GSM LT-1
SATEL
7
If the first four digits of the dialed number correspond to the pre-programmed „
pager station
number
”, the module goes to the procedure of receiving the alphanumeric message and
sending it as an
SMS text message
(see section „Sending SMS messages”). Checking of
the first four digits is always performed.
When connection is established by the cellular telephone, the module will transmit LF audio
signals between the extension line T-1, R-1 terminals and the cellular telephone. After the
handset is lifted by the subscriber the connection is established with, the module changes the
direct voltage polarization across the extension line terminals T-1 and R-1. This function
makes it possible to keep individual tariffication of phone calls.
An option is provided for calling the phone number of the module SIM card. The
incoming
calls
are directed to the extension line terminals R-1 and T-1, which generates the ringing
tone, in much the same way as with operation of the cable telephone line. It is then possible
to answer the incoming calls by means of a stationary telephone set connected to that
telephone line.
7. GSM
LT-1
WITH MONITORING STATION
Figure 4.
The GSM LT-1 module permits site monitoring by means of SMS short text messages. This
function is offered by the STAM-1 monitoring station program, version 4.07 and STAM-2,
manufactured by SATEL. The example of module connection to station is shown in Fig. 4.
Connect the GSM LT-1 module to the computer serial port (COM1 or COM2), by means of
the typical cable for programming the GSM module as well as CA-10, CA-64 or INTEGRA
control panels (see: Fig. 6).
To make the module interface with the monitoring station, you must enter during setup
the communication code, by default 111111. The contents of SMS-messages and the
