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Logical channel number
DTE address length
Called DTE **
Calling Dm **
Called NSAP *
Calling NSAP *
Facility field length *
Facilities *
Call user data *
Figure 4-14. Connection request SNPDU format
M
Logical channel number
Additional fields
depending on SNPDU type
D SNPDU type identifier
Part 1 Annex 10 - Aeronuuti'cal Telecommunications
Bits
I Logical channel number 1
Called NSAP address *
Facility field length *
Facilities * !------
Call user data *
* if present
Figure 4-15. Connection confirm SNPDU format
Bits
C
t 2 Logical channel number
1 Diagnostic code
e
t
Clear user data * 1 I
Called NSAP address *
* if present I
Figure 4-16. Connection released SNPDU format
Annex 10 - Aemn~uticalT ele~~rnrnunicrrh'uns Volume 111
Bits
* 2 1 Logical channel number 1
Figure 4-17. Connection release complete
SNPDU format
C
t Logical channel number
e Interrupt user data
t
S '2
Figure 4-19. Interrupt data SNPDU format
Bits
8 7 6 5 4 3 2 1
Figure 4-18. Data SNPDU format
C
t 2
3
t
s
Bits
O l M D l l O O O O
Logical channel number
SNPDU number
User data
Figure 4-20. Interrupt confirm SNPDU format
t 2
e
Logical channel number
P m I Annex 10 - Aeronuutical aklecomrnunicutions
Figure 4-21. Reset SNPDU format
Bits
8 7 6 5 4 3 2 1
Bits
C
t 2
3
t
s 4
c
t Logical channel number
3 Flow control reason
t --
0 1 0 0 1 1 0 0 1 1
Logical channel number
Resetting cause
Diagnostic code
SNPDU number 1
Figure 4-23. Flow control (suspend) SNPDU farmat
Bits
2 1 Logical channeI number 1
Figure 4-22. Reset confirm SNPDU format
Bits
Flow control reason
t 2
e
Figure 4-24. Flow control (resume) SNPDU format
Logical channel number
Annex 10 - Aeronuuticd Talecommunications Volume ZII
Code:
Bits
8 7 6 5 4 3 2 1
* The four bits indicating each throughput class are binary
coded and correspond to throughput classes as indicated on
the right
Parameter field:
Bits: 8765
or
Bits: 4321
Throughput class
(bitsls)
as defined in
ISO-8208
from the
called DTE *
Reserved
Reserved
Reserved
75
150
300
600
1200
2400
4800
9600
19200
48000
64000
Reserved
Reserved
from the
calling DTE *
Figure 4-25. Throughput class negotiation (TCN) facility field
Code:
Bits
Parameter field: Octet 1
Figure 4.26. Transit de!ay selection and indication facility format
Transit delay expressed in
millisecond (higher order bits)
Octet 2 Transit delay expressed in
millisecond (lower order bits)
Part Z Annex 10 - Aerunauticol Telecommunications
Code:
Bits
Figure 4-27. Fast select (use not permitted)
facility format
' 8 7 6 5 4 3 2 1
Code:
Parameterfield: [ O
Bits
8 7 6 5 4 3 2 1
I l l
Figure 4-28. Expedited data negotiation ("510 nse of
expedited data") facility format
0 0 0 0 0 0 0
Annex 10 - Aeronautical Telecommunications Volume I11
Figure 4-29. Connection establishment and release state diagram
Part Z Annex 10 - Aeronuutical Telecommunications
RESET CONFIRM RESET CONFIRM
PACKET or Error '
;FLOW CONTROL
NOT READY
Figure 4-30. Reset and flow control state diagrams within the data transfer state
Figure 4-31. ISO-8208 DCE sub-state hierarchy
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Appendix 1 to Chapter 4
RESPONSE MASKS OF .A-BPSK AND A-QPSK FILTERS
Table Al-1. Required filter amplitude versus frequency
response limits for A-BPSK
Upper bound Lower bound I
The. mask shall be defined by drawing straight lines through the above points where frequencies are
normalized to the channel rate divided by 2, and the amplitude is normalized to 0 dB at a frequency of 0.
This mask is illustrated in the guidance material.
Normalized Amplitude
frequency response (dB)
Table Al-2. Required filter phase versus frequency response
Limits for A-BPSK and A-QPSK
Normalized Amplitude
frequency response (dB)
Upper bound
Normalized Phase
frequency response (deg)
Lower bound I
Normalized Phase
frequency response (deg)
The mask shall be defined by drawing straight lines through the above points where frequencies are
　
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