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.

INTERFACES | |
RF CONNECTORS | BNC/F (VHF) |
SERVICE FACILITY CONNECTION | LAN & WAN Ethernet RJ45 connectors, USB connector |
Plug-and-Play to ALTYS test solutions DREAM and PEER |
CONFORMANCE | |
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. |
DATA OUTPUT | |
vhf data output formats | Raw Datalink data (UPX* format) |
I/Q data for RF analysis (optional) |
GENERAL CHARACTERISTICS | |
DIMENSIONS | 2U 19 inch rack mounting
482.6 mm wide, 88.14 mm high 350 mm deep |
WEIGHT | 15 Kg |
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 |

VHF TRANSCEIVER | |
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 |
ACARS: MSK | |
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 |