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handling service application is included in the Manual of
Technical Provisions for the Aeronautical Telecommunication
Network (ATN) (Doc 9705), Sub-volume III.
Note 3.- The ATS message service is provided hy the
implementation over the ATN internet communication service
of the message handling systems spectfied in ISO/IEC
(International Organization ,for Standardization/International
Electrotechnical Commission) 10021 and ITU-T (International
Telecommunication Union - Telecommunication
Standardization Sector) X.400 and complemented by the
additional requirements speciJied in the Manual of Technical
Provisions for the Aeronautical Telecommunication Network
(ATN) (Doc 9705). The two sets of documents, the ISO/IEC
MOTIS (Message-Oriented Text Interchange System)
International Standards and the ITU-T X400 Series of
Recommendations (1988 or later) are, in principle, aligned
with each other Howeve4 there are a small number of
dtferences. In the above-mentioned document, reference is
made to the relevant IS0 International Standards and
International Standardized Profiles (ISP), where applicable.
Where necessary, e.g. ,for reasons of interworking or to point
out dtferences, reference is also made to the relevant X400
Recommendations.
Note 4.- The ,following types of ATN end systems
performing ATS message handling services are defined in the
Manual of Technical Provisions for the Aeronautical Telecommunication
Network (ATN) (Doc 9705), Sub-volume 111:
I) an ATS message server,
2) an ATS message user agent;
3) an AFTN/AMHS gateway (aeronautical ,fixed telecommunication
netwovkLATS message handling system); and
4) a CIDIN/AMHS gateway (common ICAO data interchange
networWATS message handling system).
Connections may be established over the internet communications
service between any pair constituted of these ATN end
systems (see Table 4-1).
Table 4-1. Communications between ATN end systems implementing
ATS message handling services
ATN End System 1 ATN End System 2
1 ATS Message Server 1 ATS Message Server I
ATS Message Server AFTNIAMHS Gateway ~
ATS Message Server CIDINIAMHS Gateway
ATS Message Server ATS Message User Agent
AFTNIAMHS Gateway AFTNIAMHS Gateway
1 CIDINIAMHS Gateway 1 CIDINIAMHS Gateway 1
CIDINIAMHS Gateway AFTNIAMHS Gateway
Annex 10 - Aeronautical Telecommunications
4.7 Inter-Centre Communications (ICC)
The inter-centre communications (ICC) applications set shall
be used to exchange ATS messages between air traffic service
users over the ATN internet.
Note I .Th e ICC applications set enables the exchange of
inforrnation in support of the,following operational services:
a) flight notification;
b) ,flight coordination;
c) tmnsfer of control and communications;
d) ,flight planning;
e) airspace management; and
,fl air tryffic ,flow management.
Note 2 .Th e ,first of the applications developed ,for the
ICC set is the ATS interfacility data communication (AIDC).
Note 3 . The AIDC application exchanges inforrnation
between ATS units (ATSUs) ,for support of critical air trufic
control (ATC) ,functions, such as notification of ,flights
Volume 11
approaching a ,flight information region (FIR) boundary,
coordination of boundary conditions and transfer of control
and communications authority.
Note 4 . The detailed specjfication of the AIDC
application is included in the Manual of Technical Provisions
for the Aeronautical Telecommunication Network (ATN)
(Doc 9705), Sub-volume 111.
Note 5 . The AIDC application is strictly an ATC
application ,for exchanging tactical control information
between ATS units. It does not support the exchange of
information with other ofices or,facilities.
Note 6 .Th e AIDC application supports the following
operational services:
a) ,flight notjfication;
b) ,flight coordination,
c) transfer of executive control;
dj transfer of communications; and
e) transfer of general information (flight-related data or
,free text messages, i.e. unstructured).
CHAPTER 5. AERONAUTICAL MOBILE SERVICE -
VOICE COMMUNICATIONS
5.1 General 5.1.5 Recommendation.- After a call has been made to
the aeronautical station, a period of at least 10 seconds should
N o t e . For the purposes of these provisions, the elapse before a second call is made. This should eliminate
communication procedures applicable to the aeronautical unnecessary transmissions while the aeronautical station is
mobile service, as appropriate, also apply to the aeronautical getting ready to reply to the initial call,
mobile satellite service.
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