7
Operating Modes
Simulated Landline Mode
The simulated land line mode provides the fire alarm control panel (with dialer interface) with a
communication path for standalone type applications (Wireless network being the sole communication
technology used) or for back-up type applications (where two communication technologies PSTN and
wireless are used).
In applications where the 3G3070-CF is also connected to the telephone line (back-up configuration),
if the voltage on the land line terminals (TIP/RNG
TIP/RNG
TIP/RNG
TIP/RNG
TIP/RNG) drops below 2.8V for a period of 10 to 45 seconds
(depending on the device connected to the T1/R1
T1/R1
T1/R1
T1/R1
T1/R1 terminals), the 3G3070-CF will switch the connected
alarm control panel to the wireless Network for approximately 30-40 seconds. At the end of this interval,
it will check the land line and do one of the following:
• if the land line is restored, it will switch the connected alarm control panel back to the land line;
• if the land line is still down, it will continue to simulate the land line until it is restored. The 3G3070-CF
will not switch during ongoing calls.
Panel Transmission Monitoring (PTM)
The The 3G3070-CF can also monitor the panel’s attempt to communicate with the central station. If it
determines that the panel is having difficulty, it switches the line to the wireless network. This feature is
only active when the 3G3070-CF is configured as a back up communicator. This feature is in addition to
the regular line voltage detection.
The 3G3070-CF monitors the phone line for four consecutive failed attempts within a 12-minute window.
A failed attempt is assumed to have occurred when a line seizure takes place during dialing (either the
alarm panel or the customer telephone), but no 1400Hz tone (or Contact Kiss-off) is sent from the
receiver. Once the conditions for a failed attempt are met, the 3G3070-CF connects the panel to the
wireless network
to communicate the events. When the 3G3070-CF switches the line it stays in this mode until the panel
hangs up. On the next event the 3G3070-CF restarts the error detection sequence before switching.
The 3G3070-CF performs this sequence on any phone number that is detected on the line. Specific
central station phone numbers can be programmed into the 3G3070-CF if desired. Up to four, 20-digit
numbers can be added to your profile at Connect 24. If programmed, the 3G3070-CF will only look for
Contact ID Kiss-off after these numbers are dialed. A Telephone Line Monitoring trouble (PGM output
activation and/or reporting code if applicable) is also activated and/or transmitted when the PTM is
activated. A restoral is sent at the end of the call.
Wireless Communication Sequence:
•
When an event is triggered, the alarm control panel dialer goes off-hook
•
The 3G3070-CF will assert dial tone
•
The Alarm Control Panel dials the number of the central station. Ensure the alarm control panel
inserts a 1-second pause (minimum), or has dial tone search enabled before dialing the number
•
The 3G3070-CF detects the DTMF dialing and stops the dial tone
NOTE: The 3G3070-CF is unable to decode pulse dialing.
•
The 3G3070-CF will send the required Contact ID dual tone handshake to the alarm control panel
•
After receiving the handshake, the alarm control panel transmits the event alarm message in
Contact ID format
•
The 3G3070-CF decodes and transforms the Contact ID digits into an IP packet and sends it to
the Supervising Station Receiver over the wireless network
• The receiver acknowledges the received event and sends a command to the 3G3070-CF to
generate the corresponding 1400Hz kiss-off signal for 800ms minimum
• After the 3G3070-CF generates the kiss-off, the alarm control panel sends the next event or goes
on-hook if no more events need to be sent.
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