Established in 1946, SITTI is a private company committed to providing advanced technical solutions for Voice Communication Systems (VCS) and associated equipment.

SITTI is a world primary system supplier of VCS Systems, based on the most technologically advanced architecture, fully compliant to the latest international standards, e.g. VOIP ED137.

SITTI is today present in most countries in the world with a large base of installed VCS and ancillary equipment and services in the Military and Civilian Air Traffic Control (ATC) arena, as well as public and private Strategic Emergency Services (SES), Police, Fire and Ambulance services, Control Room Management, etc, wherever secure, integrated and configurable communications are required.

MULTIFONO® M800IP® and M600S

With more than 50 years experience in integrated management systems for radio and telephone communications, SITTI is one of the world’s primary system suppliers for civil, military, public and private agencies active in Air Traffic Control and other strategic services.

Confirming the company’s solid leadership, constant monitoring of the recommendations of the international research and standards bodies, and commitment to technical and operating capabilities responding to user needs, MULTIFONO® is a fully digital Voice Communication Switching System (VCSS), characterized by highly modularity to interface any type of radio device and telephone line, for optimised communications in the all service environments.

Fully fault-tolerant architecture, superior scalability and configurability, together with simple maintenance are the strength points of the MULTIFONO® products. They are the most efficient and technologically advanced solution to the technical, functional and reliability needs of communication management systems in strategic civil and military service operating environments.

Modularity and Sizing

Configuration flexibility is one of the key characteristics of the MULTIFONO® products. Implemented on a size-independent architecture, the system can be configured for installation in small Control Rooms or large Control Centres with hundreds of Operator Workstations and Radio/Telephone links. The resulting flexibility allows SITTI customers to upsize their MULTIFONO® installation during the system life cycle, without heavy initial costs to support future upgrades.

Open Architecture

MULTIFONO® system configurations can be extended at any time with new links or services and/or additional Operator Workstations simply by adding new interface cards, with no loss of efficiency and seamlessly for all elements not involved in the upgrade.

Distributed and Duplicated Logic

MULTIFONO® systems are controlled by independent microcomputer operating units, running dedicated firmware/software. This provides an absolute guarantee against the possibility of a single point of failure jeopardising overall system operations.


M800IP® MULTIFONO® radio and telephone Voice Communication System (VCS) represents SITTI top level Voice Over IP (VoIP) platform. It fully meets Air Traffic Control requirements by integrating IP Network technological achievements coupled with user-friendliness at all Operator and Maintenance levels.

SITTI boasts a long term ongoing presence in several international standardisation Working Groups. Thanks to SITTI strict collaboration and proactive contribution to such teams, M800IP® adheres to ICAO, EUROCONTROL and EUROCAE worldwide Recommendations and Standards, with all the required flexibility to fulfil any user requirements and to support any operational role. In particular, M800IP® is fully ED137 compliant, as testified by the many interoperability events which SITTI has been successfully participating in, both in Europe and in the USA at FAA.

Data and audio communications inside the system are fully VoIP-based. Its Open Architecture has been designed focusing on the highest level of modularity, scalability and process distribution, to grant a unparalleled Reliability Ratio of 99.9999%.

Duplicated, Parallel Operating, Star Architecture and Geographically distributed subunits, equipment, devices and core elements, ensure continuous functionality and no single-point-of-failure for complete Fault Tolerant operations.

These features, coupled with a powerful Management and Supervision software platform, all concur to make SITTI M800IP MULTIFONO® VCS the best choice for strategic Civil and Military Communication applications.


SITTI has put large effort in developing a wide range of interfaces (GVS gateways) towards legacy Radio equipment and Telephone connections, thus guaranteeing their correct performance and perfect integration into the new M800IP® internal architecture. Reliable and user-friendly Human Machine Interface (HMI) devices provide Controllers with all operational information for a safe and efficient management of the service they are responsible for. SITTI is also manufacturing ergonomic consoles for optimized and customisable access to the offered technology, in line with environmental conditions.

Recording Solutions

Air Traffic Control applications have some of the world’s strictest legal requirements and regulations especially when it comes to recording, because recorded information has direct impact on incident analysis, both for liability attribution and in search for mitigation procedures.

SITTI’s VRS800G recorder solution is based on the large competence and expertise acquired by GuardREC in the field of recording systems, not just limited to voice, but also including screen and radar data. The cooperation between these two companies provides customers with an unrivalled combination of deep ATC market requirements knowledge and flexible and reliable recording software applications, running on COTS hardware.

Standard compliance (e.g. ED137, CAP670, ED111), security (including data encryption and user access logging), redundancy (to avoid any single-point-of failure), reliability (24/7 use, 99.99% uptime in redundant configuration), time synchronisation (of an unlimited number of recorded sources), advanced playback features (search and play options) are the main features that make VRS800G an outstanding recording and replay system. This is the perfect choice for recording needs, fully integrated with SITTI’s MULTIFONO® Voice Communication System.