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(see Note 1) rl (see Note 4) r2 (see Note 5) r3
Packet with a packet type identifier which is undefined see Table 4-31 A = ERROR A = DISCARD
or not supported by DCE and with assigned logical S = r3
channel identjfer <r 0 D = 33
(see Note 3)
Restart request, or restart confirmation packet with a see Table 4-3 1 A = ERROR A = DISCARD
logical channel identifier cr 0 S = r3
D = 41
(see Note 3)
Restart request
Restart confirmation
A = NORMAL A = DISCARD A = NORMAL
(see Note 1) (4.2)
S = 1'2 S = pl or dl (see
Note 2)
A = ERROR A = ERROR A = NORMAL
S = r3 S = r3 (4.4)
D= 17 D= 18 S = pl or dl (see
(see Note 8) (see Note 3) Note 2)
Restart request or restart confirmation packet with A = DIAG A = DISCAICD A = ERROR
format error D = 38, 39, 81, or D = 38, 39, 81, or
82 82
Call setup, call clearing, data, interrupt, flow control, see Table 4-3 1 A = ERROR A = DISCARD
or reset packet S = 1-3
D= 18
Packets having a packet type identifier shorter than A = DIAG A = ERROR A = DISCARD
1 byte and a logical channel identifier equal to 0 D = 38 S = r3
D = 38
Packet with a packet type identifier which is undefined A = DIAG A = ERROR A = DISCARD
or not supported by DCE and a logical channel identifier D = 33 S = 1-3
equal to 0 D = 33
(see Note 4)
NOTES:,
1. Receipt of a restart request packet causes the DCE to issue a clear request packet to the WF for each VC associated with the DCE
entity.
2. The VC channels are returned to state pl, the PVC channels are returned to state dl.
3. No action is taken by the DCE.
4. The restart request packet is not fonvardcd to the IWE
5. The DCE upon entering the r3 state checks for the completion of r2 processing and issues an IS0 8208 restart indication packet to
the DTE, when the 1-3 state is entered via the r2 state. If the r3 state is not entered via the t2 state, the DCE pei"forms all of the
actions normally performed when entering r2 and issues an IS0 8208 restart indication packet to the DTE, and send a clear request
packet to thc XWF for each VC associated with the DCE entity.
6. Table entries are defined as follows: A = action to be taken, S = state to be entered, D = diagnostic code to be used in packets
generated as a result of this action, and discard indicates that the received packet is to be cleared from the buffers.
'7. The number in the parentheses below an "A = normal" table entry is the paragraph number in IS0 8208, second edition. The DCE
shall take thc same action as the one laken by the DTE, acting as a DCE, to perform nominal processing On the received packet. If
no paragraph number is referenced, the normal processing is defined in the table entry.
8. The emor procedure consists of entering the r3 state and sending a restart indication packet to the DTE.
Part I Annex 10 - Aeronautical Telecommunications
Table 4-31. DTE effect on DCE call setup and clearing states
Packet received
from DTE
DCE call setup and clearing states (see Notes 5 and 6)
DCE CALL DCE CLEAR
DTE CALL INCOMING DATA COLLISION DTE CLEAR INDICATION
READY REQUEST CALL TRANSFER p5; see REQUEST TO DTE
PI ~2 ~3 P4 Notes 1 and 4 ~6 p7
Packet having a packet A = ERROR A = ERROR A = ERROR see Table 4-32 A = ERROR A = ERROR A = DISCARD
type idenlifier shorter S = p7 S = p7 S = p7 S = p7 S = P7
than 1 octet D = 38 D - 38 D-38 D=38 D = 38
see Note 2 see Note 2 see Note 2 sec Note 2
Packet having a packet A = ERROR A = ERROR A = ERROR scc Table 4-32 A = ERROR A = ERROR A = DISCARD
type identifier which is S = p7 S = p7 S = p7 S - p7 S = p7
undefined or not D = 33 D = 33 D = 33 D = 33 D = 33
supported by DCE see Note 2 see Note 2 see Note 2 see Note 2
RESTART REQUEST, A = ERROR A = ERROR A = ERROR see Table 4-32 A = ERROR A = ERROR A = DISCARD
or RESTART s = p7 s = p7 s =p7 s = p7 s = p7
CONFIRMATION D = 41 D=41 D = 41 D=41 D = 41
packet with logical see Note 2 see Note 2 see Note 2 sce Note 2
channel identifier
not = 0
CALL REQUEST A = NORMAL A = ENOR A = NORMAL A = ERROR A = ERROR A = ERROR A = DISCARD
(5.2.2) S = p7 (5.2.5) S = p7 S = p7 S = p7
S = p2 D=21 S = p5 D - 23 D = 24 D = 25
(forward) see Note 2 see Note 2 see Note 2 see Note 2
CALL ACCEPTED A = ERROR A = ERROR
S = p7 S = p7
D = 20 D = 21
see Note 2
CLEAR REQUEST A = NORMAL A = NORMAL
(4.5.5.2) (4.5.5.2)
S = p6 S = p6
(forward)
A = NORMAL
(5.2.4)
S = p4(Frd)/
A = ERROR
S = p7
D = 42; see
Notes 2 and 3
A = NORMAL
(4.5.5.2)
S = p6
(forward)
A = ERROR
S = p7
D = 23
see Note 2
A = NORMAL
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