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that the packctistate combination cannot occur,
"- -
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No. 77
Annex 10 - Aeronaufical Telecommunications Volume III
Table 5-7. DTE effect on DCE interrupt transfer states
DTE/DCE interrupt transfer states (see Note 2)
CPacket received from DTE
INTERRUPT
(see Note 1)
DTE INTERRUPT READY DTE INTERRUPT SENT
i 1 i2
A=NORMAL
S=i2
(forward)
A=ERROR
S=d3
D=44
(see Note 3)
Packet recc~ved from DTE
DTE/DCE interrupt transfer states (see Note 2)
DCE INTERRUPT READY DCE INTERRUPT SENT
j l 12
INTERRUPT CONFIRMATlON
(see Note 1)
A=ERROR
S=d3
D=43
(see Note 3)
A=NORMAL
S=j1
(forward)
NOTES:
1. If the packet has a format error, then the error procedwc applies (see Note 3). Interrupt packets with user data greater than 32 bytes should
be trcatcd as a format error
2. 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
indicates that the packevstate combination cannot occur.
3. 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 scnding a RESET REQUEST packet to the XDCE (via the reformatting process).
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No. 77
Part 1 Annex 10 - Aeronautical Te1ecommunication.s
Table 5-8. DTE effect on DCE flow control transfer siates
I I DCE ilow control transfer states (see Notes 2 and 3) I
DATA packet with invalid PR
Packet received from DTE
A=ERROR
S=d3
D=2
(see Note 4)
DCE RECElVE READY DCE RECEIVE NOT READY
fl fl
DATA packet with valid PR but invalid A =ERROR
PS or user data field with improper S=d3
format D- 1 (invalid PS)
D=39 (UD > max negotiated length)
D=X2 (UD unaligned)
(see Note 4)
DATA packet with less than 4 bytes A-ERROR A=DISCARD
when using modulo 128 numbering S=d3
D=38
(see Note 4)
DATA packet with valid PR with M-bit
set to 1 when the user data field is
partially full
A=ERROR
S=d3
D=165
(see Note 4)
A=ERROR
S=d3
D=2
(see Note 4)
A=DISCARD
(process PR data)
A=DISCARD
(process PR data)
DATA packet with valid PR, PS and user A =NORMAL A=DISCARD
data field format (forward) (process PR data)
DCE flow control transfer states (see Notes 2 and 3)
RR, RNR, or REJECT packet with an
invalid PR
Packet received from DTE
A =ERROR
S=d3
D=2
(see Note 4)
DTE RECEIVE READY DTE RECEIVE NOT READY
gl g2
A=ERROR
S=d3
D=2
(see Notc 4)
RR, RNR, or REJECT packet with less A=DISCARD A=DlSCARD
than 3 bytes whcn using
modulo 128 numbering (see Note 1)
1 RR packet with a valid PR A=NORMAL A=NORMAL I
RNR packet with a valid PR
REJECT packct with a valid PR
NOTES:
1 The rejcct procedures arc not required.
2. The RR, RNR and REJECT procedures are a local DTEIDCE matter and the corresponding packets are not forwarded to the XDCE.
3. Table entries arc dctincd as follows: A = aclion to be taken, S = the state to bc c n t e ~ dD, = (he diagnostic code to be used in packets generated
as a result of this action, DISCARD indicates that the received packet is to be cleared rrom [he XDLP buffers, and INVALID indicates that
the packetlstatc combination cannot occur.
4. Thc error procedure consists of performing the specified actions whcn entering the d3 stale (which includes forwarding a RESET REQUEST
packet to the DTE) and sending a RESET REQUEST packet to thc XDCE (via the reformatting process).
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No. 77
Annex I0 - Aeronautical Telecorn~nunications
Table 5-9. XDCE effect on DCE restart states
Volume ZII
Table 5-10. XDCE effect on DCE call setup and clearing states
Packet received from XDCE
DCE restart states (see Notc)
PACKET LEVEL WTE RESTART REQUEST DCE RESTART REQUEST
READY r2 r3
rl
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No. 77
CALL REQUEST See Table 5-10 Scnd CLEAR REQUEST to Send CLEAR REQUEST to
reformatting process with reformatting process with
D=2U D=244
CALL ACCEPT, CLEAR REQUEST, DATA, See Table 5-10 A=DISCARD A=DISCARD
INTERRUPT, INTERRUPT CONFIRMATION, RESET
REQUEST
Note.- Table entries are defined as follows: A = action to be tuken, S = the state to be entered, W = the diagnostic code to be used in
packets generated as a result of this aclion, DISCARD indicates that the received packet is to be clearedfrom the XDLP buflers, and INVALID
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