Owner's Manual

3.1.2 Cellular Transmission
Once the signal is obtained by the TG-7FS LTE, it is encrypted (128-bit AES) and
packetized for digital delivery via the cellular network. Depending on the version of
the TG-7FS LTE unit used (Verizon or AT&T), the carrier of choice will be used. All
transmissions between the TG-7FS LTE and the TCC will occur via the best available
technology at the time, with data sessions being the primary delivery path and SMS
being the secondary option. The TG-7FS LTE can work on different bands depending
on the carrier of choice:
• AT&T supported bands: 3G B2/B5, LTE B2/B4/B5/B17
• Verizon supported bands: LTE B4/B13
Similar to the way a central station receiver operates, the TG-7FS LTE will not be
satisfied until there is an acknowledgment of receipt from the TCC. If
acknowledgment is not received by the TG-7FS LTE, a failure will be created and
annunciated via suppression of the dial tone.
3.1.3 Delivery to Central Station
After the TCC receives the data, it will process for its delivery. Based on the
subscription options chosen during the registration of the TG-7FS LTE, the TCC can
either use the captured phone number and account number to deliver the signal or
use a predetermined phone number and account number to redirect the signal. A
third option that is available to companies that have set up a connection with a
Central Station ahead of time is to use IP delivery rather than POTS to send signals to
Central Station. The TCC can deliver signals via IP using the Fibro protocol (for
Contact ID and SIA formats) to Surgard receivers, as well as using DMP protocol to
send to DMP receivers. Whether using POTS or IP for delivery, the TCC uses an
acknowledgment-based retry sequence, where it requires receiver acknowledgment.
3.2 Link Supervision for Sole Path installations
3.2.1 NFPA 72 requirement
The TG-7FS LTE unit provides a feature known as “Link Supervision” that complies
with NFPA 72, editions 2010-2016 for use a sole path communicator. Link Supervision
is a feature by which the TCC checks the unit’s connectivity and will create a signal
to be delivered to the Central Station if a disruption in service is discovered, lasting 5
minutes (per 2010 edition requirements) or 60 minutes (per 2013 and 2016 edition
requirements).
3.2.2 Link Supervision
Link Supervision must be enabled from the online portal. It will reprogram the device
to initiate check-in signals over the data network, at a frequency that is much higher
than the disruption timeout (5 or 60 minutes). If the TCC detects that there has been
no communication for the predetermined disruption timeout, it will create a signal
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