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services, numbering of individual ground destinations shall
consist of the following digit sequence:
a) a digit "8";
Note 3.- Country codes are based on the International
Telecommunication Union (ITU) country code shown in
Table 1 of Appendix 43 of the ITU Radio Regulations.
Howevel; only one code per country should be used in the
AMS(R)S service for sofey and regulatoq comna~mications.
4.8.8.3.2 Network ID. Network ID "10" shall be used in
all air-originated safety calls which are to be routed to a private
network specifically intende,d to support safety circuit mode
services.
Note.- Additional network IDS nlay be used for safety
communications upon prior arrangement between GES
operators and the agected ATS administrations and aircraft
operators.
4.9 AIRCRAFT EARTH STATION
(AES) MANAGEMENT
4.9.1 General
AES management functions shall include the functions
performed in the AES to initiate and carry out a log-on
process, to maintain a logged-on status, to initiate and carry
out a log-off process, and to manage the data and voice
communications with a GES.
4.9.2 AES management
interfaces
b) a three-digit country code signifying the destination 4.9.2.1 The AES management shall provide for interfaces
State; to the following AES entities:
c) a three-digit facility code signifying the destination a) subnetwork layer;
facility within the destination State. The code values to
be assigned to individual facilities within a State shall be b) link layer;
determined and published by the administration of the
destination State; and C) physical layer;
d) a three-digit agent code signifying the destination agent d) circuit-mode services.
within the destination facility. The code values to be
assigned to individual agents within a facility shall be
determined and published by the organizational entity 4.9.2.1.1 S U B N ~ O R,~, J~YE R
controlling the facility.
. . , The information exchanged between the AES management and
Note 1.- A GES is m t rnquired to convert any ground the subnetwork layer shall include the following to the
address received during art air-originated AMS(R)S call, The subnetwork layer:
terrestrial network may comet? any such address, #necessary,
to that which is required for that particulur network. 1) log-on status: logged on initial or renewaL'logged off;
Note 2.- GES operators may convert a ground address to 2) log-on GES ID (if logged on);
that which is required by a particular terrestrial network upon
mutual agreement with that network operator 3) AES ID.
211 1/00
No. 75
Part I Annex 10 - Aeronautical Telecommunications
4.9.2.1.2 LINK L4YER b) from circuit-mode services:
The information exchanged between the AES management and 1) request for assignment of a transmit channel unit and
thc link layer shall be in the form of the link interface data associated Q number, application reference number,
units (1,IDUs) described in 4.5.2. All LIDUs exchanged across frequency, channel rate and initial EIRP;
this interface shall be as specified in Table 4-44 except that the
information sent to the AES management shall also include 2) request for assignment of a receive channel unit and
interface control information commanding the AES associated Q number, application reference number,
management to randomly select an R channel frequency. frequency and channel race;
Note.-- The link layer assembles SUs in accordance with 3) command to randomly select an R channel frequency.
the information in the received WDUs. LJDU formats are not
prescribed. SU formats are given in Appendix 2 to Chapter 4.
4.9.3 AES management finctions
4.9.2.1.3 PHYSICALLAYER 4.9.3.1 AES management shall carry out the following
functions:
The information exchanged between the AES management and
the physical layer shall include the following: a) AES table management;
a) to the physical layer: b) AES log-status management;
1) frequencies for the transmit and receive channel c) AES channel management.
units;
2) channel unit mode selection (R, T or C channel); 4.9.3.2 AES TABLE MANAGEMENT
3) channel rates;
4) transmitter power settings;
5) channel unit number;
b) from the physical layer:
4.9.3.2.1 AES management shall maintain the following
two tables:
a) system table;
b) log-on confirm table.
I) P channel lossldegradation indication; 4.9.3.2.2 SYSTEM TABLE
2) P channel synchronization indication; The content of this table for each beam in a satellite service
area shall be as provided by the GES (see 4.10.4.2.2).
3) estimated bit error rate on each channel unit
receiving a C channel.
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