Datalink Systems

Full range of ground and airborne digital communications systems

Private Datalink Network

ADELIS provides Air Navigation Service Providers with full control over the provision of ATN / VDL Mode 2 services enabling CPDLC communications in their airspace through a proprietary infrastructure. It includes high-quality aeronautical VHF radio equipment, VDL Mode 2 subnetwork and ATN networking systems that are interoperable with existing avionics and ground infrastructures..

  • Gives ANSPs full control over datalink provision in whole or part of their airspace
  • Optimizes spectrum capacity and improves network performance while reducing costs
  • Smoothly integrates with legacy networks and ATC systems
  • Provides support for multi-frequency (Model C/D compatible)
  • Allows ANSPs to offer added-value infrastructure services to airlines and service providers
  • Supports multiple GSIF implementations: no need for aircraft retrofits

An all-inclusive ground datalink infrastructure

ADELIS is a turn-key ground infrastructure solution that relies on a scalable VDL M2 ground stations network adapting to any airspace size or configuration. Multi-frequency operations are managed by a Centralized VDL Mode 2 Management Entity (C-VME) implementing efficient load-balancing mechanisms for an optimized use of the spectrum and network capacity.

It includes ATN air-ground and ground-ground routers as well as an ACARS processor offering, respectively, an IP SNDCF interface and an ARINC 620 / BATAP-MATIP interface with customer ANSPs network infrastructure and ATC systems. Traffic is routed from/to neighbour ANSPs as well as airlines operations centers via an interconnection with legacy CSP networks allowing cross-border ATC communications and seamless airline operations through.

ADELIS comes along with sophisticated performance monitoring and network management functions improving network operations efficiency and quality of the end-to-end service. It also includes recording, billing and reporting functions.

ATN Systems

We provide ATN systems, including airborne ATN routers (Class 6), air-ground ATN routers (Class 5), ground-ground ATN routers (Class 4), and a dual stack data link server for ATC systems.
Our COTS ATN systems support air-ground Air Traffic Services (ATS) and interface with legacy datalink systems.

  • Supported protocols: SNDCF, ES-IS, IDRP, TP4, ULCS, ASEs (CM, CPDLC, ADS-C), ACARS (A620/A622)
  • Interfaces: SNDCF over IP ; BATAP / MATIP Type B
  • Scalable architecture supporting over 10000 connections, up to 12 adjacencies
  • Provides support for multi-frequency (Model C/D compatible)
  • Redundant configuration
  • Compliant with European Regulations
  • Software Assurance Level AL5

ATN: the Aeronautical Telecommunications Network

ATN, or the Aeronautical Telecommunications Network, is a worldwide network infrastructure designed to support all types of aviation air-ground communications. ATN is currently used in Europe for CPDLC applications (ATN Baseline 1) and also for enhanced Air Traffic Services (ATN Baseline 2), including the Initial 4-Dimension Trajectory concept (enhanced route clearances; 4D trajectory negotiation with ATC).

The current ATN infrastructure relies on the OSI (Open Systems Interconnection) model. However, evolutions are ongoing to implement an IP-based network infrastructure supporting ATN applications: ATN/IPS (Internet Protocol Suite).

The IPS infrastructure will provide an air-ground network offering higher reliability and increased security for both ATC and AOC communications. ATN/IPS will offer a more secure air/ground link between aircraft and ground stations, and will improve the security of the end-to-end transmission of ATC and AOC applications.

The ATN/IPS targeted subnetwork will additionally offer improved datalink performance as well as higher bandwidth. IPS will utilize multiple air-ground links, including the legacy VDL Mode 2 link, Future SatCom (such as SwiftBroadband, Iris Service Evolution), LDACS, and AeroMACS. The implementation of the ATN/IPS network will serve as an enabler for several technological concepts such as 4D-Trajectory-based operations and performance-based operations.

VHF Data Radio Transceiver

ALTYS Technologies provides aeronautical VHF data transceiver supporting VDLM2 and ACARS based on innovative software-defined radio (SDR) technology. With the highest detection and decoding performance, EXTRA is the most flexible and reliable VHF transceiver currently available.

USB connector
Plug-and-Play to ALTYS test solutions DREAM and PEER
ec compliance Directive 2014/30/CE on Electromagnetic
Compatibility EMC
Directive 2011/65/EU one ther Restriction of the use of Hazardous Substances in electrical and electronic equipment (RoHS)
Regulation (EC) N° 552/2004 on Interoperability of the European Air Traffic Management Network
Directive 2006/95/CE on Voltage Limits
sarps compliance ACARS physical layer functionality, according to ARINC 618
VDL2 physical layer functionality, according to ICAO SARPS annex 10, ICAO Manual on VHF Digital Link (VDL) Mode 2 Technical Specifications, ETSI EN 301 841-1 and ARINC 631.
vhf data output formats Raw Datalink data (UPX* format)
I/Q data for RF analysis (optional)
DIMENSIONS 2U 19 inch rack mounting
482.6 mm wide, 88.14 mm high
350 mm deep
Supply Voltage 100V/220V - 50/60 Hz
Power Consumption Max 300W (25°C)
Temperature Range -40°C to 70°C
Humidity Range 10% to 90% RH, non-condensing
Cooling System Upper side: Fanholes & internal CPU cooler
Rear side: Case fan
full - duplex operation Enables reception and transmission of ACARS & VDL2 data
operating frequency range 118 MHz - 137 MHz
frequency accuracy < 2.5 ppm
sensitivity < -130 dBm (with uncorrected BER < 10-3)
modulation VDL2: D8PSK
receiver dynamic range 100 dBm
transmitter output power < -130 dBm (with uncorrected BER < 10-3)
adjacent channel rejection ACARS: ≥ 60 dB
VDL: ≥ 44 dB
symbol rate 10.5 ksym/s (VDL2)
bit rate 31.5 kb/s (VDL2), 2.4 kb/s (ACARS)
channel spacing 25 kHz