Definition
A dedicated FAA data communications network used to carry administrative (non-operational) information between FAA facilities. It handles internal agency traffic such as scheduling, personnel, and management data, and is kept separate from the networks that carry real-time air traffic control and flight operations data.
Plain English
A behind-the-scenes FAA computer network that moves the agency's office paperwork and internal messages between its facilities. It is not the system controllers use to talk to airplanes.
Context Anchor
Seen in FAA acronym lists, NOTAM-related material, and references to aviation information systems.
Derivation
Administrative' comes from the Latin administrare, meaning 'to manage or run.' That sense fits here: this network is for running the agency, not for controlling traffic. 'Data Transmission Network' simply means a system for sending digital information between locations.
Why Pilots Care
A pilot usually does not operate the ADTN directly, but recognizing the acronym helps prevent confusion when reading FAA material that describes how aviation information is sent and shared.
Analogy
Think of a large company having two separate computer systems: one for the work that customers see, and one for HR, payroll, and internal email. ADTN is the FAA's internal-side network.
Intuition Check
Administrative does not mean unimportant. Here it means data handled through an FAA message network rather than spoken directly over the radio to an aircraft.
Example Sentence 1
The facility's routine staffing and scheduling messages are routed over the ADTN rather than the operational network.
Example Sentence 2
Before approving the new procedure, the specialist verified the details had been transmitted correctly over the ADTN.