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field indicating "local procedure error" and thc diagnostic
code indicating "packet type invalid when in
flow control ready state";
b) if the centre is a PVC transit centre for the PVC
assigned to the logical channel, and the corresponding
logical channel is in the flow control ready state,
execute the procedure for rcset on the corresponding
logical channel with the resetting cause field indicating
"remote procedure error" and the diagnostic code
indicating "packet type invalid when in flow control
ready state".
8.6.6.2.7.5.2 A centre which receives a valid RESET
CONFIRMATION when the logical channel is in the reset
state shall:
a) cancel T22;
b) cause the logical channel to enter the flow control
ready state;
c) if the centre is a PVC termination centre for the PVC
assigned to the logical channel, notify the CDIN
packet level that the PVC assigned to the logical
channel is usable.
8.6.6.2.7.5.3 A centre which receives a valid RESET
CONFIRMATION when the logical channel is in the restart
or unassigned stale shall discard the RESET
CONFIRMATION.
8.6.6.2-7.5.4 A centre which receives a non-valid
RESET CONFIRMATION shall:
a) if the logical channel is in the reset state:
1) execute the procedure for reset with the resetting
cause field indicating "local procedure error" and
the appropriate diagnostic code;
2) if the centre is a PVC transit centre for the PVC
assigncd to the logical channel, and the con-esponding
logical channel is in the flow control
ready state, execute the procedfire for reset on lhe
corresponding logical channel with the resetting
causc field indicating "remote procedure error" and
the appropriate diagnostic code;
Annex 10 - Aeronautical Telecommunicatio?zs Volume ZZZ
b) if the logical channel is in the flow control ready state:
1) execute the procedure for reset with the resetting
cause field indicating "local procedure error" and
the diagnostic code indicating "packet type invalid
when in flow control ready state";
if the centre is a PVC transit centre for the PVC
assigned to the logical channel, and the
corresponding logical channel is in the flow
control, ready state, execute the procedure for reset
on the corresponding logical channel with the
resetting cause field indicating "remote procedure
erros" and the diagnostic code indicating "packet
type invalid when in flow control ready state";
c) if the logical channel is in the restart or unassigned
state, discard the RESET CONFIRMATION.
8.6.6.2.7.6 When T22 expires, the centre shall:
a) execute the procedure for reset with the resetting cause
field indicating "local procedure error" and the diagnostic
code indicating "timer expired for reset";
b) if the centre is a PVC transit centre for the PVC
assigned to the logical channel, and the corresponding
logical channcl is in the flow control ready state,
execute the procedure for reset on the corresponding
logical channel with the resetting cause field indicating
"remote procedure error" and the diagnostic code
indicating "timer expired for reset".
Note.- Afrer unsuccessful retries, the logical
channel should be considered out of order The
RESTART procedure should only be invoked for
recovery if reinitialization of all logical channels is
uccepta ble.
e) if the centre is a PVC termination centre, notify the
CIDIN packet level that all PVCs assigned to logical
channels carried on the data link are not usable.
8.6.6.2.8.3 Receiving RESZART REQUEST
8.6.6.2.8.3.1 A centre which receives a valid RESTART
REQUEST with a logical channel identifier equal to 0, and
whose logical channels are not in the restart state shall:
a) discard all packets waiting to be transferred or
acknowledged;
b) immediately transfer a RESTART CONFIRMATION;
c) cause each logical channel assigned to carry a PVC to
re-enter the flow control ready state:
d) cause each logical channel not assigned to carry a
PVC to re-enter the unassigned state;
e) for each PVC assigned to a logical channel carried on
the data link:
1) if the centre is a PVC transit centre, and the
corresponding logical channel is in the flow
control ready state, execute the procedure for reset
on the corresponding logical channel with the
resetting cause field indicating "network
operational" and the diagnostic code equalling the
diagnostic code of the RESTART REQUEST;
2) if the centre is a PVC termination centre, notify
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