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SARPs to enhance immunity to interference from VDL
transmitters on board the same aircraft.
Aeronautical telecommunication network (ATN) system management,
security and directory services: removal of detailed material relating
to CIDIN; integrated-voice and data link system (VDL Mode 3); data
link satisfying surveillance applications (VDL Mode 4); deletion of all
the provisions for VDL Mode 1; removal of the detailed technical
specifications for VDL Mode 2; aeronautical speech circuits; update
of references to the ITU Radio Regulations.
Adopted
Effective
Applicable
20 March 1995
24 July 1995
9 November 1995
12 March 1996
15 July 1996
7 November 1996
12 March 1997
21 July 1997
6 November 1997
19 March 1998
20 July 1998
5 November 1998
18 March 1999
19 July 1999
4 November 1999
13 March 2000
17 July 2000
2 November 2000
12 March 2001
16 July 2001
I November 2001
llll/OI
No. 76
Annex 10 - Aeronautical Telecommunications Volume 111
--
Adopted
Effective
Amendment Source(s) Subjecr(s ) Applicable
77 Secondary Surveillance Radar Mode S subnetwork (Part I), aircraft addressing system (Part I). 27 February 2002
Improvements and Collision 15 July 2002
Avoidance Systems Panel 28 November 2002
(SICASP)
78 Air Navigation Commission Changes to technical specifications relating to radio frequency 5 March 2003
channels: introduction of registration requirement for ELTs; 14 July 2003
incorporation of VDL Modes 3 and 4 in the table of ATN subnetwork 27 November 2003
priorities (Table 3-3); editorial amendments.
79 Eighth meeting of the Changes to technical specifications relating to high frequency data 23 February 2004
Aeronautical Mobile link (HFDL) to align them with relevant provisions of ITU RR; 12 July 2004
Communications Panel introduction of FM immunity characteristics for VDL Mode 4; 25 November 2004
(AMCP) deletion of the note indicating that VDL Mode 4 SARPs apply to
surveillance applications.
25/11m4
No. 79
Annex 10 - Aeronautical Telecommunications
transfer a packet to a DTE address not in the crossreference
table shall result in the action specified in
5.2.6.3.3.1.
b) Other SVC packers. For an SVC, a request to send a
packet to a ground DTE shall cause the packet to be
multisite-directed to the last Mode S interrogator used to
successfully transfer (uplink or downlink) a packet to
that DTE, provided that this Mode S interrogator is
currently in the II code-DTE cross-reference table.
Otherwise, 'an SVC packet shall be downlinked using the
multisite-directed protocol to any other Mode S
interrogator associated with the specified ground DTE
address.
Level 5 transponders shall be permitted to use additional
interrogators for downlink transfer as indicated in the II code-
DTE cross-reference table.
5.2.8.1.3.2 A downlink frame transfer shall be defined to
be successful if its Comm-B or ELM close-out is received
from the transponder within Tz seconds as specified in
Table 5-1. If the attempt is not successful and an SVC packet
is to be sent, the I1 code-DTE cross-reference table shall be
examined for another entry with the same called ground DTE
address and a different Mode S I1 code. The procedure shall be
retried using the multisite-directed protocol with the new
Mode S interrogator. If there are no entries for the required
called DTE, or all entries result in a failed attempt, a link
failure shall be declared (5.2.8.3.1).
5.2.8.2 SUPPORFTO R THE DTE(S)
5.2.8.2.1 GDLP connectivir): reporting. The GDLP shall
notify the ground DTE(s) of the availability of a Mode S data
link-equipped aircraft ("join event"). The GDLP shall also
inform the ground DTEs when such an aircraft is no longer in
contact via that GDLP ("leave event"). The GDLP shall
provide for notification (on request) of all Mode S data linkequipped
aircraft currently in contact with that GDLP. The
notifications shall provide the ground ATN router with the
subnetwork point of attachment (SNPA) address of the mobile
ATN router, with the position of the aircraft and quality of
service as optional parameters. The SNPA of the mobile ATN
router shall be the DTE address formed by the aircraft address
and a sub-address of 0 (5.2.3.1.3.2).
5.2.8.2.2 ADLP connectivit), reporting. The ADLP shall
notify all aircraft DTEs whenever the last remaining entry for
a ground DTE is deleted from the I1 code-DTE cross-reference
table (5.2.8.1.1). This notification shall include the address of
　
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