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Not applicable
Invalidlrejecr call
8
Invalidreject call
Not applicable
11
Not applicable
Nor applicable.
8
Not applicable
Low priority administrative I 0 I 0 I None
Nore.- SNC priority value 255 (unspeci$ed) in call requesl/calK acceptedpacket should be mapped to Q number = 0, and none in
incoming calVcall connected pocket.
Annex 10 - Aeronautical Telecommunications Volume IZI
Table 4-27. DCE actions at restart, call setup, and call clearing states
DCE State
definition Action when entering state
rl PACKET LAYER
READY
r2 DTE RESTART
REQUEST
r3 DCE RESTART
INDICATION
P 1 READY
PZ DTE CALL
REQUEST
~3 DCE INCOMING
CALL
All VCs are returned to the pl state (sea pl state READY explanation) and
all PVCs are returned to dl, (flow control ready) state.
The DCE returns each VC to the pl state (see pl state explanation) and
issues a restart confirmation packet to the DTE.
The DCE returns each VC to the pl state (see pl state explanation) and
issues a restart indication packet to the DTE.
Release all resources assigned to VC channel.
Determine if sufficient resources exist to support request; if so, allocate
resources and forward IS0 8208 call request packet to IWF; if not, enter
DCE clear indication to DTE state (p7). Determination of resources and
allocation is as defined in IS0 8208.
Determine if sufficient resources exist to Support request; if so, allocate
resources and forward IS0 8208 incoming call packet to DTE; if not, send a
clear request packet to the IWE Determination of resources and allocation is
as dcfined in IS0 8208.
~4 DATA TRANSFER No action.
~5 CALL COLLISION Send a clear request packet to the IWF, corresponding to the incoming call
packet (the DTE in its call collision state ignores the incoming call), and
proceed with the DTE call request packct.
~6 DTE CLEAR Release all resources assigned to VC channel. Send an IS0 8208 clear
REQUEST confirmation packet to the DTE, a clear request packet to the IWF, and enter
pl state.
~7 DCE CLEAR Forward IS0 8208 clear indicatian packet to DTE.
INDICATION TO DTE
Note.- Stale nomenclature iiz this table nzay dtffer from that used in I S 0 8208.
Part I Annex 10 - Aeronautical Telecommunications
Table 4-28. DCE actions a t reset, interrupt, and flow control states
DCE state State definition Action when entering state
d 1 FLOW CONTROL READY No action.
d2 RESET REQUEST BY DTE Remove data packcts transmitted to DTE from window; discard
any data packets that represent partially transmitted M-bit
sequences and discard intermpt and intermpt confirmation packets
awaiting transfer to the DTE; reset all window counters to zero.
Send reset confirmation packet to DTE. Return channel to dl state.
d3 RESET INDICATION BY DCE Remove data packets trmsmitted to DTE from window; discard
TO DTE any data packets that represent partially transnutred M-bit
sequences and discard interrupt and intermpt confirmation packets
awaiting transFer to the DTE; reset all window counters to zero.
Send reset indication packet to DTE.
i 1 DTE INTERRUFT READY No action.
i2 DTE INTERRUPT SENT Forward interrupt packet received from DTE to IWF.
j 1 DCE INTERRUPT READY No action.
j 2 DCE INTERRUR SENT Forward interrupt packet received from IWF to DTE.
fl DCE RECEIVE READY No action.
f2 DCE RECEIVE NOT READY No action.
g 1 DTE RECEIVE READY No action.
82 DTE RECEIVE NOT READY No action.
Note.- State nomenclature in this table may difler from that used in IS0 8208.
Table 4-29. DCE state table - any state
DCE special cases
I
1 Received from DTE Any state 1
Any packet less than 2 octets in length
Any packet with an invalid general format identifier
Any packet with unassigned logical channel identifier
A = DIAG
D = 38
A = DIAG
D = 40
A = DIAG
D = 36
Any packet with a valid general format identifier and an assigned logical
channel identif er (includes a logical channel identif er of 0) See Table 4-30
Annex 10 - AeronnuticaE Telecommunications Volume 111
Table 4-30. DTE effect on DCE restart states
DCE restaa states (see Notes 6 and 7)
Packets having a packet type identifier shorter than see Table 4-31 A = ERROR A = DISCARD
1 octet with assigned logical channel identifier <> 0 S = r3
D = 38
(see Note 3)
Packet received from DTE
Packet supported by DCE other than restart with a A = DlAG A = DIAG A = DIAG
logical channel identifier of 0 D = 36 D = 36 D = 36
DTE RESTART DCE RESTART
Packet layer READY REQUEST INDICATION
　
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