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Operating principles
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 3G4010CF/LE4010CF 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
3G4010CF/LE4010CF 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:
•
If the landline has been restored, the 3G4010CF/LE4010CF switches the connected device back
to the landline, OR
•
If the landline is still down, the 3G4010CF/LE4010CF continues the simulation until the landline is
restored. The 3G4010CF/LE4010CF will not switch during ongoing calls.
Note: When the landline is down, the 3G4010CF/LE4010CF 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 3G4010CF/LE4010CF.
Panel transmission monitoring (PTM)
The 3G4010CF/LE4010CF 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 cellular network.
This feature is only active when the 3G4010CF/LE4010CF is configured as a backup communicator.
This feature is in addition to the regular line voltage detection.
The 3G4010CF/LE4010CF 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 3G4010CF/LE4010CF connects the panel to
the cellular network to communicate the events. When the 3G4010CF/LE4010CF switches the line
it stays in this mode until the panel hangs up. On the next event the 3G4010CF/LE4010CF restarts
the error detection sequence before switching. The 3G4010CF/LE4010CF performs this sequence
on any phone number that is detected on the line. Specific central station phone numbers can be
programmed into the 3G4010CF/LE4010CF if desired. Up to four, 20-digit numbers can be added
to your profile at Connect 24. If programmed, the 3G4010CF/LE4010CF only looks for a Contact
ID or SIA kiss-off after these numbers are dialed. A Telephone Line Monitoring trouble (PGM
output activation or reporting code if applicable) is also activated or transmitted when the PTM is
activated. A restoral is sent at the end of the call.
Cellular communications sequence
When an alarm is triggered:
•
The control panel goes off-hook.
•
The 3G4010CF/LE4010CF asserts a dial tone.
•
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.
•
The 3G4010CF/LE4010CF detects the DTMF dialing and stops dial tone.
3G4010CF / LE4010CF Installation manual
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