DSC GS3060, Installation Manual, Page: 10 / 24

6
Simulated Landline Mode
The simulated landline provides the alarm control panel (with dialer interface) with a back up line in the
event of PSTN line trouble. If the voltage on the landline terminals (TIP/RNG) drops below 2.8V for a
period of between 10 seconds and 45 seconds - depending on the device connected to the T1/R1
terminals- the GS3060 switches the connected telephone device to the GSM network. After waiting
between 30 and 40 seconds, it checks the landline for one of the following:
• If the landline has been restored, the GS3060 switches the connected device back to the landline,
OR
• If the landline is still down, the GS3060 continues the simulation until the landline is restored. The
GS3060 will not switch during ongoing calls.
NOTE: When the landline is down, the GS3060 provides a dial tone to any device connected to
T1 and R1, including any telephones on the premises. The phones on the premises will not, how-
ever, be able to dial out over the GS3060.
Panel Transmission Monitoring (PTM)
The GS3060 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 GSM network. This feature is
only active when the GS3060 is configured as a back up communicator. This feature is in addition to the
regular line voltage detection.
The GS3060 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 GS3060 connects the panel to the GSM network
to communicate the events. When the GS3060 switches the line it stays in this mode until the panel
hangs up. On the next event the GS3060 restarts the error detection sequence before switching.
The GS3060 performs this sequence on any phone number that is detected on the line. Specific central
station phone numbers can be programmed into the GS3060 if desired. Up to four, 20-digit numbers
can be added to your installer profile at Connect 24. If programmed, the GS3060 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.
GPRS Sequence
• When an alarm is triggered, the control panel goes off-hook.
• The GS3060 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 GS3060 detects the DTMF dialing and stops dial tone.
NOTE: The GS3060 is unable to decode pulse dialing.
• The GS3060 sends the required Contact ID dual-tone handshake to the panel.
• After receiving the handshake, the control panel transmits an alarm message in Contact ID format.
• The GS3060 decodes and transforms the Contact ID digits into an IP packet and sends it to the
central station receiver over the GPRS network.
• The central station receiver acknowledges the alarm and sends a command to the GS3060 to gen-
erate the corresponding 1400Hz Kiss-off signal for a minimum of 800msec.
After the GS3060 generates a Kiss-off signal, it sends the next alarm or, if no further alarms need to be
sent, the control panel goes on-hook.
Inputs
The GS3060 has four inputs that can be used to trigger specific communications. These events will
transmit using Contact ID format with Inputs 1-4 reporting as [991] to [994] respectively.
Default settings are:
INPUT 1- FIRE
INPUT 3 - BURGLARY
INPUT 2 - PANIC ALARM INPUT 4 - SYSTEM TROUBLE
These inputs are normally open and will activate when a short condition is detected between the
terminal and the COM. Refer to the GS3060 Wiring Diagram (Figure 2) at the back of this manual.
NOTE: These inputs communicate using Contact ID format.
Operating Principles
firealarmresources.com