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3. Table entries are defined as follows: A = action to be taken, S = the state to he entered. D = the diagnostic code to be used in
packets generated as a result of this action, DISCARD indicates that the received packet is to be cleared from the XDLP buffers,
and INVALID indicates that the packeflstate combination cannot occur.
Part I Annex 10 - Aeronautical Telecommunications
Table 5-16. GDLP (ADLP) effect on ADCE (GDCE) call setup and clearing states
711 1/96
No. 71
Packet received From
GDLP (ADLP)
(see Note 2)
ADCE (GDCE) call setup and clenring States
(See Notes 1, 7 and 8)
ADCE (GDCE)
GDLP (ADLP) ADCE (GDCE) GDLP (ADLP) C E AR
CALL CALL DATA CLEAR REQUEST to
READY REQUEST REQUEST TRANSFER REQUEST GDLP (ADLP)
PI ~2 I'3 ~4 ~6 I'7
Format error A=ERROR A=ERROR A=ERROR See Table 5-17 A=ERROR A=DISCARD
(see Note 3) (see Note 10) S=p7 S-p7 S=p7
S=p7 D=33 D=33 D=25
D=33 (see Note 6) (see Notes 6 & (see Note 6 )
(see Note 9) 9)
CALL REQUEST A=NORMAL A=ERROR Not applicable Not applicable A=ERROR A-DISCARD
(5.2.6.3.1) S=p7 (see Note 4) (see Note 4) S=p7
S=p2 0 - 2 1 0=25
(forward request (see Note 6) (see Note 6)
to DCE)
CALL ACCEPT A=ERROR A=ERROR A=NORMAL A=ERROR A=ERROR A=DISCARD
S=p7 S=p7 (5.2.6.3.1) S=p7 S=p7
D-20 0=2 1 S=p4 (forward D-23 D=25
(see Note 10) (see Note 6) to DCE), or (see Note 6) (see Note 6)
A=ERROR
S=p7
0=42
(see Note 6)
CLEAR REQUEST A=NORMAL A-NORMAL A=NORMAL A=NORMAL A=DISCARD A=NORMAL
(5.2.6.3.3) (5.2.6.3.3) (5.2.6.3.3) (5.2.6.3.3) (5.2.6.3.3)
S=p6 S=p6 S=p6 S-p6 S=pl
(do not forward) (forward to (forward to (foward to (do not forward)
DCE) DCE) DCE)
CLEAR A=ERROR A =ERROR A=ERROR A=ERROR A =ERROR A=NORMAL
CONFIRMATION S=p7 S=p7 S=p7 S=p7 S=p7 (5.2.6.3.3)
0=20 D=21 0=22 D=23 D=25 S=p 1
(see Nore 10) (see Note 6) (see Note 6) (see Note 6) (see Note 6) (do not forward)
DATA, intempt, flow A=ERROR A=ERROR A=ERROR See Table 5-17 A=ERROA A=DISCARD
control or resct packets S=p7 S=p7 S=p7 S=p7
D=20 D=2 1 0=22 D=25
(see Notes 9 & (see Notes 6 & (see Nates 5 & (see Note 6)
10) 9) 6)
NOTES:
1. The XDCE is not necessarily in the same state as the DTEJDCE interface.
2. All packets from the peer XDLP have been checked for duplication before evaluation as represented by this table.
3. There are no detectablc Mode S format errors.
4. The ADCE assigns all channel numbers used between the ADLP and GDLF', hcnce call collisions are not possible. When a CALL
REQUEST by GDLP packet is received bearing a temporary channel numher associated with an SVC in the p4 state, the
association of the temporary to permanent channel number is broken (5.2.5.1 -2.3).
5. Not applicable to the GDLP.
6. The error procedure consists of performing the actions specified when entering the p7 state (including sending a CLEAR
REQUEST packet to the peer XDLP) and additionally sending a CLEAR REQUEST packet to the DCE (via the reformatting
process).
7 . Table entries arc defined as follows: A - action to be taken, S = the state to be entered, D = the diagnostic code to be used in
packets generated as a result of this action, DISCARD indicates that the received packet is to be cleared from the XDLP buffers,
and INVALID indicates that the packedstate combination cannot occur.
8. The number in parentheses below an "A = NORMAL" table entry is the paragraph nurnkr in this document that defines the
actions to be taken to perform normal processing on the reccived packet. If no paragraph number is referenced, the normal
processing is defined in the table entry.
9. An error condition is declared and transfer to the p7 state is possible only if the ground DTE address is known unambiguously.
Otherwise the action is to discard the packet.
10. The error procedure consists of performing the action when entering the p7 state (including sending a CLEAR REQUEST packet
to the XDLP) but without sending a CLEAR REQWEST packet to the local DCE.
Annex 10 - Aero~uticulT elecommunicutions
Table 5-17. GDLP (ADLP) effect on ADCE (GDCE) reset states
Volume ZZZ
7/11/96
No. 71
Packet received from GDLP (ADLP)
(see Note 2)
ADCE (GDCE) met states (sec Notes 1, 4 and 5)
ADCE (GDCE)
OW CONTROL GDLP (ADLP) RESET REQUEST
READY RESET REQUEST to GDLP (ADLP)
dl d2 d3
RESET A=NORMAL A=DISCARD A =NORMAL
REQUEST (5.2.6.7) (5.2.6.7)
S=d2 S=dl
(forward to DCE) (do not forward)
RESET CONFIRMATION A=ERROR A=ERROR A=NORMAL
S=d3 S=d3 (5.2.6.7)
D=27 D=28 S=dl
(see Note 3) (see Note 3) (do not forward)
INTERRUPT See Table 5-18 A=ERROR A=DKSCARD
S=d3
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