Air Traffic Management Concept Baseline Definition - The Boeing ...

5.2.2 Ground/Ground Communication
In addition to the air/ground communication described above, communication among
ATC facilities and between ATC and AOC facilities is important to CNS/ATM. Much of
the communication internal to the NAS is conducted on FAA-specified systems that do
not necessarily conform to international standards. Communication between the NAS and
the ATC systems of other countries either conform to ICAO and other international
standards or is based on a bilateral agreement between the U.S. and a specific adjacent
country. Figure 5.6 illustrates the general overview of ground/ground voice and data
communication.
AIDC
ATSMHS
AFTN
Telephone
AIDC = ATS
Interfacility Data
Communication
AFTN = Aeronautical
Fixed Telecommunication
Network
ATN
ATSMHS = ATS
Message Handling
Services
NADIN II
NADIN = National
Airspace Data
Interchange Network
PTN = Public
Telephone Network
PTN
FAA Lines
Figure 5.6 Interfacility Communication
5.2.2.1 Voice
The primary communication between ATC facilities and between AOC and ATC is via
telephone. Voice switching centers at ATC facilities provide automated dialing and
connection through either dedicated FAA circuits or through the public telephone
network.
5.2.2.2 Current Data
Data is communicated among centers, TRACON’s, towers, and Flight Service Stations
over a dedicated packet switched network called National Airspace Data Interchange
Network (NADIN). Data include flight plans and transfer-of-control information between
host computers.
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