In response to the increasing air traffic in the Brazilian skies and the related complexity of operations, the Brazilian air force (FAB – Forza Aerea Brasileira) decided to undergo a significant plan for upgrading the existing VCS (Voice Communication Systems) infrastructure already deployed nationwide. The upgrade is aiming at getting the many advantages of the VoIP architecture and protocol. The conversion to IP is the main objective that is being focused with this project. Other projects in the same direction have been completed in recent years, while the current one directly involves the DTCEA (Destacamentos de Controle do Espaço Aéreo) areas of San Paolo, Rio de Janeiro (Galeao) and Confins.

A large number of BSS (Best Signal Selection) modules are going to be installed for the management of a varying number of remote sites (from 2 to 7), to allow air traffic controllers to receive the best audio from remote radio stations nominally set to the same frequency. When considering the total amount of connections (main + emergency systems) that will be interfaced by the VCSs, one may understand the complexity and wideness of the requirements set to SITTI systems:

  • 100 Best Signal Selection (BSS) frequency groups
  • 200 Controller Working Positions (CWP)
  • 360 SIP telephone connections
  • 560 Analogue telephone lines
  • 500 Analogue-IP gateway boards

These impressive figures do not represent a problem for SITTI MULTIFONO® systems, because of their intrinsic capability of managing a very large number of concurrent communications, since they are natively ready to accommodate expansions and integrations without affecting ongoing operations. Air traffic controllers can access all communication devices (radio and telephone) that are configured on their touchscreen panels, by taking full advantage of the sophisticated algorithms implemented in the system to provide them with the easiest and most effective Human-Machine Interface for safely coping with all the tasks they are responsible for.

Once the VCS systems will have been upgraded according to the requirements set by the customer, the existing VCS systems will benefit from all the positive aspects introduced by the IP technology to better respond to the constantly changing and challenging operational needs. The wide experience of SITTI in the Air Traffic Control (ATC) field is put at disposal of the customer through top-edge systems, in compliance with international standards. The upgrade of the VCSs will be carried out in different phases, and it is expected to be completed in 2 year time.


ARMATS, the Armenian Air Navigation Service Provider, awarded SITTI the supply of a new emergency Voice Communication System (VCS) to be installed in ARMATS Emergency Centre nearby ZVARTNOTS Yerevan International Airport. The new system complements the main system, also supplied by SITTI about 8 years ago and currently in full use.

The new emergency system belongs to the MULTIFONO® M800IP® VCS family and encompasses 28 analogue radio channels, 66 analogue telephone lines and 3 controller working positions, together with VoIP ED 137 features for future expansion. The excellent performance of SITTI VCS systems guarantees an extremely high availability ratio (above 99.9999%) thanks to the duplicated connection to all system parts, thus greatly enhancing reliability and resilience to adverse operational scenarios.

The supplied system to Yerevan underlines the trust that all Caucasian countries put in the Italian manufacturer. In fact, neighboring countries are also profitably using SITTI systems for their air space control needs. The top-edge characteristics of the supplied systems contribute in making the skies over this vital transit region safer for the constantly increasing number of travelers to and from Europe and Asia.

SITTI is a primary VCS manufacturer and supplier worldwide, capable of giving prompt and top edge solution answers to Customer needs, both in the Civilian and Military fields. The leading edge, redundant, non-blocking architecture of the MULTIFONO® M800IP® provides flexibility and modularity for easy expansion and addition of further functionalities.


SITTI is a world leader in Air Traffic Control (ATC), focusing on Voice Communication Systems (VCS) and ancillary equipment. The company has got a very large and strong market position in Turkey, where it has had a preminent leading position in several projects, like SMART and the new IGA airport.

During the past 20 years, a large number of analog and VoIP VCS systems of medium to large capacity have been installed and put into operation for the Turkish State Airports Administration (DHMI). These include the Air Traffic Control Center and the majority of the country’s airports, plus a large amount of remote radio sites. Turkey has therefore become strategic to SITTI; a further expansion in this area is expected in the near future.

In order to consolidate and expand its strong market share in the territory and better meet the customer needs, SITTI decided to establish a new subsidiary company in Turkey under the name of “SITTI-TURKEY ATC COMMUNICATION İLETİŞİM HİZMETLERİ LİMİTED ŞİRKETİ” (also simply called “SITTI TURKEY“), based in Ankara and managed by Mr.Okan Atak.

Among the promising projects expected to be carried out in the near future, the modernization and upgrade of the existing VCS systems and the supply of voice recorders. This will allow the Turkish State Airports Administration to upgrade the current systems to the latest top-edge technical achievements to provide a more reliable and efficient service to airlines, thus making the routes between Europe and Asia even more safe.