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.


SITTI has been awarded the supply of a brand new Voice Communication System (VCS) to be installed at Prishtina, Kosovo. The end user is the local air traffic management organization, ANSA (Air Navigation Service Agency), through a local system integrator company named TELELINK, based in the Republic of Macedonia.

The system being supplied by SITTI belongs to the MULTIFONO® M800IP® family, which is compliant to the most recent technical achievements and requirements set by the word famous ED-137 standard, developed by EUROCAE. It is a medium-sized system, capable of interfacing both analogue and digital radio and telephone channels and links. More specifically, the initial supply includes the possibility of interfacing 20 analogue telephone links and 28 VoIP (Voice over IP) radio channels. All the operators can have simultaneous access to all these resources from their Controller Working Position (CWP).

The presence of SITTI in the Balkan area is gradually increasing, thanks to the excellent reputation that SITTI has gained in the past decades all over the world and especially in this area, where other countries are also experiencing the completeness, reliability and performance characteristics of the MULTIFONO® system.

SITTI is a primary VCS manufacturer and supplier worldwide, capable of giving prompt and top edge solutions 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, conformant to the ED 137 standard.

Telelink, with its global network spanning across 10 countries and 17 years experience provides a wide range of innovative services and solutions for network infrastructure services, system integration, security and automation, smart cities, R&D and education


Italy is a full member of NATO and cooperates in keeping the control over the National skies in the frame of a multilateral defence system. As technology improves, even the military assets shall be upgraded in order to cope with new features and to be able to respond to any threat in the shortest time possible. Communications play here a fundamental role.

The NATO ACCS (Air Command and Control Systems) in Italy has the increasing need of integrating existing communication links with the latest technological achievements, without losing the overall capability of simultaneously accessing different kinds of networks connecting current TDM (Time Division Multiplexing) devices and more modern VoIP (Voice Over IP) equipment.

The existing VCS (Voice Communication System) deployed at the air defence centres have therefore to be upgraded to accommodate and fully integrate ISDN links and IP connections to provide military operators access to all facilities and services offered by the communication radio and telephone devices installed at different sites on the Italian National territory.

Integration of different technologies is a task that is very common in the civil Air Traffic Control field. Military installations have additional priorities and need special further features that are specific to the task of providing an efficient and effective defence to a Nation. Among these, the capability of properly dealing with clear and encrypted (black/red) voice and data streams.

Italy is currently undergoing an upgrade of its military control centres in order to put together all the above-mentioned functions, under the coordination of NATO and its modernization and improvement programs like NATINAMDS.

Through the consolidated architecture of SITTI MULTIFONO® M800IP® VCS family, SITTI is capable of supporting the integration and transition to VoIP in a very smooth, efficient and effective way, thus ensuring military advanced features and full reliability of their systems.



Dara Sakor is an area along the coast of Cambodia that is undergoing an extensive development. Due to the important drivers for the economy of the area, including the attractiveness of the touristic offer, new investments are foreseen. The nearby airport is going to be enlarged and potentiated to cope with an expected increased traffic volume. Tourism is an important driver of the economy in the region, and therefore appropriate investments are planned to sustain the demand for easy reachability of the local resorts.

The supply of a new Voice Communication System (VCS) has been awarded to SITTI, through SAMART Corp, for the local management of the air traffic. The system encompasses 4 controller working positions connected to 10 tx/rx VOIP radio channels and 10 analogue telephone lines, although the intrinsic flexibility of the architecture of SITTI systems allows to add new positions and/or interface boards without any disruption to the ongoing data and voice traffic.

The active contribution given by SITTI to the development and standardization of the EUROCAE ED-137 world standard on VOIP in ATM (Air Traffic Management) guarantees the customer of a complete adherence of SITTI systems to the latest available document requirements, further confirmed by the large base of installed VOIP systems all around the world.

SITTI is a primary VCS manufacturer and supplier worldwide, capable of giving prompt and top edge solutions 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.


Ukraine is a special customer to SITTI. The extremely good relationship between our company and the Ukrainian Air Navigation Service Provider UkSATSE date back more than 20 years ago, when the first modern Voice Communication System (VCS) was installed to cope with the forecast of a significant increase in air traffic in that region.

The good performance of the provided systems and their compliance to the requirements set by the customer paved the way to the modernisation of the entire Air Traffic Control infrastructure in Ukraine.

SITTI is now in the process of providing two brand new MULTIFONO® M800IP® systems to the ACCs (Area Control Centers) of Odessa and Dnipropetrovsk. These systems represent a significant step forward towards the full introduction of VOIP (Voice over IP) features, according to the latest international standards, including ED 137.

Of course, existing non-VOIP telephone lines and radio channels are also fully managed by means of gateway boards allowing legacy digital/analogue links to be treated as they were natively VOIP. All together, the two systems have the capability of fully interfacing more than 44 analogue radio channels, 86 VOIP radio channels, 100 analogue telephone lines, E1 digital and IP links.

A significant number of touch screen panels for Controller Working Positions (CWP) is also part of the supply: more than 40 panels of different kinds are going to be installed at Odessa, plus another 30 at Dnipropetrovsk. Controllers will benefit of specially designed features that are very important to the customer, such as closed group call, conference notification tones, call hunting, briefing, etc.

The long lasting good reputation of SITTI as a primary VCS manufacturer and supplier is once again testified by these supplies, which will allow UKSATSE to take full benefit of the latest technological achievements and standard compliance.


Training is the way users have the possibility of understanding the technical features and capabilities of complex, redundant, future-proof, yet easy-to-maintain systems like those manufactured by SITTI. We have therefore always paid great attention to offer clients excellent training courses at different customized levels, according to their needs. High skilled personnel with long experience lead the courses aiming at providing the trainees with all information about the equipment and ancillary devices.

Along with traditional courses carried out at SITTI headquarters or at the customer’s premises, remote training is also available:

  • Technical Training – To provide all necessary guidelines to the technical team that will be working on the Voice Communication System.
  • Operational Training – To teach Radio and Telephone Operators the correct use of the VCS Controller Working Positions.
  • Train-to-Trainer Training – To provide a support guide for trainers designated to instruct the technical team that will be working on the VCS.

Remote learning is a means of training that avoids travelling without losing the benefits of excellent education on the systems being presented by the trainer. The reason for opting for remote training can be multifold, from remote physical distance to limited time available, or from governmental restrictions to cost reduction, or from travel visa to health reasons. SITTI has developed two remote training methodologies for supporting customer remote training needs:

  • Online Training
  • Computer Tutorials

The first typology provides training sessions that envisage the possibility of simultaneous interaction between SITTI trainer and the trainees. Both theoretical and practical sessions are provided, during which possible questions can be asked immediately to the trainer. The second typology is based on training tutorials focused on specific topics, in accordance with operational needs of the trainees. Each module is supported with presentation, tutorials and evaluation tests.

Both remote training modes are intended for both new VCS equipment users and to already established customers who need to refresh or deepen the knowledge on specific system aspects:

  • ATCOs
  • ATM Engineers
  • Maintenance staff
  • ANSP Officials


The Middle South Regional ATMB (Air Traffic Management Bureau) of Civil Aviation of China awarded SITTI the provision of a new Voice Communication System (VCS) for Zhuhai, on the Southern Chinese coast.

The new VCS belongs to the MULTIFONO® M800IP® family, complying with the most recent specifications of the EUROCAE ED 137 standard, which defined the rules for the use of VOIP (Voice over IP) in the Air Traffic Control field.

The system being supplied to ZhuHai is capable of natively interface both analogue and digital radios and telephone lines that are internally managed as IP streams thanks to appropriate gateway boards. This allows the system to get all benefits from the native straightforward flexibility of the IP-based architecture of the system itself, without losing the possibility of providing full access to all kinds of interfaces and lines.

The specification from the customer was to be able to connect at least 48 analogue radio channels, 16 VOIP ED-137 radios, more than 80 analogue telephone lines, plus a number of other interfaces, including digital E1 and ATS-QSIG. The provision also includes 9 Controller Working Positions (CWP).

Significant extended features (such as full call priority management, enlarged CWP monitoring, audio transmission coupling on the ground/ground segment, advanced best signal selection, failsafe PTT, signal looping, etc.) are put at the controllers’ disposal for better accomplishing their important tasks.

The Middle South Regional ATMB (Air Traffic Management Bureau) of Civil Aviation of China will deeply test the supplied system and all features therein; this process is expected to end up with the Reliability Acceptance of the system within the current year.


In last January, SITTI proudly announced ( to have been awarded a contract by ORO NAVIGACIJA (the State Lithuanian Air Navigation Service Provider) for the installation of a new Voice Communication System (VCS) at their Area Control Centre (ACC) premises in Vilnius. The VCS system has now been installed and made operational. The setup process has been supported by SITTI technicians that worked side-by-side with the local Lithuanian staff to overcome all possible problems that large installations may encounter.

The installed MULTIFONO® M800IP® Voice Communication System includes more than 50 Controller Working Positions (CWP) of different kinds:

  • console-integrated positions and
  • desktop version that can be used at any ordinary work place.

Thanks to the high level of integration at all CWPs, controllers can easily utilize the Radio communication facilities provided by the M800IP® system, as well as Telephone and Intercom call, including ATS/QSIG. All these features are natively part of the MULTIFONO® M800IP® system, in total compliance with the latest ED-137 VOIP standard. The high level of modularity and the software scalability of M800IP® making the system in Vilnius future-proof, ready for the connection and expansion of IP links and further connections.

SITTI is a primary VCS manufacturer and supplier worldwide, capable of giving prompt and top edge solutions 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.