM link in addition to the PMC end of the direct data link to the RADCs (see Figure 1-23). One of two

Data Communications Expanders (DCX) is shown with the poll (P) and auto/manual switch to the RSMs.

Each DCX contains its own communications processor and memory which, in turn, communicates with

the CPU, which relieves the CPU of this communication burden.

The communication processor in the PMC DCX polls the RADCs for data and stores it in its local

memory. This memory, in turn, is polled by RSM 1 for this data and updates its own DCX memory

which, in turn, is polled by RSM 2 for the same data. With this configuration, both RSM 1 and 2 contain

the status of the RADCs and can be monitored at any time for status. Up to 8 RSMs can be tied together

in this manner. Through this same communication channel, the RSMs can be assigned to take over

control of their areas at any time. The PMC will still be updated via its DCX. If the PMC should fail, the

auto/manual switch will switch, so the PMC is bypassed, and allows the RSMs take over the direct data

link to the RADCs. This same type of switching function can take place at RSM 1, allowing RSM 2 to

also take over for RSM 1. This configuration of the PMC and RSMs assures that no single point of

failure will cause a system-wide failure. By the use of the second DCX at the PMC and RSMs and

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