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to 1. shall be as follows:
ODLO or 8
7/11/96
No. 71
Annex 10 - Aeronautical Telecommunications Volume I11
Fields shown in the packet format and not specified in the Fields shown in the packet fbrmat and not specified in the
following paragraphs shall be set as specified in 5.2.5.2.1 and following paragraphs shall be set as specified in 5.2.5.2.1. This
5.2.5.2.5. This packet shall be processed as specified in packet shall be processed as specified in Table 5-14.
5.2.6.3.
5.2.5.3.6.2 Dara packet type {DP). This field shall be set
5.2.5.3.4.2 Data packet gpe (DP). This field shall be set to 0.
to 0.
5.2.5.3.4.3 MSP packet ope (MP). This field shall be set 5.2.5.3.6.3 MSP packet rypc (MP). This field shall be set
to 1. to 1.
5.2.5.3.4.4 Supewiso~yp acket (SP). This field shall be 5.2.5.3.6.4 Supewisory packer (SP). This field shall be
sat to 1. set to 2.
5.2.5.3.4.5 Supervisov type (ST). This field shall be set 5.2.5.3.6.5 Supewisoiy t;t'pe (ST). This field shall be set
to 3. to 3.
5.2.5.3.5 MODE S CLEAR CONFIRMATION BY GDLP 5.2.5.3.7 MODE S REJECT
5.2.5.3.5.1 Packet format. The format for this packet 5.2.5.3.7.1 Packet format. The format for this packet
shall be as follows: shall be as follows:
Fields shown in the packet format and not specified in the Fields shown in the packet format and not specified in the
following paragraphs shall be set as specified in 5.2.5-2.1 and following paragraphs shall be set as specified in 5.2.5.2.1. This
5.2.5.2.6. This packet shall be processed as specified in packet shall be processed as specified in 5.2.6.8.
5.2.6.3.
5.2.5.3.5.2 Data packet ppe (DP). This field shall be set 5.253.7.2 Data packet type (LIP). This field shall be set
to 0. to 0.
5.2.5.3.5.3 MSPpncket type (MP). This field shall be set 5.2.5.3.7.3 MSPpacket type (MP). This field shall be set
to 1. to 1.
5.2S.3.5.4 Superviso~p acket (SP). This field shall be 5.2.5.3.7.4 Supewisoty packet {SP). This field shall be
set to 1. set to 3.
5.2.5.3.5.5 Supenlisov qpe (ST). This liald shall be set 5.2.5.3.7.5 Supen*isop type (ST). This field shall be set
to 3. to 3.
5.2.5.3.6 MODE S RESET CONFIRMATION
5.2.5.3.7.6 Supervisory subset (SS). Ths field shall be
set to 1.
5.2.5.3.6.1 Packet format. The format for this packet 5.2.5.3.7.7 Packet receive sequence number (PR). This
shall be as follows: field shall be set as specified in 5.2.6.4.4.
7/11/96
No. 71
Part I Annex 10 - Aeronautical Telecommunications
5.2.6 XDCE operation a CLEAR REQUEST packet. Procedures for handling these
cases shall be as specified in Table 5-16 and Table 5-20.
Note.- The ADCE process within the ADLP acts as a
peer process to the GDCE process in the GDLP.
5.2.6.1 State transitions. The XDCE shall operate as a
state machine. Upon entering a state, the XDCE shall perform
the actions specified , in Table 5-14. State transition and
additional action($) shall be as specified in Table 5-15 through
Table 5-22.
Note 1.- The next state transition (if any) hat occurs
when the XDCE receives a packet from the peer XDCE is
specijed by Table 5-15 through Tuble 5-19. The same
transitions are dejned irz Tuble 5-20 through Tuble 5-22 when
the XDCE receives a packet from the DCE (via the reformatting
process).
Note 2.- The XDCE state hierarchy is the same us for the
DCE as presented in Figure 5-2, except that states r2, r3 and
p5 are omitted.
5.2.6.2 DISPOSITION OF PACKETS
5.2.6.2.1 Upon receipt of a packet from the peer XDCE,
the packet shall be forwarded or not forwarded to the DCE
(via the reformatting process) according to the parenthetical
instructions contained in Tables 5-15 to 5-19. If no parenthetical
instruction is listed or if the parenthetical instruction
indicates "do not forward" the packet shall be discarded.
5.2.6.2.2 Upon receipt of a packet from the DCE (via
the reformatting process), the packet shall be forwarded or not
forwarded to the peer XDCE according to the parenthetical
instructions contained in Tables 5-20 to 5-22. If no parenthetical
instruction is listed or if the parenthetical instruction
indicates "do not forward the packet shall be discarded.
5.2.6.3 SVC CALL SETUP AND
CLEAR PROCEDURE
5.2.6.3.1 Setup procedure$. Upon receipt of a CALL
REQUEST from the DCE or peer XDCE, the XDLP shall
determine if sufficient resources exist to operate the SVC. This
shall include: sufficient buffer space (refer to 5.2.5.1.1 for
buffer requirements) and an available pl state SVC. Upon
acceptance of the CALL REQUEST from the DCE (via the
reformatting process), the Mode S CALL REQUEST packet
shall be forwarded to frame processing. Upon acceptance of a
 
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