Orchestra allows complete scalability without the need of software replacements. Updates and functionalities can be added with a simple click from the web interface without the help of a specialized technician. The architecture allows the implementation of new special or non standard functions, making them available as new applications without intervening on the hardware system. Security is a very important aspect in a Unified Communication platform. Orchestra has password protected access at all levels, for example to the voice mail, to the user’s interface, to service activations, to outbound or international calls, and so on. The support to the LDAP and Active Directory protocols allows the integration of the access control with the existing IT infrastructure of the company, thus improving and simplifying the daily security management.