help establish comunication using ademco contact id protoco

[Abel2b]

Hello, Im new at programming I am just getting started, so can someone advise or teach me as to, how do I go about automatically answering a call,establish comunication,recieve data and passi t on to another aplication for decoding.

Protocol to establish comunication and/or sending and receiving data must be SIA ADEMCO contact-id protocol.

http://www.smartelectron.ru/files/DC-05_Contact_ID.pdf

I am writing a piece of software to monitor my home security system or any other system that uses this protocol.

I have an Idea as to how to decode and use the data what I don´t know is how to control the modem and establish comunication .

Thank you very much, any help would be greatly apreciated.