Specifications

SATEL GSM LT-1 5
must be activated in the SIM card installed in the module, if the module is to use the
functions requiring the GPRS technology.
4 - LEDs (see: section „LED indicators”):
 STAT LED indicate the module status,
 SIG LED indicate the level of antenna signal received by GSM telephone,
 TX and RX LEDs indicate that data are being transferred through the RS-232 port.
5 - RS-232 port.
Description of the terminals:
+12V – power supply input (12 V DC ±15%)
GND – common ground
FLT – OC type output to indicate a problem with login to the GSM network. It
activates after about 10 minutes after occurrence of the problem. If active, it is
shorted to the common ground. It remains shorted to the common ground until
the cause of the trouble disappears. The problem with login to the GSM
network may be caused by:
– missing SIM card,
– entered invalid PIN code,
– missing or defective antenna,
– non-availability of GSM service (out of range),
– telephone defect.
Detailed information about the trouble is provided by the on-board LED
indicators (see: section „LED indicators”).
The output can be connected to a control panel zone or it can directly control
operation of the relay.
R-1, T-1 – telephone line output (connection for alarm control panel, telephone set or
another device provided with telephone dialer).
When making a telephone call, the module changes the DC voltage polarization on
telephone line output (T-1 and R-1 terminals), thus enabling individual charging of the
phone calls.
3.2 LED INDICATORS
Shown graphically below is how information is presented by the LED indicators. Each lighting
scheme covers about 4 seconds and is repeated after 1 second pause (
– LED is OFF;
– LED is ON).
STAT indicates the module status:
– (LED off) module power off,
– normal operation of module,
– no communication with GSM telephone,
– invalid PIN code,
– no PIN code,
– no SIM card,
– PUK code required,
– PH-SIM PIN code required,
– PIN2 code required,