by Mirko Raimondi Introduction In today's economy, companies are looking for at cost saving measures and Clouding provides much greater exibility than older computing models. There are a lot of benets using Clouding architectures: the main benet is about the cost-eective, since you pay as you go. Another benet is the portability: an user can work from workspace, home, or at customer locations; this increases in mobility means that the employees could access to the informations from anywhere. Even if it is not widely adopted yet, VoIP cloud services open new opportunities to telecom business. When a small company wants to begin a business in VoIP telecommunications, if it choose to the traditional model, it will have to buy server equipment and to build all network infrastructure. Instead of buying and maintaining a traditional VoIP infrastructure, one could decide the alternative of Clouding where equipments are subscribed and not bought;....