56050301 – Rev B
1
© 2017 Telguard
G
ENERAL
D
ESCRIPTION AND
O
PERATION
The Telguard
model TG-4 is a digital cellular radio alarm transmission device used to provide a
primary or back-up transmission path (cellular) for alarm panels. Depending on the TG-4
configuration (determined at time of installation), the alarm panel will use the PSTN line or cellular
as primary or back-up (secondary) transmission path to deliver alarm messages. When it is
configured as a backup, it will provide transparent access from the alarm panel to the central
station. When transmitting an alarm signal using the cellular path, the Telguard obtains its data
from the alarm panel by way of a Telco line 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 causing it to transmit the alarm
data. The Telguard encodes the alarm data and transmits to the Telguard Communication Center
(TCC) over the digital cellular network. The TCC 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 to the appropriate alarm
company monitoring station for action.
In a cellular back up alarm installation, the incoming Telco line is connected from the premises’ RJ-
31x jack to the Telguard and then from the Telguard's RJ-45 jack to the alarm panel. Two
programmable System Trouble Condition (STC) relays provide supervisory trip outputs for
connection to the alarm panel’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 with all Telco line and cellular monitoring,
switching and supervisory functions built in. No extra modules are required. The Telguard TG-4
has its own power supply which keeps the Telguard battery charged. In addition, the TG-4 has an
optional connection to receive its operating power from the host alarm panel (eliminating the need
for the adapter/battery connections).
The UL Listed equipment at the TCC plays a key role in the operation of every Telguard. All
Telguard units utilize the TCC due to the panel alarm signal format encoding and decoding
requirements used in packet-data transmissions over the digital cellular network. The TCC also
manages the real-time databases for cellular accounts and a complete history of every Telguard’s
operating conditions. These conditions include programming setup information, cellular alarm
transmission information, supervisory trouble information, remote query information, and automatic
self-test information.
F
EATURES
This section summarizes the key features of the Telguard TG-4.
O
PERATING
M
ODE
The Telguard is a digital cellular data/SMS transmission device that is installed at the protected
premises to provide alarm transmission for security systems. The Telguard TG-4 transmits alarm
signals over the nationwide digital cellular network if the telephone line or data network has been
disrupted, compromised or when there is no wire line service available.
M
ULTIPLE
A
LARM
F
ORMAT
S
UPPORT
Telguard TG-4 default program setting is for Auto Detection of the panel alarm format. Auto Format
Detect feature allows the Telguard to adapt to receive any listed format on every alarm
