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than 1 byte D=38 D=38 0=38 D=38 D=38
(see Note 2) (see Note 2) (see Note 2) (see Note 2)
Packets having a packet A=ERROR A=ERROR A=ERROR See Table 5-6 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=EMOR A=ERROR See Table 5-6 A=ERROR A=ERROR A=DISCARD
RESTART S=p7 S=p7 S=p7 S=p7 S=p7
CONHRMATION or D=41 D=41 D=41 0=41 D=41
REGISmTION (see Note 2) (see Note 2) (see Note 2) (see Note 2)
packet with logical
channel identifier
unequal to 0
CALL REQUEST A=NORMAL A=ERROR A=NORMAL A=ERROR A=ERROR A=ERROR A=DISCARD
S=p2 S=p7 S=p5 S=p7 s=p7 S=p7
(forward) 0=2 1 D=23 D=24 D=25
(see Note 2) (see Note 2) (see Note 2) (see Note 2)
CALL ACCEPT A=ERROR A=ERROR A=NORMAL A=ERROR A=ERROR A=ERROR A=DISCARD
s=p7 S=p7 S=p4 s=p7 S=p7 S=p7
D=20 D=21 (Forward) D=23 D=24 D=25
(see Note 2) or A=ERROR (see Note 2) (see Notes 2 nnd (w Note 2)
S=p7 4)
D=42
(see Notes 2
and 3)
CLEAR REQUEST A=NORMAL A=NORMAL A=NORMAL A=NORMAL A=NORMAL A=DISCARD A=NORMAL
S=p6 S=p6 S=p6 S=p6 S=p6 S=p 1
(forward) (forward) (forward) (forward) (do not forward)
CLEAR A =ERROR A=ERROR A =ERROR A=ERROR A=ERROR A=ERROR A=NORMAL
CONFIRMATION S=p7 S=p7 S=p7 S=p7 S=p7 S=p7 S=p I
D=20 D=2 1 0=22 D=23 D=24 D=25 (do not forward)
(see Note 2) (see Note 2) (see Note 2) (see Note 2) (see Note 2)
DATA, interrupt, flow A=ERROR A=ERROR A=ERROR See Table 5-6 A=ERROR A=ERROR A=DISCARD
control or reset packets S=p7 S=p7 S=p7 S=p7 S=p7
D=20 D=2 1 0=22 0=24 D=25
(see Note 2) (see Note 2) (see Note 2) (see Note 2)
NOTESI.
On entering the p5 state, the DCE rea.signs the outgorng call to the DTE to another channel (no CLEAR REQUEST is issued) and responds to
incoming DTE call as appropriate with a CLEAR REQUEST or CALL ACCEPT packet.
2. The error procedure consists of performing the actions specified when entering the p7 state (including sending a CLEAR REQUEST packet to the
DTE) and additionally sending a CLEAR REQUEST packet to the XDCE (via the reformatting process).
3. The use of the fast select facility with a restriction on the response prohibits the DTE from sending a CALL ACCEPT packet.
4. The DTE in thc event of a call collision must discard the CALL REQUEST packet received from the DCE.
5. 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 generated as
a result of this action, DISCARD indicates that the received packet IS to be cleared from the XDLP buffers, and INVALID indrcates that the
packetislate combination cannot occur.
Part Z Anne.~1 0 - Aeronautical Tebcommuiticatioions
Table 5-6. DTE effect on DCE reset states
DCE reset states (see Note 2)
FLOW CONTROL RESET REQUEST DCE RESET REQUEST
Packet received from DTE
Packct with a packet type identifier shorter than I byte A=ERROR
S=d3
D=38
(see Notc 1)
A=ERROR
S=d3
D=38
(see Note 1)
Packet with a packet type identifier which is undefined or
not supported by DCE
A=ERROR
S=d3
0 - 3 3
(see Note 1)
A=ERROR
S=d3
D=33
(see Note 1)
RESTART REQUEST, RESTART CONFIRMATION, or
REGISTRATION (if supported) packet with logical
channel identifier unequal to 0
A=ERROR
S=d3
D=41
(see Notc 1)
A=ERROR
S=d3
D=41
(see Note 1)
RESET
REQUEST
A=NORMA L
S=d2
(forward)
A=NORMAL
S=d 1
(do not forward)
RESET CONFIRMATION A= ERROR
S=d3
D=27
(see Note I )
A=ERROR
S=d3
D=28
(see Note 1)
A=NORMAL
S=dI
(do not forward)
INTERRUPT packet See Table 5-7 A=ERROR
S=d3
D=28
(see Note 1)
A=ERROR
S=d3
D=28
(see Note 1)
INTERRWT CONFIRMATION packet See Table 5-7
DATA or flow conbol packet See Table 5-8 A=ERROR
S=d3
D=28
(see Note 1)
A=ERROR
S=d3
D=37
(see Note 1)
REJECT supported but not subscribed to A=ERROR
S=d3
D=37
(see Note 1)
NOTES:
1. Thc error procedure consists of performing the specified actions when entering the d3 state (which includes forwarding a RESET REQUEST
packet to the DTE) and sending a RESET REQUEST packet lo the XDCE (via thc formatting function).
2. Table entries are defincd as follows: A = action to be taken, S = the state to be entered, D = the diagnostic codc to be used in packets
gcncratcd as a result or this action, DISCARD indicates that the received packet is to be cleared for the XDLP buffers, and INVALID
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