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3.4.13 The ATN addressing and naming plans shalI allow
States and organizations to assign addresses and names within
their own administrative domains.
3.4.14 The ATN shall support data communications to
fixed and mobile systems.
3.4.15 The ATN shall accommodate ATN mobile subnclworks
as defined in this Annex.
3.4.16 The ATN shall make provisions for the efficient
use of limitcd bandwidth subnetworks.
3.4.17 The ATN shall enable an aircraft intermediate
system to be conneclcd to a ground intermediate syslem via
concurrent mobile subnetworks.
3.4.18 The ATN shall enable an aircraft intermediate
system to be connected to multiple ground intermediate systems.
3.4.19 Thc ATN shall enable the exchange of address
information bcrwecn application entities.
3.4.20 The ATN shall support the context management
(CM) application when any of the other air-ground applications
are supported.
3.4.21 The ATN shall be capable of establishing, maintaining,
releasing and aborting peer-to-peer application
associations for the conlext management (CM) application.
3.4.22 The ATN shall be capable of establishing, maintaining,
releasing and aborting peer-to-peer application
associations for the automatic dependent surveillance (ADS)
applicalion.
3.4.23 The ATN shall bc capable of establishing, maintaining,
releasing and aborting peer-lo-peer application associations
for the controller-pilot data link communicatiolls
(CPDLC) application.
3.4.24 The ATN shall bc capable of establishing, maintaining,
releasing and aborting peer-to-peer applicalion
associations for the automatic terminal information service
(ATIS) application.
3.4.25 The ATN shall be capable of establishing, maintaining,
releasing and aborting application associations for the
ATS message handling services (ATSMHS) application.
3.4.26 The ATN shall be capable of establishing, maintaining,
releasing and aborting peer-LO-peer application associations
for the ATS interfacility data communication (AIDC)
application.
3.4.27 Where the absolutc timc of day is used within he
Am, it shall be accurate to within 1 second of coordinated
universal time (UTC).
Note.- A time accumcy value may result in
sytzcltron ization errors of np to two times the stated accuracy
value.
3.4.28 The end systern shall make provisions to ensure
that the probability of not detecting a 255-octet message being
mis-delivered, non-delivered or corrupted by the internet conlmunication
service is lcss than or equal to 10-' per messagc.
Note.-- It is assumed thaf ATN suhnetworks wlll enslire
data in~egi-cin~n szsterzt with this q3stetnl evel requirement.
3.4.29 ATN end systems supporting ATN security
services shall be capable of authenticating the identity of peer
end systems, authcnlicating the source of application rnessagcs
and ensuring the data integrity of the application messages.
Nore.- Application ntessages in this context i~zcl~~de
nzessuges related to ATS, systenls nlnnagernenr und directory
services.
3.4.30 ATN ground and air-ground boundary intermediate
systems supporting ATN security services shall be capable of
authenticating thc identity of peer boundary intermediate
systems, authenticaling the sourcc of routing information and
ensuring the data integrity of muting information.
No. 76
Part I Annex I0 - Aeronautical Telecommunications
3.4.31 The ATN shall be capable of establishing, main- a) log-on;
taining, releasing and aborting peer-to-peer application associations
for the exchange of directory information. b) contact;
3.4.32 ATN systems supporting ATN systems c) update;
management shall facilitate enhanced continuity of ATN
operations, including the monitoring and maintenance of the d) CM server query;
quality of the communications service.
e) CM server update;
3.4.33 The ATN shall be capable of establishing, maintaining,
releasing and aborting peer-to-peer application associ- 0 ground forwarding; and
ations for the systems management (SM) application.
g) registration.
3.4.34 The ATN shall be capable of establishing,
maintaining, releasing and aborting peer-to-peer application Note.- The technical provisions for the CM application
associations for the aviation routine weather report service are defined in Doc 9705, Sub-volume II.
(METAR) application.
3.5.1.2 ATN DIRECTORSYE RVICES(D IR)
3.5 ATN APPLICATIONS REQUIREMENTS 3.5.1.2.1 Thc ATN shall be capable of supporting the
following DIR application functions:
Note I.- Implementation of ATN applicution(s) within a
State or region does not imply implemenhtion of all of the a) directory bind;
 
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