SATEL GSM-4/GSM-5
9
socket for connecting SM-2 voice synthesizer
.
RS-232 port
.
jack for external
power supply unit
.
telephone line output socket
(for connection of alarm control panel, telephone set or
another device provided with telephone dialer).
telephone line input socket
(analog PSTN line).
sounder
.
Fig. 7. View of GSM-4 module electronics board.
4.2 LCD display
The integrated display allows you to read information about the module current status.