LS10265-000HW-E:D 06/03/2021
4
56052901
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Rev B
Note: When the Telguard unit is configured as the Sole communications path, the Line Fault Condition
(LFC) is disabled.
No Service Condition (NSC)
A no service condition (NSC) occurs when the Telguard device is unable to register with the cellular network.
NSC can be configured to trip the supervisory relay output (STC relay) after a programmable period of time.
The STC LED will flash 4 times immediately after losing cellular service and dial-tone will cease to be
provided, independent of the STC assertion and programmed assertion delay. NSC restoral occurs
immediately after cellular service has been acquired.
Radio Communications Failure Condition (RFC)
Radio communications failure condition (RFC) occurs when the Telguard device is unable to transmit over
the cellular network even with acceptable signal strength. When RFC is declared, the STC LED will flash 5
times, dial-tone will cease, and the STC relay will trip as programmed. Restoral of this condition occurs after
10 minutes or when a message is received from the TCC.
Note: When End-to-End acknowledgement feature is enabled, a message that fails to deliver to the
Central Station will trigger an RFC condition.
Panel Presence Failure (PPF)
Panel presence failure condition (PPF) occurs when the Telguard unit is unable to detect the presence of the
alarm panel. PPF is indicated by the STC LED flashing 7 times. A supervisory report is generated and sent to
the TCC for Central Station delivery upon detection of PPF. Restoral of this condition occurs when the alarm
panel is detected as present for the selected delay time.
Note: The factory default for PPF is Disabled and needs to be Enabled for its use. For the PPF feature to
work, Tip, Ring, and the return connections for Tip and Ring must be connected between the panel and
the Telguard device.
Control Failure to Communicate (CFC)
The Control Failure to Communicate (CFC) feature is an option that allows the Telguard unit to monitor the
number of communication attempts the alarm panel makes over Telco before the Telguard unit becomes the
main path of communication. This feature works by monitoring the alarm panel from the time it goes off-
hook, and attempts to communicate, to on-hook status, and comes off-hook again. Each change in state by
the alarm panel from off-hook to on-hook to off-hook again is considered an attempt. If this continually
happens for a specified number of times within a specific time period, the TG-7 series device seizes the line
and takes over as the main communication path for the alarm panel. If the Telguard unit goes into CFC, then
it will not allow the panel to communicate via Telco again until the panel has been on-hook for 10
consecutive minutes.
Note that the CFC condition causes the Telguard device to redirect communications to the cellular channel,
but it is not indicated on the STC LED, nor does it cause either of the external relays to be tripped.
Note: The factory default for CFC is Disabled and needs to be Enabled for its use. When the TG-7 is
configured as the Sole Path, the CFC function is not applicable.
Link Supervision and Standard Line Security
In some high security commercial burglary applications, the communication path needs to be monitored
periodically. TG-7 models support those applications when Link Supervision feature is enabled. When this
feature is enabled, TG-7 models also meet the requirements for Standard Line Security (equivalent to
previously known AA Grade security) when used with a UL Listed compatible alarm panel. Once the TG-7
model is provisioned with the Link Supervision option, the TCC constantly monitors the cellular path and
sends a specific message to the central station if the path is broken or a compromise attempt is made. After
