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Table 5-8. DTE effect on DCE flow control transfer states
7/11/96
No. 71
Packet received from DTE
DCE flow control transfer states (see Notes 2 and 3)
DCE RECEIVE READY DCE RECEIVE NOT READY
fl fz
DATA packet with less than 4 bytes A=ERROR A=DISCARD
S=d3
D=38
(see Nole 4)
DATA packet with invalid PR A=ERROR A=ERROR
S=d3 S=d3
0=2 0=2
(see Note 4) (see Note 4)
DATA packet with valid PR but A=ERROR A=DISCARD
invalid PS or user data field with S=d3 (process PR data)
improper format D= 1 (invalid PS)
D=39 (UD > max negotiated length)
0=82 (UD unaligned)
(see Note 4)
DATA packet with valid PR with A=ERROR A=DISCARD
M-bit set to 1 when the user data S=d3 (process PR data)
field is partially full D=165
(see Note 4)
DATA packet with valid PR, PS A=NORMAL A=DISCARD
and user data field format (forward) (process PR data)
Packet received from DTE
DCE flow control transfer states (see Notes 2 and 3)
DTE RECEIVE READY DTE RECEIVE NOT READY
gl g2 .
RR, RNR, or REJECT packet with A=DISCARD A=DISCARD
less than 4 bytes (see Note 1)
RR, RNR, or REJECT packet with an A=ERROR A=ERROR
invalid PR S=d3 S=&
D=2 D=2
(see Note 4) (see Note 4)
RR packet with a valid PR A=NORMAL A=NORMAL
S=g 1
RNR packet with a valid PR A=NORMAL A=NORMAL
S=g2
RElECT packet with a valid PR A=NORMAL A=NORMAL
S=g 1
NOTES:
1 . The reject procedures are not required.
2. The RR, RNR and RWECT procedures are a local DTWDCE matter and the corresponding packets are not forwarded to the XDCE.
3. Table entries are defined as follows; A = action to be taken, S = the state to be cntered, 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 packedswte combination cannot occur.
4. The error procedure consists of performing the specified actions when cntering the d3 state (which includes forwarding a RESET
REQUEST packet to the DTE) and sending a RESET REQUEST packet to the XDCE (via the reformatting process).
Annex 10 - Aeronautical Telecommunications
Table 5-9. XDCE effect on DCE restart states
Volume III
Table 5-10. XDCE effect on DCE call setup and clearing states
Packet received from XDCE
DCE restart states (see Note)
PACKET LEVEL DTE RESTART DCE RESTART
READY REQUEST REQUEST
rl r2 r3
7/11/96
Nu. 71
CALL REQUEST See Table 5-10 Send CLEAR Send CLEAR
REQUEST to REQUEST to
reformatting process reformatting process
with with
D=244 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 = uccion to he mken, 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 packer is to he clearedfrom the XDLP buffers, and
INKALID indicates that the packet/srare combination cannot occur:
Packet received from
XDCE
DCE call setup and clearing states (see Note)
DCE CLEAR
DTE CALL DCE CALL DATA CALL DTE CLEAR REQUEST to
READY REQUEST REQUEST TRANSFER COLLISION REQUEST DTE
PI ~2 P3 P4 P5 ~6 , , , , , , , ~7,.,
CALL REQUEST A=NORMAL rNVALXD INVALID INVALID INVALID INVALID INVALID
S=p3
(forward)
CALL ACCEPT A =DISCARD A=NORMAL INVALlD INVALID INVALID A=DISCARD A=DISCARD
S=p4
(fo~wnrd)
CLEAR REQUEST A=DISCARD A=NOKMAL A=NORMAL A=NORMAL INVALID A=DISCARD A=DISCARD
S=p7 S=p7 S=p7
(forward) (forward) (forward)
DATA, INTERRUFT, A=DJSCARD INVALID INVALID See Table 5- 11 INVALID A=DISCARD A=DISCARD
INTERRUPT
CONFIRMATION, or
RESET REQUEST
Note.- Tablc entries are defined as follows; A = action ro he mken, S = the state to be entered, D = the diagnostic code to be used in
packets generared as a resulc nJ this actioti, DISCARD indicates that the ~rceivedp acket is lo he cleared,frorn the XDLP buffers, ond
INVALID indicates that the packet/state combination cannot oc~icr:
Annex 10 - Aeronautical Telecommunican'ons
Table 5-11. XDCE effect on DCE reset states
7/11/96
No. 71
r
Packet reccivcd from XDCE
DCE reset states {sw Note)
now CONTROL DCE RESET
READY DTE RESET REQUEST REQUEST to DTE
dl d2 d3
RESET REQUEST A=NORMAL A=NORMAL A=DISCARD
S=d3 S=dl
(forward) (forward)
INTERRUPT See Table 5-12 A=DlSCARD A=DISCARD
INTERRW CONFIRMATION See Tablc 5-12 A=DISCARD INVALID
DATA A=NORMAL A=DISCARD A=DISCARD
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