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whether the CCJTI Q.931 standad coding or the satellite
network specific coding rules apply.
(-1.5 + N) dBW for a Class 1 AES (as defined in
section 16); CCITT 4.93 1 standard coding:
(-0.5 + N) dBW for Class 314 AES with intermediate
gain antenna; Code Function
(10.5 + N) dBW for Class 314 AES with high gain antenna; 0 User
1 Private network serving the local user
where N is the value of this field (range 0 to 15). 2 Public network serving the local user
3 Transit network
4 Public network serving the remote user
5 Private network serving the remote user
27a. ISU/SSU (1 bit) 7 International network
10 Network beyond interworking point
This bit shall be 0 for the initial signal unit of a series of SUs
in a set. This bit shall be 1 for each subsequent signal unit in
the series. All other values are reserved.
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Part I Annex 10 - Aeronautical Telecommunications
Satellite network specific coding:
Code Function
1 AES - user network side
2 AES - satellite network side
3 GES - satellite network side
4 GES - fixed network side
5 Reserved
6 Interworking with the terrestrial network
All other values are unassigned.
Code
34. Network ID (4 bits)
Function
Unassigned
El641E163
X.121
E69
Private network - no address following
Private network - address following
To be coded for applicable public and private
networks (SITA, ARINC, etc.)
Distress call
31. LSU number (2 bits)
Code Function 35. NOT (1 bit)
0 Indicating the initial LSU and the LSU contains This field shall indicate the transmitter capability of the AES.
Psmc, R,,,O, Rs,,I frequencies in this order
1 LSU contains P,,,, Rsm,O, R,,, 1 frequencies in this Code Function
order (as for code 0, but this can appear anywhere
in the sequence)
2 LSU contains &,,2, R,,,3, RSm,4 frequencies in 0 Indicating the AES has one transmitter
this order 1 Indicating the AES has multiple transmitters
3 LSU contains %,,5, RSmc6, R,,,7 frequencies in
this order
31a. LOV (1 bit)
This field shall indicate the capability of the AES to respond
to the log-on interrogation from the GES.
Code Function
O AES capable of responding
1 AES not capable of responding
36. Number of bursts reserved
(3 bits)
This field shall identify the number of bursts reserved as a
binary number.
Code Function
0 Unassigned
1-7 1-7 bursts reserved
32. Message length (7 bits)
This field shall indicate, in direct binary number, the number
of SUs in an SU set (2 user octets in the initial signal unit, and
8 octets per subsequent signal unit). When used for requesting
T channel capacity, this number shall be increased by one each
time a request (initial or repeated) is transmitted via the T
channel. The maximum length of an initial SU set shall be
limited to 64 (SUs).
37. Number of C channels
(5 bits)
This field shall indicate, as a direct binary number, the number
of voice channels which the AES is equipped for. This field
shall be 1 for Level 3 hES.
33. Message type (1 octet) 38. Number of frequencies
(4 bits)
This field shall identify the type of the message. The complete
set of message types shall be as listed in the table "Message This field shall indicate, as a direct binary number (e.g. I. - I
.type list" which is included at the end of this appendix. frequency), the number of frequcncics assigned.
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No. 75
Annex 10 - Aeronuuticul Tekcommunicutiuns Volume ZZZ
39. Number of octets in
the last SSU (4 bits)
Code
15
This field shall indicate, as a direct binary number (e.g. 1 = 1
octet), the number of octets of user data in the user data field
of the last SSU ol the SU set.
40. Number of SSUs
(in ACK/NAK) (2 bits)
Code Function
0 No SSU, only used when ACKCTL field equals 14
or 15
1 One SSU
2 m o ssus
3 Three SSUs
41. P/R MSG (1 bit)
This field shall indicate whether the log-on confirm SU has an
associated P/R channel control SU.
Function
Distresslurgency C channel requestlassignrnent
signalling; distresslurgency T channel request
signalling; all T channel assignment signalling
(including reservation forthcoming signalling); link
layer protocol signalling for distress data traffic (Q
= 14)
Distresslurgency packet-mode data
Link layer protocol signalling for flight safety, other
safety and non-safety data traffic (Q = 0-3, 5-8, 11);
AESIGES management SUs; flight safety and other
"safety" T channel request signalling (Q = 11, 5-8);
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