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Mode S DATA packet(s) as determined by M-bit processing
(5.2.5.1.4. I), as follows:
5.2.5.2.7.1.2 Data packet ppe (DP). This field shall be set
to 1.
5.2.5.2.7.1.3 Mfield (M). A value of 1 shall indicate that
the packet is part of an M-bit sequence with more packets in
the sequence to follow. A value of 0 shall indicate that the
sequence ends with this packet. The appropriate value shall be
placed in the M-bit field of the Mode S packet.
Note.- See 5.2.5.1.4 and I S 0 8208 for a complete
explanation.
5.2.5.2.7.1.4 Sequence number (SN). The scqucnce
number field shall be set as specified in 5.2.5.2.1.1.7.
5.2.5.2.7.1.5 Packet sertd sequence number (PS). The
packet send sequence number field shall be set as specified in
5.2.6.4.4.
5.2.5.2.7.1.6 Packet receive sequence niinzber (PR). The
packet receive sequence number field shall be set as specified
in 5.2.6.4.4.
Part 1 Annex 10 - Aeronautical Telecommunications
5.2.5.2.7.1.7 Channel number (CH). The channel nuinber
field shall contain the Mode S channel numbcr that corresponds
to the incoming IS0 8208 DATA packct channel
number.
5.2.5.2.7.1.8 User data length (LV). This field shall
indicate the number of full bytes used in the last SLM or ELM
segment as defined in 5.2.2.3.1.
5.2.5.2,7.1.9 Fill (FILL]). This field shall be sct as
specified in 5.2.5.2.1.1.11.
5.2.5.2.7.1.10 User data (UD). The user data shall be
transferred from the IS0 8208 packet to the Mode S packet
utilizing the M-bit packct assembly processing as required.
5.2.5.2.7.2 Trarzslation into IS@ 8206 packets. Reception
by the XDLP reformatting process of Mode S DATA packet(s)
from the local XDCE shall result in the generation of
corrcsponding IS0 8208 DATA packet(s) to the local DCE.
The translalion froin Mode S packet(s) to the IS0 8208
packet(s) shall be thc inverse of the processing defined in
5.2.5.2.7.1.
5.2.5.2.8.1.7 iJser data (UD). The user data shall be
transferred from the IS0 8208 packel to the Mode S packet
using the S-bit packet reassembly processing as required. The
maximum size of the user data field for an INTERRUPT
packet shall be 32 bytes.
5.2.5.2.8.2 Translation into IS0 8208 packets. Receplion
by the XDLP reformatting process of Mode S INTERRUPT
packet(s) from the local XDCE shall result in the generation
of a corresponding IS0 8208 INERRUPT packet to the local
DCE. The translation from the Modc S packet(s) to the IS0
8208 packet shall be the inverse of the processing defined in
5.2.5.2.8.1.
5.2.5.2.9 INTERRUPT CONFIRMATION
5.2.5.2.9.1 Translatiorz into Mode S packets
5.2.5.2.9.1.1 Translated packet fornzut. Reception by thc
XDLP reformatting proccss or an IS0 8208 INTERRUPT
CONFIRMATION packet from thc local DCE shall result in
the generation of a corresponding Mode S INTERRUPT
CONF'IRMATION packet as follows:
5.2.5.2.8 INTERRUPT
5.2.5.2.8.1 Translation into Mode S packets
packet from the l o c i DCE shall result in the generation of
Fields shown in the packct format and not specified in the
corresponding Mode S INTERRUPT packet(s) (as determined
following paragraphs shall bc set as specified in 5.2.5.2.1.
by S-bil processing (5.2.5.1.4.2)) as follows:
5.2.5.2.8.1.1 Tran.slated packet formut. Reception by the 1 FILL2:O 1 2 1 SN:6
Fields shown in the packel format and not specified in the
following paragraphs shall be set as specified in 5.2.5.2.1.
XDLP 1-cfomatting process of an IS0 8208 INTERRUPT
CH:4
DP:l
5.2.5.2.8.1.2 Data packet type (DP). This field shall be set
to 0.
FILL:4
5.2.5.2.8.1.3 MSP packet type (MP). This field shall b~
set to 1.
5.2.5.2.8.1.4 Supervi.co171p acket (SP). This field shall be
set to 3.
MP:1
5.7.5.2.8.1.5 S~~pervisortyyp e (ST). This licld shall be set
to 1.
SP:2 ST:2
5.2.5.2.8.1.6 User dutrr lerlgth (LV). This field shall be sct
as specified in 5.2.2.3.1.
5.2.5.2.9.1.3 MSP packet type (MP). This field shall be
set to 1.
FILL20 or 2
5.2.5.2.9.1.4 Supervisory packet (SP). This field shall be
sel to 3.
S:1
5.2.5.2.9.1.5 Supervisory type (ST). This field shall be set
to 3.
5.2.5.2.9.1.2 Data packet type (DP). This held shall be set
to 0.
5.2.5.2.9.1.6 Supervisory subset (SS). This lield shall be
set to 0.
5.2.5.2.9.2 Trarzslution into IS0 8208 packets. Reception
by the XDLP reformatting process or a Mode S INTERRUPT
CONFIRMATION packet from the local XDCE shall resulr in
the generalion of n corresponding IS0 8208 INTERRUPT
CONFlRMATION packet to the local DCE. The translation
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