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© 2016 Telguard
General Description and Operation
The Telguard
TG-1 Express is a digital cellular radio alarm transmission
device used to provide a primary transmission path (cellular) for Household
alarm panels. When transmitting an alarm signal, the Telguard unit obtains its
data from the alarm panel by way of a telephone interface. The Telguard will
obtain all alarm signal information including monitoring station phone
number, account number and all zones for every alarm transmission. The
Telguard handshakes with the alarm panel and causes it to transmit the alarm
data. Telguard encodes the alarm data and transmits it to the Telguard
Communication Center over the cellular network. The Telguard
Communication Center performs a function similar to a central station
receiver and issues the transmission acknowledgement when the last message
in the transmission is received. After decoding and reformatting, the alarm
signal is routed over the telco line (Public Switched Telephone Network -
PSTN) or via the Internet (IP) to the appropriate alarm company central
station for action.
In a typical alarm installation, Telguard Digital TG-1 Express is installed in
the same area as the host alarm system and is connected directly to the host
alarm panel via the Telguard’s RJ-45 jack in the normal fashion. Two
programmable System Trouble Condition (STC) relays are available for
connection to the host control/communicator's trip zone input terminals in
order to provide Telguard trouble signals to the alarm panel. Additionally,
automatic self-test and remote query signals are transmitted exclusively over
the cellular network to the Telguard Communication Center. The TG-1
Express receives operating power form the host alarm panel, and all cellular
monitoring and supervisory functions are built in. No extra modules are
required.
The UL Listed equipment at the Telguard Communication Center (TCC) plays
a key role in the operation of every Telguard. All Telguard units are required
to use the Communication Center because of the alarm panel alarm signal
format encoding and decoding requirements used in packet-data transmissions
over the digital cellular network. The Communication Center also manages
the real-time databases for cellular service and a complete history of every
Telguard unit’s operating conditions. These conditions include programming
setup information, alarm transmission information, supervisory trouble
information, status information, and automatic self-test information.
