Digital Security Controls Ltd. 17LE4010 User Manual
14
Section 6: Operating Principles
6.1 Simulated Landline Mode
The simulated landline provides the alarm control panel (with dialer interface) with a backup line in the event
of PSTN line trouble.
Note: The 3G4010/LE4010 must be programmed as a backup communicator for Simulated Landline mode to
operate.
If the voltage on the landline terminals (TIP/RNG) drops below 2.8V for a period of between 10 and 45
seconds - depending on the alarm control panel connected to the T1/R1 terminals- the 3G4010/LE4010
switches the connected telephone device to the cellular network. After waiting between 30 and 40 seconds, it
checks the landline for one of the following:
of PSTN line trouble.
Note: The 3G4010/LE4010 must be programmed as a backup communicator for Simulated Landline mode to
operate.
If the voltage on the landline terminals (TIP/RNG) drops below 2.8V for a period of between 10 and 45
seconds - depending on the alarm control panel connected to the T1/R1 terminals- the 3G4010/LE4010
switches the connected telephone device to the cellular network. After waiting between 30 and 40 seconds, it
checks the landline for one of the following:
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If the landline has been restored, the 3G4010/LE4010 switches the connected device back to the land-
line, OR
line, OR
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If the landline is still down, the 3G4010/LE4010 continues the simulation until the landline is restored.
The 3G4010/LE4010 will not switch during ongoing calls.
The 3G4010/LE4010 will not switch during ongoing calls.
Note: When the landline is down, the 3G4010/LE4010 provides a dial tone to any device connected to T1
and R1, including any telephones on the premises. The phones on the premises are not, however, able to dial
out over the 3G4010/LE4010.
and R1, including any telephones on the premises. The phones on the premises are not, however, able to dial
out over the 3G4010/LE4010.
6.2 Panel Transmission Monitoring (PTM)
The 3G4010/LE4010 can also monitor the panel’s attempt to communicate with the central station. If it determ-
ines that the panel is having difficulty, it switches the line to the cellular network. This feature is only active
when the 3G4010/LE4010 is configured as a backup communicator. This feature is in addition to the regular
line voltage detection.
The 3G4010/LE4010 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 (Contact ID kiss-off) or 2025Hz tone (SIA kiss-off) is
sent from the receiver.
Once the conditions for a failed attempt are met, the 3G4010/LE4010 connects the panel to the cellular net-
work to communicate the events. When the 3G4010/LE4010 switches the line it stays in this mode until the
panel hangs up. On the next event the 3G4010/LE4010 restarts the error detection sequence before switching.
The 3G4010/LE4010 performs this sequence on any phone number that is detected on the line. Specific central
station phone numbers can be programmed into the 3G4010/LE4010 if desired. Up to four, 20-digit numbers
can be added to your profile at Connect 24. If programmed, the 3G4010/LE4010 only looks for a Contact ID
or SIA 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.
ines that the panel is having difficulty, it switches the line to the cellular network. This feature is only active
when the 3G4010/LE4010 is configured as a backup communicator. This feature is in addition to the regular
line voltage detection.
The 3G4010/LE4010 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 (Contact ID kiss-off) or 2025Hz tone (SIA kiss-off) is
sent from the receiver.
Once the conditions for a failed attempt are met, the 3G4010/LE4010 connects the panel to the cellular net-
work to communicate the events. When the 3G4010/LE4010 switches the line it stays in this mode until the
panel hangs up. On the next event the 3G4010/LE4010 restarts the error detection sequence before switching.
The 3G4010/LE4010 performs this sequence on any phone number that is detected on the line. Specific central
station phone numbers can be programmed into the 3G4010/LE4010 if desired. Up to four, 20-digit numbers
can be added to your profile at Connect 24. If programmed, the 3G4010/LE4010 only looks for a Contact ID
or SIA 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.
6.3 Cellular Communications Sequence
When an alarm is triggered:
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The control panel goes off-hook.
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The 3G4010/LE4010 asserts a dial tone.
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The control panel dials the number of the central station. Ensure that the alarm panel inserts a minimum
one second pause, or has Dial Tone Search enabled before dialing the number.
one second pause, or has Dial Tone Search enabled before dialing the number.
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The 3G4010/LE4010 detects the DTMF dialing and stops dial tone.
Note: The 3G4010/LE4010 is unable to decode pulse dialing.
If the panel is programmed for Contact ID format:
3G4010/LE4010 Installation Manual