GSMTEL GSM AUTO DIALLER

It is the eprom that recognizes the calling number and activate the relay.

The GSM module receives the call but never answers it.  Just lets it ring and that is all.

This means it will go from "on" to "off" for 3 sec. And then back to "on". 

If the relay is triggered, it must go from "on" to "off"  or by placing a jumper it must be momentary contact for about 3 seconds.

If the number has been memorized it will trigger the relay on the board and if it has not been memorized, nothing will take place.

When the gsm module recieves a tel. Call, the tel. Number calling must be recognized by the pcb if this number has been previously memorized in the eprom. 

The PCB. Must work like this.

The eprom must have the capacity to memorize up to 500 different telephone numbers.

The 2 wires going in is the power and the 3 coming out is the relay contacts.  "on"  "off"    "common" 

This PCB must be inclosed in a small plastic water proof container and must have 2 wires going in and 3 coming out. 

GSM House Alarm System >> GSMTEL GSM AUTO DIALLER