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slot number of the allocated reservation within the starting
frame number.
67. SU type (4 bits)
This field shall indicate whether the extended length SU is
carrying signalling application information or user data. In the
latter case, its value shall represent the number of octets of
user data in the user data field of the extended length (i.e.
19 octet) SU.
Code Function
0 Unassigned
1-1 1 1 to 11 octets of user data SU
12- 14 Unassigned
15 Signalling information SU
68. TDMA MSG
(1 bit)
This field shall indicate whether the log-on confirm SU has an
associated T channel control message.
Code Function
0 NO associated T channel control message
1 Associated T channel control message exists
69. TX channel number
(2 bits)
Code Function
0 Channel No. 0
1 Channel No. 1
2 Channel No. 2
3 Channel No. 3
70. Universal time
(7 octets)
The time information shall be synchronized to the UTC time
standard.
Format:
Century:
Year:
Month:
Day:
Hour:
Minute:
Second:
Each of the following is a single octet field
coded in the binary coded decimal (BCD)
format. The code FF, can be used in any field
to represent a NULL entry.
Century AD (Anno Domini), CC (2 digit): 00
to 99
Year within the century. YY (2 digit): 00 to 99
Month within the year, MM (2 digit): 01 to 12
Day within the month, DD (2 digit): 01 to 3 1
Hour within the day, hh (2 digit): 00 to 24
Minute within the hour, mm (2 digit): 00 to 59
Second in the minute, ss (2 digit): 00 to 59
71. Voice channel characteristics
(6 bits)
Voice rate Voice rate Channel FEC
Code to AES from AES bit rate rate
Unassigned
Reserved
9 600 LPC' 9 600 LPC' 21 000 1/2
Reserved
Unassigned
Reserved
Unassigned
Reserved
Unassigned
1. LPC corresponds to the multi-pulse excited linear
predictive coding algorithm as defined in Section 4.8.
Part Z Annex 10 - Aeronautical Telecommunications
MESSAGE TYPE LIST (see paragraph 33)
Message format figure
Code (refer to Appendix 2 Q number
(HEX) Function 10 Chapter 4) (precedence)
BROADCAST
00 Reserved
01 fill-in signal unit
02 AES system table broadcast (GES P,,, and R,,, channels PARTIAL)
03 AES system table broadcast (beam identification PARTIAL)
04 AES system table broadcast (GES beam support PARTIAL)
05 AES system table broadcast (GES Ps,, and R,, channels COMPLETE)
06 AES system table broadcast (beam identification COMPLETE)
07 AES system table broadcast (GES beam support COMPLETE)
OX System broadcast - selective release
09 System broadcast - universal time
OA AES system table broadcast (index)
OB AES system table broadcast (satellite identification PARTIAL)
OC AES system table broadcast (satellite identification COMPLETE)
OD AES system table broadcast (2nd series of GES P,,, and q,, channels
COMPLETE)
OE Reserved
SYSTEM LOG-ONLOG-OFF
10 Log-on request
11 Log-on confirm
12 Log control (R channel)-log-off request
12 Log control (P channel)-log-off request
13 Log control (P channel)-log-on reject
13 Log control (R channel)-reassignment reject
14 Log control (P channel)-log-on interrogation
15 Log-onllog-off acknowledge (P channel)
15 Log-odlog-off acknowledge (R channel)
16 Log control (P channel)-log-on prompt
17 Log control (P channel)-data channel reassignment
17 Log control. (R channel)-ready for reassignment
CALL INITIATION
20 Access request telephone (non-safety)
20 Access request telephone (other safety)
20 Access request telephone (flight safety)
Annex 10 - Aeronautical Tekcommunicatwns Volume ZZZ
Code
(HEX) Function
Access request telephone (distress)
Call announcement (non-safety)
Call announcement (other safety)
Call announcement (flight safety)
Call announcement (distress)
Call information service address (ISU)
Access request data (R/T channel) (non-safety)
Access request data (IUT channel) (flight safety and other safety)
Access request data (R/T channel) (distress)
Abbreviated access request telephone (other safety)
Abbreviated access request telephone (flight safety)
Abbreviated access request telephone (distress)
CALL PROGRESS
30 Call progress (PIC channel)
30 Call progress (R channel)
3 1 C channel assignment (distress)
32 C channel assignment (flight safety)
33 C channel assignment (other safety)
34 C channel assignment (non-safety)
CHANNEL INFORMATION
40 P/R channel. control (ISU)
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