Airtel ATN is a developer of data communications software for the aerospace industry. The company's primary focus is on the provision of data link solutions for ATN (Aeronautical Telecommunications Network). It has extensive expertise in ATN having been involved in the development of ATN systems for over a decade. The company's ATC products include ATN Routers, ATN End-Systems and Test Tools. Airtel provides ATN complaint routers for Air/Ground and Ground/Ground use which have been used extensively in major EUROCONTROL and FAA ATN programmes. Airtel's Data Link End-System provides the communications support for CM (Context Management), CPDLC (Controller Pilot Data Link) and ADS (Automatic Dependent Surveillance). The company also provides Test Tools for validating Airborne and Ground implementations of CM, CPDLC and ADS. Airtel also has significant experience in certified avionics software development. Airtel's router software is incorporated in the Rockwell Collins' CMU-900 and on the AIRBUS ATSU.