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Meteorological communications
Flight regularity communications
Aeronautical information services
messages
Aeronautical administrative messages,
networWsystems administration
Reserved
Urgent priority administrative and UN
Charter communications
High priority administrative and
State/Government communications
Normal priorityladministrative
Low priority administrative
Note 1.- SNC prioriry value 255 (unspecified)
in incoming calVcall connected packet.
Note 2.- NetworWsystem managemcnr and administration am not categories of end-user messages, but are used by the ATN or
other network managcmenI/rrdministration.
SNC priority in INCOMING
CALWCALL CONNECTED
packet
None
Not applicable
14
Not applicable
Not applicable
11
Not applicable
Not applicable
8
7
6
5
Not applicable
3
2
1
None
to Q number = 0, and none
SNC priority in CALL
REQUESTICALL
ACCEPTED packet
255
254- 15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
in call requesr/call accepted
PriorityIQ number mapping
Q number
0
Invalidlreject call
14
Invalidlreject call
Invalidlreject call
11
Invalidreject call
Invalidlreject call
8
7
6
5
Invalidlreject call
3
2
1
0
packet should be mapped
Annex 10 - Aeronautical Telecommunications Volume 111
Table 4-27. DCE actions at restart, call setup, and call clearing states
State
definition Action when entering state
PACKET LAYER All VCs are returned to the pl state (see pl state READY explanation) and
READY all PVCs are relurned to dl, (flow control ready) state.
DTE RESTAFS Thc DCE returns each VC to the pl state (see pl state explanation) and
REQUEST issues a restart confirmation packet to thc DTE.
DCE RESTART The DCE returns each VC to the pl state (see pl state explanation) and
INDICAnON issues a restart indication packet to the Dm.
READY Release all resources assigned to VC channel.
DTE CALL Determine if sufficient resources exist to support request; if so, allocate
REQUEST resources and forward IS0 8208 call request packet to IWF; if not, enter
DCE clear indication to DTE state (p7). Determination of resources and
allocation is as defined in IS0 8208.
I ~3 DCE INCOMING Determine if sufficient resources exist to support request; if so, allocate
CALL resources and forward IS0 8208 incoming call packet to DTE; if not, send
a clear request packet to the WF. Determination of resources and
allocation is as defined in IS0 8208. I p4
DATA TRANSFER No action.
~5 CALL COLLISION Send a clear request packet to the IWE, corresponding to the incoming call
packet (the DTE in its call collision state ignores the incoming call), and
proceed with the DTE call request packet.
p6 D E CLEAR Release a11 resources assigned to VC channel. Send an IS0 8208 clear
REQUEST confirmation packct to the DTE, a clear request packet to the WE and
enter pl state.
1 ~7 DCE CLEAR Forward IS0 8208 clear indication packet lo DTE.
INDICATION TO DTE I Nok- State nommclorure in this table may dfler+t?om thot used in IS0 8208 -- ---.*---, --
Part I Annex 10 - Aeronautical Telecommunications
Table 4-38. Circuit-mode -link interface data units
HDU
1. Access request - telephone
2. Call announcement
3. C channel assignment
4. Call inFormation - service address
5. Call progress - call attempt result
6. Call progress - channel release
7. Call progress - data mode
8. Call progress - test
9. Call progress - connect
10. Telephony acknowledge
LTCT parameters
Message type (all)
AES ID (all)
GES ID (all)
Q number (all)
Application reference number (all)
Source (1,2)
Service direction (1,2)
Servicc LD (1,2)
Network ID (1)
Circuit data rate (1,2)
Voice channel characteristics (1,2)
Called terminal (2)
Calling terminal ( l,4)
Initial EIRP (3)
Receive channel frequency (3)
Transmit channel frequency (3)
Report type (5,6,7,8,9)
S (5,6)
Location (5,6)
Causc class (5,6)
Causc value (5,6)
Digit 0,l (1)
Digit 2-9 (1,4)
Acklnack (1 0)
Routing (5,6,10)
Message type of missing CM-LIDU (10)
Annex 10 - Aeronautical Telecommunications
Table 4-39. AES outgoing procedure - interworking telephony events
Volume III
Parameter mapping Toffrom interworking
requiremenrs interface with
　
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