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Security Escort | Technical Reference Manual | 1.0 Security Escort
System Architecture
EN | 12
Bosch Security Systems | 6/12 | 38947D
Multiple Alarms
Receivers can handle multiple separate
alarm or test events at the same time.
If the receiver’s event buffer is full
but contains test events, it discards
the test records in favor of an
incoming alarm. Similarly, the
transponder event buffer can hold
multiple events and it also replaces
test events with alarm events when its
buffer is full.
To assure that simultaneous alarms are
detected, the multiple identical
packets sent by the transmitters are
randomly spaced over approximately one
second. Only one of the packets must be
detected to produce an alarm. Thus a
collision between the transmissions of
two or more transmitters is virtually
eliminated. In addition, unless the
transmitters are in the same location,
they detect different groups of
receivers. The central console is
capable of processing 30 concurrent
alarms. When there is more than one
active alarm, the central console
displays data for the first to be
received and also indicates the total
number received and the identity of the
individuals transmitting them. The
operator can click on the name of an
individual to see the data for a
particular alarm.
1.2.2 Test Sequence
Transmitter
When the user of the Security Escort
System activates a test transmission,
multiple identical packets of digital
data are transmitted. In this case, the
digital data in the transmitted packets
contain a test code rather than an
alarm code.
Receiver
The receiver responds to a test
transmission the same as to an alarm
transmission by decoding the radio
signals, and measuring signal levels.
Transponder Data Collection and
Response
The transponder collects data on a test
event in the same manner as for an
alarm event, it does not command the
LED (green for test confirmation) to
flash until it has been commanded to do
so by the central console. Transmitters
not in the Subscriber Database, or in
the database, but disabled, do not
receive a flashing green light or
flashing strobe that would indicate a
successful test.
Central Console Response
The central console responds to the
report of a test from a transmitter by
collecting the data from each
transponder reporting the event, and
recording the locations of the
receivers that detected the
transmission. In this case, however, it
does not calculate a location estimate.
It simply records the data on the
primary and backup computers’ hard
disks, prints the identity of the
subscriber, date and time on the
hardcopy printout, and displays generic
test icons on the central console in
positions corresponding to the
locations of receivers hearing the
transmission.
In the case of test transmissions from
Security Transmitters or Watchman
Transmitters, the central console
determines the closest receiver to the
transmission and creates a guard tour
event which becomes a part of the Guard
Tour Report.
Figure 3: Console Screen Showing
test Icons
Operator’s Response
There is no response required of the
operator in the case of a test
transmission.