Croatia Control, a state-owned company operating in the Republic of Croatia, providing air navigation services (ANS) is undergoing the expansion of their air traffic control facilities by adding new controller working positions to local towers (TWR) and approach centres (TMA). The project foresees a number of new consoles with special characteristics that deserve special attention in order to meet the requirements set by the customer.

SITTI is not only known worldwide as a primary system supplier and integrator of operational and technical solutions for Air Traffic Control (ATC), thanks to its large offer of reliable high-level technological Voice Communication Systems, but also for the ancillary equipment and Controller Working Position consoles for use in airfield towers and Air Traffic Control Radar and Procedural Centres.

The operator consoles by SITTI are designed taking into consideration the very important and often stressful working conditions of controllers who are tasked with a heavy and responsible workload. Therefore, they must be given the best solutions for an ergonomic and easy-to-use access to all required communication and control facilities (e.g. radars, radios, telephones). In line with these requirements, SITTI consoles are designed with high consideration for comfort- and fatigue-related factors, whilst providing efficient and effective access to equipment and services for long-term daily use.

The new consoles ordered by Croatia Control are intended for the approach centres (TMA) of Pula, Dubrovnik, Split, Zadar, Osijek and the airfield towers (TWR) of Lučko and Osijek. A total of 20 brand new specially designed consoles will be supplied this year and will become fully operative at the beginning of 2021.

The end user is at the core of SITTI’s interest when it comes to consoles. Design criteria also took into consideration such aspects as the choice of materials, seating adjustment, optimisation of viewing angles and conditions, noise isolation and ventilation, touch and feel aspects, as well as the correct positioning of communication elements (keyboards, connector panels, loudspeaker location, etc.).


The Italian Air Force is undergoing a very significant program of modernization of their Air Traffic Control systems for monitoring the national airspace. This includes the Voice Communication Systems (VCS) that are going to be replaced by brand new MULTIFONO® M800IP® systems manufactured by SITTI.

These new devices will be deployed at the main control centres, airport towers, auxiliary service rooms in order to provide the military air force with all the advanced features made available by the new systems.

These latter fully comply with the latest requirements set by the international EUROCAE ED137 standard that defines the way Voice over IP (VoIP) shall be used in the air traffic management and control fields. The large base of installed systems (both civil and military) in all continents proves the reliability and resilience of SITTI products.

Analogue, digital, VoIP connections are natively supported by the M800IP® VCS by means of interchangeable modules that can be used in different modes, only provided the proper configuration is downloaded by means of the supervision system that is also part of the supply. Remote analogue radios are interfaced to the VCS by means of appropriate gateways that make the use of such radios seamless to the military controllers.

By deploying the new M800IP® systems, the Italian air force is making a big step forward in the modernization process of their infrastructure, by enhancing communications and control over the Mediterranean Sea.



Air Traffic Control operations require highly skilled personnel, capable of properly dealing with all situations that may occur in the skies. This is the reason for which appropriate simulators are used, where operational scenarios are tested to instruct operators to correctly cope with possibly difficult and demanding situations. This is particularly important when air traffic controllers have to manage military aircrafts and their missions.

In this perspective, the Italian air force has been requesting new equipment for the radar and air defence simulator they are using to train their controllers. More precisely, the target is the enhancement of the communications systems between different systems in the Italian peninsula by realizing an integrated system capable of dealing with all types of air/ground and ground/ground communications for towers, approach centres and air defence.

SITTI is therefore about to deliver two new MULTIFONO® M800IP® systems to the Italian air force for simulation purposes. These include about 30 controller working positions (CWP), all equipped with last-generation touch-screen panel with integrated advanced features, specifically thought of to respond to the special needs of a military force.

The MULTIFONO® M800IP Voice Communication System (VCS) is equipped with the capability of simulating any kind of radio and telephone interface, thus allowing instructors to train controllers in the best possible way, as if they were living a real air traffic control experience. This significantly contributes to increase their situational awareness which will lead to a higher level of flight safety and reliable communications.

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.


Field deployable VCSs are used by military forces when they have to operate in potentially hostile areas in order to keep the airspace under control; they are also used as contingency towers when other air services are unavailable for any reason. SITTI has got a large experience in the development of such systems, thus allowing military air forces to very quickly reach the combat-ready status.

The Italian Air Force is already using field deployable VCS systems belonging to SITTI MULTIFONO® M800IP® family, which include advanced features of this top edge communication infrastructure, natively capable of interfacing a very large number of different kinds of communication links, from analogue to digital to VoIP.

The current Deployable ARS (DARS) needs to be expanded to give the possibility of interfacing a larger number of local and remote radios, telephone links. The modules that are going to be delivered to the Italian air force for this enlargement and enhancement project include

  • 13 radio interface boards, each of which capable of interfacing up to 2 analogue radios or 4 IP/VoIP radios
  • 2 radio gateway for proper connection to 4 remote VoIP radio stations each
  • 19 telephone boards for the management of 24 analogue telephone lines
  • 11 digital E1 boards

Thanks to the new modules, the communication capabilities of DARS will increase significantly, thus allowing it to give operators access to a larger amount of connection links that will allow a better surveillance of the airspace. Analogue, digital, VoIP connections coexist in an extremely flexible system of unparalleled reliability (99.9999%). Modules are interchangeable modules and can be used in different modes, only provided the proper configuration is downloaded by means of the supervision system that is also part of the supply.


Myanmar is a country where the consolidated relationship with SITTI through Samart U-Trans Co.Ltd., a Thai company, brought to the installation of a brand new MULTIFONO® M800IP® Voice Communication System at the Yangon Air Control Centre (ACC), as reported here:

The introduction of the new VCS is contributing to the development of the country, by ensuring a higher level of flight safety and reliable communications. The system also included a small simulation facility for the local Air Traffic Management Centre (ATMC).

In order to further improve the situational awareness of air operators and their prompt response to all possible events that may occur over the country, a new simulation system is going to be supplied by SITTI. This includes a number of controller working positions from which trainees can simulate the various route conditions, in order to provide a better service for safe flights.

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.


EUROCAE is the organization that deals with the definition of operational standards relating to air traffic management and control (ATM/ATC). In particular, its working group WG67 defines how to use the VOIP technology that is at the basis of ATC modern communications. Over time, this working group has assumed enormous importance in aeronautics worldwide, because it is the place where the technology that is being used throughout the world is defined.

SITTI has been a member of this working group since its foundation. SITTI proactively contributed to the outcomes of the working group, namely the international standards known as ED136, ED137 and ED138, all dealing with Voice Over IP in the field of air traffic control. SITTI has in particular been responsible for leading the subgroup responsible for the definition of the supervision of the elements in a VOIP network based on ED137.

At the latest WG67 meeting, SITTI decided to accept the role of secretary of the working group, in the person of Mr. Roberto Weger, thus further contributing to the results that this group is expected to achieve, given the new objectives set during such meeting. The ToR (Terms of Reference) for the group, overviewing the future activities to be executed in the coming years, are still to be approved by EUROCAE; the work done till now is not finished because large areas have to be taken into consideration for integration into ED137, one of all: security.

Thanks to the exceptionally good image and competence that SITTI has been able to offer and guarantee as a primary manufacturer of reliable systems worldwide, SITTI will continue providing its effective support to the group, leveraging on the large experience and expertise accumulated in the decades-long presence in the ATC market.


At the end of July 2020, AIR TECH ITALY, the first Association of Italian companies supplying products, technologies, systems and services to airports and air traffic control was established.

The Association aims at promoting the excellence and know-how of Italian industry, by creating synergies and collaborations between companies to compete in an organized and competitive manner on the market, both domestic and abroad.

“The AIR TECH ITALY association is an excellent opportunity to pool the knowledge, experience and skills of Italian companies. It represents a unique opportunity to compete on the market not as individuals, but as the Italian “country system”. Our company, SITTI, supports the creation and development of the association, as it is convinced that it can really be useful to members to increase their visibility in the world and the ability to compete, especially where and when it is necessary to have qualified partners at your side.” – Roberto Weger said, Communications Manager.

“Forms of association and networking like this are a good way to constructively blend knowledge, managerial solutions and technical skills.” – declares Alessio Quaranta, ENAC Director General – “The goal is to give concrete and comprehensive answers to the complex and multiface challenges that the aeronautical and airport sectors must face at international level.”

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SITTI is proud to announce that on July 24th, 2020, it received the CERTIFICATE OF APPROVAL for its MULTIFONO® M800IP® voice communication system from CAAC, the Civil Aviation Administration of China. The certificate states that the system “complies with the civil aviation CNS equipment certification rules (CCAR-87) and relevant provisions”.

This very important achievement has been reached with the help of the Beijing XiDi Communication Technology Ltd company that provided all required support and local knowledge. The certificate has been obtained after submitting the M800IP® VCS system to a large set of tests and after providing extensive proof of compliance to international rules and standards, including (but not limited to) ED137. This latter is the standard issued by EUROCAE for the definition of the way VoIP (Voice over IP) shall be used in the ATM field.

Mr. Giuseppe Vasquez is the SITTI Program Manager who followed all procedures and steps that led to the issue of the certificate. “This important result once more underlines the high competence of our company, capable of submitting to CAAC a product that fully passed all technical and compliance steps. CAAC requirements are comprehensibly very strict and demanding, because of the high responsibility they have to ensure voice service continuity for a safer sky over China”.

MULTIFONO® M800IP® demonstrated its built-in flexibility and adaptability, being able to pass without problems all the stringent rules imposed by CAAC to get the certificate of approval”, Mr.Claudio Tognoni – SITTI Commercial Officer for China – said.


The supply of VCS system to the Airport Authority of India (AAI) is proceeding according to the schedule. This important contract was awarded to SITTI in September 2019 (read here for more details), after a very competitive bidding process. It represents a big step towards the modernization of their Air Traffic Control infrastructure all over the country and one of the biggest successes for SITTI.

The contract is intended to serve 45 airports across the country, plus Civil Aviation Training College (CATC) and Specialized Maintenance Unit (SMU) with a large number of Voice Communication Systems (VCS) and Voice Recording Systems (VRS). The provision of the systems would have occurred in 5 lots. Two of them, covering the North-East and North region of India have already been shipped, and now it is the turn of the Western area:

  • 11 MAIN VCS Systems
  • 3 FALLBACK VCS Systems
  • 170 Controller Working Positions (CWP)
  • 22 Interfaces to Radio Remote Sites
  • 11 VRS Recording Systems

The following airports and facilities are involved (in alphabetical order):

  • Ahmedabad (main+fallback system)
  • Aurangabad
  • Bhavnagar
  • Bhopal
  • Indore
  • Mumbai ATC Complex (main+fallback)
  • Mumbai TWR
  • Nagpur (main+fallback system)
  • Rajkot
  • Surat
  • Vadodara

All systems supplied to AAI belong to the top performing MULTIFONO® M800IP® family, fully compliant to the international ED 137 VoIP standard for VoIP applications in the Air Traffic Control field.


Shaoguan is an important city in the south of China, not far from Hong Kong. With its more than 3 million inhabitants, it is the most northern city in the Guangdong province. Its enviable position makes it one of the most important cultural cities of the area.

SITTI has been supplying many Chinese cities with its Voice Communication Switching Systems (VCSS); we are very proud that Shaoguan can also be added to the long list, thus testifying the very good reputation of SITTI as a primary market leader in the Air Traffic Control field.

Through Beijing XiDi Communication Technology Co. Ltd, SITTI is having the opportunity to install a new MULTIFONO® M800IP® Voice Communication System at the Shaoguan airport. The system being commissioned is made of a limited number of controller working positions and radio/telephone/intercom facilities. Although the number of interfaces and operating positions is not very large, the supplied system has the same capabilities as larger ones. The standard ED137 Voice over IP (VoIP) statements and recommendations are implemented at all levels, thus making the Shaoguan system fully compliant to the latest technological achievements.

The system for Shaoguan is a further confirmation of the SITTI ability of scaling its systems from large ACCs with hundreds of positions to medium/small airport systems, without losing any of the standard features. Regardless of their size, all systems provide the customer with the same high quality.” – Giuseppe Vasquez, SITTI Program Manager, says.