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referenced, the normal processing is defined in the table entry.
4. If the packet is acceptable to the state of the logical channel (i,e. action = normal) but contains a format emor, then the DCE
shall initiate a connection reset procedrrrc (diagnostic codes that may apply include 38, 39, 81, 82). --
Part Z Annex 10 - Aeronautical Telecommunications
Table 4-33. DTE effect on DCE interrupt transfer states
I 1 DTUoCE INTERRUPT TRANSFER STATES ( s e e G r 2 and 3) 1
Packet received from DTE 1 DTE INTERRUPT READY DTE INTERRUPT SENT
il i2
1 INTERRUPI. (see Note 1) A = NORMAL (6.8.2) A = ERROR
S = i2 (forward) S = d3
D = 44 (see Note 4)
Packet received from DTE
/ DTUDCE INTERRUPT TRANSFER STATES (see Notes 2 and 3) 1 DCE INTERRUPT READY DCE INTERRUPT SENT
j 1 j2
INTERRUPT CONFIRMATION
(see Notc 1)
A,= ERROR
S = d3
D = 43
(see Note 4)
A = NORMAL
(6.8.3)
S = j l
(forward)
NOTES:
1. If the packct is acceptable to the stare of the logical channel (i.e. action = normal) but contains a format error,
then the error procedure applics (see Note 4).
2. Table entries are defined as follows: A = action to be taken. S = the state to be entercd, and D = the diagnostic
code to be used in packets generated as a result of this action.
3. The number in parentheses below an "A = normal" table entry is the paragraph number in IS0 8268, second
edition. The DCE shall take the same action as those taken by the DTE to perform normal processing on the
received packet. If no paragraph is referenced, the normal processing is defined in the table entry.
4. Thc error procedure consists of performing Lhe specified actions when entering the d3 state (which includes
forwarding a reset indication packet to the DTE) and sending a reset requcst packet to the XWF.
Annex 10 - Aeronautical Telecommunications Volume I11
Table 4-34. DTE effect on DCE flow control transfer states
1 Packet received from DTE
DCE flow control transfer states (see Note 2)
DCE RECEIVE READY
fl
DCE RECEIVE
NOT READY
d
DATA packer with invalid PR
DATA packet with valid PR but invalid PS or
user data field with improper format
DATA packet with valid PR with M-bit set to
1 when the user data field is partially full, or
the D-bit set to 1 (when not supported)
DATA packet with valid PR, PS and user data
field with proper format
A = ERROR
S = d3
D = 2
(see Note 4)
A = ERROR
S = d3
D = (see Note 5)
(see Note 4)
A = ERROR
S = d3
D = 165 or 166
(see Note 4)
A = NORMAL
(forward)
A = ERROR
S = d3
D = 2
(see Note 4)
A = DISCARD
(process PR data)
A = DISCARD
(process PR data)
A = DISCARD
(process PR data)
(see Note 7)
1 Packet received from DTE
DCE flow control transfer stales (see Notes 2 and 3)
DTE RECEIVE
READY
gl
DTE RECEIVE
NOT READY
82
RR, or RNR packet with an invalid PR
RR packet with a valid PR (see Note 6)
RNR packet with a valid PR (see Note 6)
A = ERROR
S = d3
D = 2
(see Note 4)
A = NORMAL
(4.7.1.5)
A = NORMAL
(4.7.1.6)
s = g2
A = ERROR
S = d3
D = 2
(see Note 4)
A = NORMAL
(4.7.1.5)
S = gl
A = NORMAL
(4.7.1.6)
NOTES:
1. The RR and RNR procedures are a local DTEIDCE matter and the corresponding packets are not forwarded to the IWE
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, and discard indicates that the received packet is to be cleared from the buffers.
3. The number in parentheses below an "A = normal" table enuy is the paragraph number in IS0 8208, second edition. The DCE shall
take the same action as those taken by the DTE to perform normal prwessing on the received packet. If no paragraph is referenced,
the normal processing is defined in the table entry.
4. The error procedure consists of performing the specified actions when entering the d3 state (which includes forwarding a reset
indication packct to thc DTE) and sending a reset request packet to the IWF.
5. The diagnostic codes are as follows: D = 1 for invalid PS; D = 39 for a user data field greater than 128 octets; D = 82 for a user
data field not octet aligned.
6. For RR, RNR, or REJECT packets, the presence of one or more octets beyond thc third octet is considered an error. Although a
valid P(R) may be accepted to update the status of outstanding data packets, the DCE shall invoke the error procedure m defined in
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