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b) cause the logical channel to enter the reset state;
8.6.6.2.6.12 Punsferring data puckers c) transfer a RESET REQUEST;
8.6.6.2.6.12.1 Thc first data packet transferred in each
direction after a logical channel re-enters the flow control d) start a 180-second timer T22; and
ready state shall have P(S) equal to 0, and each subsequent
data packet shall have a P(S) equal to the P(S) of the e) if the centre is a PVC termination centre for the PVC
preceding data packet plus one. assigned to the logical channel, notify the CIDLN
packet level that the PVC assigned to the logical
8.6.6.2.6.12.2 When transferring a data packet, the
channel is not usable.
procedure for updating the reccive lower window edge shall be
executed and the P(R) shall then be set equal to the value of
the receive lower window edge. 8 -6.6.2.7.4 Receiving RESET REQUEST
8.6.6.2.6.12.3 A data packet shall not be transferred 8.6.6.2.7.4.1 A centre which receives a valid RESET
when the P(S) is equal to or beyond the transfer lower window MQUEST when h e logical channel is in the flow control
edge plus W. ready state shall:
8.6.6.2.6.13 Procedures for updating the receive
lower window edge (see 8.6.6.2.6.7-4 a)
and 8.6.6.2.6.7.5 a))
8.6.6.2.6.13.1 A PVC transit centre shdl set the receive
lower window edge equal to the next expected P(S).
8.6.6.2.6.13.2 A PVC termination centre shall set the
receive lower window edge to equal the next expected P(S).
8.6.6.2.6.13.3 A centre which has changed the value of
the receive lower window edge, and which cannot send a data
packet, and which remains temporarily unable to accept further
data packets, shall transfer a RECEIVE NOT READY.
7/11/96
No. 71
a) discard all packets waiting to be trxnsferred or
acknowledged on the logical channel;
b) immediately transfer a RESET CONFIRMATION;
C) cause the logical channel to re-enter the flow control
ready state;
d) 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 correspondir~g
logical channel with an identical diagnostic code and
with a resetting cause field as follows:
Part I Annex 10 - Aeronautical Telecommunications
Resetti~~cga use Jield Resetting cause field
received transj-erred
- .
centre-originated reset centre-originated reset
out of order out of order
remote procedure error remote procedure error
local procedure emr local procedure esror
network congestion network congestion
remote centre operational remote centre operational
network operational network operational
e) if the centre is a PVC termination centre for the PVC
assigned to the logical channel, and the resetting cause
field is "out of order", notify the CIDIN packet level
that thc PVC is not usable; and
f) if the centre is a PVC termination centre for the PVC
assigned to the logical channel and the resetting cause
field is "network operational", notify the CIDIN packet
level that the PVC is usable.
8.6.6.2.7.4.2 A centre which receives a valid RESET
REQUEST when the logical channel is in the reset state shall:
a) cancel T22;
b) cause the logical channel to enter the flow control
rcady state;
c) if the centre is a PVC termination centre for the PVC
assigned to the logical channel, notify the CIDW
packet level that the PVC assigned to the logical
channel is usable.
8.6.6.2.7.4.3 A centre which receives a valid RESET
REQUEST when the logical channel is in the restart or
unassigned state shall discard the RESET REQUEST.
8.6.6.2.7.4.4 A centre which receives a non-valid
RESET REQUEST shall:
a) if the logical channel is in the flow control ready ox
reset state:
1) execute the procedure for reset with the rcsctting
cause field indicating "local procedure error" and
the appropriate diagnostic code;
2) 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 lor reset on the
corresponding logical channel with the resetting
cause field indicating "remote procedure error" and
the appropriate diagnostic code;
b) if the logical channel is in the restart or unassigned
state, discard the RESET REQUEST.
8.6.6.2.7.5 Receiving RESET CONFIRMATION
8.6.6.2.7.5.1 A centre which receives a valid RESET
CONFIRMATION when the logical channel is in the flow
control ready state shall:
a) execute the procedure for reset with the resetting cause
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