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Appendix 3 – Commercial Fire Sole Path Communicator Installation
Starting with the 2010 edition of NFPA 72, the TG-7FS can be utilized as the sole path for fire communications. By
following Telguard's installation guidelines, the installer can provide the best conditions for a stable, sole path
connection. In order to ensure that the cellular path to be used for signaling has the highest reliability possible, it is
necessary to confirm two additional conditions, beyond what is outlined in the TG-7 Installation Guide.
Configuring the TG-7FS
1.
Insure Optimal Signal Strength
Installation instructions for the Telguard TG-7 series indicate that a signal strength of -100dBm is sufficient. While this is
suitable for "normal" use, i.e. daily, weekly or monthly supervision, an additional level of signal integrity will minimize the
false alarms supervision failures caused by interference and atmospheric fading. Because of this, a signal strength of -
90dBm, as indicated by at least 2 ½ illuminated LEDs (LEDs 4 and 5 on, with LED 3 flashing), is the recommended
minimum for TG-7FS units installed as sole path communicators.
2.
Configure as Cell-Only
By default, the TG-7FS is configured as Telco Primary with Cellular Backup. However, if regsitered properly, the unit will
switch to Cell-Only mode during the activation process. To confirm that the unit is properly set, ensure that LED 3 is
turned off under normal conditions.
Configuring a Sole Path at the Panel
Fire panels are typically provided with two Telco connections, in order to provide multiple reporting paths. With the TG-
7FS configured as a sole path communicator, one of these Telco connections is no longer necessary for UL 864
compliance. However, the panel will continue to supervise that line unless changes are made at installation time.
There are two methods for removing supervision alarms at the panel caused by disconnecting the second Telco
connection. Either method can be used.
1.
Disabling the Second Telco Connection
Most fire panels have a configuration mechanism to disable the second Telco connection. Once the second Telco
connection is disabled, the panel will no longer supervise the connection. This is the preferred method of removing
supervision alarms at the panel caused by removal of the second Telco connection.
2.
Connecting the Telco Connections Together
The Telguard communicator is capable of providing dial tone to both Telco connections, if the Telco connections are
connected together, such that "TIP" is connected to "TIP", and "RING" is connected to "RING". The two connections will
receive dial tone in much the same way that multiple extensions in a household are connected together. If this method is
used, the installer must take care to ensure that dual path reporting is not enabled on the panel, or else simultaneous
alarm reports from the two Telco connections may interfere with each other.
When using this method, it is important to test the TG-7 device thoroughly. Make sure the panel does not report a
problem with the second line, especially when the panel is reporting to the central station. If this problem occurs, a
second TG-7 series device may be needed for connection to the second line.
LS10265-000HW-E:D 06/03/2021
TIP1
HT1
HR1
RING1
TIP2
HT2
HR2
RING2
28
56052901 – Rev B
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