Bosch Appliances Security Camera PT-400 User Manual
Security Escort | Technical Reference Manual | 1.0 Security Escort
System Architecture
System Architecture
EN | 10
Bosch Security Systems | 6/12 | 38947D
Figure 1:
Screen Box for Password
Entry
Operations not accessible at a given
authority level appear in gray rather
than black on the central console. The
installation and maintenance portion of
the Security Escort Software is
designed to facilitate set-up and
modification of the system and to
provide rapid diagnosis of system
problems, usually with only one person
being required. From the central
console, simple commands can be used to
scan all devices on a particular
transponder for their current status.
Devices can be enabled or disabled from
the central console and the on-board
transmitter of one receiver can be
activated to test an adjacent receiver
in order to confirm that its radio
receiver section is operating properly
(buddy check).
The Security Escort Software also
continually monitors the status of each
transponder to insure it is functioning
correctly. All communications between
the central console and a transponder
require acknowledgments to verify
message integrity. Each transponder
must transmit a message periodically,
to assure the central console that the
transponder is still operating
properly. Should a transponder fail to
transmit either a routine status report
or any other message to the central
console, the central console sends a
query to the transponder requesting a
message be returned. If there is no
response after six attempts at
communications, a pop-up alert appears
on the central console.
authority level appear in gray rather
than black on the central console. The
installation and maintenance portion of
the Security Escort Software is
designed to facilitate set-up and
modification of the system and to
provide rapid diagnosis of system
problems, usually with only one person
being required. From the central
console, simple commands can be used to
scan all devices on a particular
transponder for their current status.
Devices can be enabled or disabled from
the central console and the on-board
transmitter of one receiver can be
activated to test an adjacent receiver
in order to confirm that its radio
receiver section is operating properly
(buddy check).
The Security Escort Software also
continually monitors the status of each
transponder to insure it is functioning
correctly. All communications between
the central console and a transponder
require acknowledgments to verify
message integrity. Each transponder
must transmit a message periodically,
to assure the central console that the
transponder is still operating
properly. Should a transponder fail to
transmit either a routine status report
or any other message to the central
console, the central console sends a
query to the transponder requesting a
message be returned. If there is no
response after six attempts at
communications, a pop-up alert appears
on the central console.
1.2 System Operation
The following sections describe the
basic operation of the Security Escort
System during alarm, test, and various
other routine and emergency situations.
basic operation of the Security Escort
System during alarm, test, and various
other routine and emergency situations.
1.2.1 Alarm Sequence
Transmitter
When a user of the Security Escort
System activates an alarm with the
transmitter, multiple identical packets
of digital data are transmitted from
the hand-held transmitter to nearby
receivers. Each packet contains a
unique device identification code, an
alarm type indication, the transmitter
battery condition, and a check
sequence. Multiple packets are employed
to assure successful receipt of the
message by the receivers.
Receiver
The receiver is continuously listening
for radio signals that might be alarm
or test data from transmitters. If the
incoming message is determined to be
valid, representing either an alarm or
a test from a transmitter, the peak
amplitude of the received signal is
recorded.
Transponder Scanning
The transponder continually scans all
of its receivers to see if any of them
received a valid transmission. Once a
transponder determines that one or more
of its receivers received a
transmission, it directs a message to
those receivers, to determine the
specifics of the transmission.
Receiver’s Response
The receivers respond to these messages
with the identification code of the
transmitter that sent the alarm or
test, the alarm or test type, and the
amplitude of the signal received from
the transmitter.
Transponder Data Collection and
Response
The transponder next constructs a
message for the central console
containing the receiver addresses, for
all receivers responding to the event
and signal levels of the receptions,
the alarm or test type and the
transmitter identification number. The
transponder then verifies that the
communications channel is free and
transmits the information to the
central console. If the communication
channel is busy, the transponder delays
a random period of time and tries
again.
Transmitter
When a user of the Security Escort
System activates an alarm with the
transmitter, multiple identical packets
of digital data are transmitted from
the hand-held transmitter to nearby
receivers. Each packet contains a
unique device identification code, an
alarm type indication, the transmitter
battery condition, and a check
sequence. Multiple packets are employed
to assure successful receipt of the
message by the receivers.
Receiver
The receiver is continuously listening
for radio signals that might be alarm
or test data from transmitters. If the
incoming message is determined to be
valid, representing either an alarm or
a test from a transmitter, the peak
amplitude of the received signal is
recorded.
Transponder Scanning
The transponder continually scans all
of its receivers to see if any of them
received a valid transmission. Once a
transponder determines that one or more
of its receivers received a
transmission, it directs a message to
those receivers, to determine the
specifics of the transmission.
Receiver’s Response
The receivers respond to these messages
with the identification code of the
transmitter that sent the alarm or
test, the alarm or test type, and the
amplitude of the signal received from
the transmitter.
Transponder Data Collection and
Response
The transponder next constructs a
message for the central console
containing the receiver addresses, for
all receivers responding to the event
and signal levels of the receptions,
the alarm or test type and the
transmitter identification number. The
transponder then verifies that the
communications channel is free and
transmits the information to the
central console. If the communication
channel is busy, the transponder delays
a random period of time and tries
again.