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with with
D=244 D=244
CALL ACCEFT, CLEAR REQUEST, DATA, See Table 5-1 0 A=DISCARD A =DISCARD
INTERRUn, INTERRUPT CONFIRMATION, RESET
REQUEST
Note.- Table entries are defied as follows: A = action to be taken, S = the store 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 clearedfrom the XDLP buffers, and
INVALID indicates that the packehtate combination cannot occur:
Packet received fmm
XDCE
DCE call setup and clearing states (see Note)
DCE CLEAR
DTE CALL DCE CALL DATA CALL DTE CLEAR RWUEST to
READY REQUEST REQUEST TRANSFER COLLISION REQUEST DTE
PI ~2 ~3 P4 ~5 P6 p7
CALL REQUEST A =NORMAL INVALID INVALID INVALID INVALID INVALID INVALID
S=p3
(forward)
CALL ACCEPT A=DISCARD A=NORMAL INVALID INVALID INVALID A=DISCARD A =DISCARD
S=p4
(forward)
CLEAR =QUEST A=DISCARD A=NORMAL A=NORMAL A-NORMAL INVALTD A=DISCARD A=DfSCARD
S=p7 S=p7 S=p7
(forward) (forward) (forward)
DATA, INTERRUFT, A=DISCARD lNVALID INVALID See Table 5-11 INVALID A=DISCARD A=DISCARD
INTERRUPT
CONFIRM ATION, or
RESET REQUEST
Note.- Table entries are defined as follows: A = action to be taken. S = the state to be entered, D = the diagnostic code to be used in
packets generared as a result of this action, DISCARD indicates that the received packet is lo be clearedfrom the XDLP buflers, and
IWAWD indicates thar the packetlstate combinarion cannot occur:
Part I Annex 10 - Aeronautical Telecommunications
Table 5-16. GDLP (ADLP) effect on ADCE (GDCE) call setup and clearing states
5/1 Y98
No. 73
Packet received from
GDLP {ADLP)
(see Note 2)
ADCE (GDCE) call setup and clearing States
(See Notes 1, 7 and 8)
ADCE (GDCE)
GDLP (ADLP) ADCE (GDCE) GDLP (ADLP) CLEAR
CALL CALL DATA CLEAR REQUEST to
READY REQUEsT REQUEST TRANSFER REQUEST GDLP (ADD)
P I ' ~2 ~3 P4 P6 ~7
Formal m r A=ERROR A=ERROR A=ERROR Scc Table 5-17 A=ERROR A=DISCARD
(see Note 3) (see Note 10) S=p7 S=p7 S=p7
S=p7 0=33 0=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 D=2I D=25
(forward request (see Note 6) (see Note 6)
to DCE)
CALL ACCEm A=ERROR A=ERROR A=NORMAL A=ERROR A=ERROR A=DISCARL)
S=p7 S=p7 (5.2.6.3.1 ) S=p7 S=p7
D=20 0=2 1 S=p4 (fwward D=23 D=25
(see Note 10) (see Note 6) to DCE). or (see Note 6) (see Note 6)
A=ERROR
S=p7
D=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 (forward to (do not forward)
DCE) Dm
CLEAR A=ERROR A=ERROR A= ERROR A=ERROR A=ERROR A=NORMAL
CONFTRMATION s=p7 s=p7 S=p7 Ssp7 S=p7 (5.2-6.3.3)
D=20 D=21 D=22 D=23 D=25 S=pl
(see Note 10) (see Note 6) (see Note 6) (see Note 6) (see Note 6) (do not forward)
DATA, intermpt, flow A=ERROR A= ERROR A=ERROR See Table 5-17 A=ERROR AzDISCARD
contral or =set packets S=p7 S=p7 S=p7 S=p7
D=20 D=2 1 D=22 D=25
(see Notes 9 & (see Notes 6 & (see Notes 5 & (see Note 6)
10) 9) 6)
NOTES:
1. The XDCE is not necessarily in the same smte as the DTEIDCE interface.
2. All packets from the peer XDLP have been checked for duplication before evaluation as represented by this table.
3. A format error may result from an S-bit sequence having a first or intermediate packet shorter than the maximum length, or else
from an invalid LV field in a CALL REQUEST, CALL ACCEFT, CLEAR REQUEST or INTERRUPT packet. There are no
other detectable Mode S format errors.
4. The ADCE assigns all channel numbers used between the ADLP and GDLP, hence call coilisions are not possible. When a CALL
REQUEST by GDLP packet is received bearing a temporaq channel number 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 are defined as folbws: 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 huffers,
md INVALID indicates that the packetlstate combination cannot occur.
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