56044702 1 © 2012 Telular Corporation
General Description and Operation
The TelguardTG-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
transmits a Link Request to the Telular Communication Center and,
when a link acknowledgement is received, 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 Telular Communication
Center over the cellular network. The Telular 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) 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. One programmable System Trouble Condition (STC) relay is
available for connection to the host control/communicator's trip zone
input terminals in order to provide a Telguard trouble signal to the
alarm panel. Additionally, automatic self-test and remote query signals
are transmitted exclusively over the cellular network to the Telular
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 Telular 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
