Now I've finally manage to install the alarm and test it. Everything seems to work fine except for one thing. I keep getting error message on line (line failure). I have connected a GSM module and no fixed phone line is connected.
GSM-module works fine as I received an SMS on everything that happens or goes wrong. I must have changed somewhere in the menu to indicate that the center is connected to fixed telephone line! though it is not.
I'm very grateful if anyone can help me with this.