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5.2.5.3.3 MODE S ROUTE
Fields shown in the packet format and not specified in the
following paragraphs shall be set as specified in 5.2.5.2.1. The
packet shall be processed as specified in 5.2.6.5.
DP:l
5.2S.3.1.2 Data packet type (DP). This field shall be set
to 0.
MPI SP:2
5.2.5.3.1.3 MSPpacket gpe (MP). This field shall be set
to 1.
5.2.5.3.1.4 Supervisoly packet (SP). This field shall be
set to 2.
ST:2
5.2.5.3.1.5 Supervisoiy ype (ST). This field shall be set
to 0.
FILL2:O or 2
5.2.5.3.1.6 Packet receive sequence number (PR). This
field shall be set as specified in 5.2.6.4.4.
5.2.5.3.3.1 Packet format. The format for the packet
shall be as follows:
Fields shown in the packet format and not specified in the
following paragraphs shall be set as specified in 5.2.5.2.1. The
packet shall only be generated by the GDLP. It shall be processed
by the A D ~ Pas specified in 5.2.8.1.2 and shall have
a maimurn size as specified in 5.2.6.4.2.1.
5.2.5.3.3.2 Data packet type (DP). This field shall be set
to 0.
5.2.5.3.3.3 MSPpacket type (MP). This field shall be set
to 1.
5.2.5.3.3.4 Supervisory packet (SP). This field shall be
set to 3.
5.2.5.3.3.5 Supervisory type (ST). This field shall be set
to 0.
5.2.5.3.2 MODE S RECEIVE NOT READY
5.2.5.3.2.1 Packet format. The Mode S RECEIVE NOT
READY packet arriving from an XDLP is not related to the
control of the DTEJDCE interface and shall not cause the
generation of an IS0 8208 packet. The format of the packet
shall be as follows:
Fields shown in the packet format and not specified in the
following paragraphs shall be set as specified in 5.2.5.2.1. The
packet shall be processed as specified in 5.2.6.6.
5.2.5.3.2.2 Data packet type (DP). This field shall be set
to 0.
5.2.5.3.2.3 MSPpacket type (MP). This field shall be set
to 1.
5.2.5.3.2.4 Supervisory packet (SP). This field shall be
set to 2.
5.2.5.3.3.6 Option Jag (OF). This field shall indicate the
presence of the optional data length (ODL) and optional data
(OD) fields. OF shall be set to 1 if ODL and OD are present.
Otherwise it shall be set to 0.
5.2.5.3.3.7 Initialization hit (IN). This field shall indicate
the requirement for subnetwork initialization. It shall be set by
the GDLP as specified in 5.2.8.1.2 d).
Note.- Initialization causes the clearing of anv open SVCs
associuted with the DTE addresses contained in the ROUTE
packet. This is needed to assure that all channels are closed
at acquisition and for initialization follow~ng recovery after a
GDLP failure.
5.2.5.3.3.8 Route table length (RTL). This field shall
indicate the size of the route table, expressed in bytes.
5.2.5.3.3.9 Route table (RT)
5.2.5.3.3.9.1 Contents. This table shall consist of a
variable number of entries each containing infonnation specifying
the addition or deletion of entries in the LI code-DTE
cross-reference table (5.2.8.1.1).
5.2.5.3.2.5 Supervisory type (ST). This field shall be set 5.2.5.3.3.9.2 Entries. Each entry in the route table shall
to 1. consist of the I1 code, a list of up to 8 ground DTE addresses,
and a flag indicating whether the resulting 11 code-DTE pairs
5.2.5.3.2.6 Packet receive sequence number (PR). This shall be added or deleted from the I1 code-DTE crossfield
shall be set as specified in 5.2.6.4.4. reference table. A route table entry shalr be coded as follows:
Annex 10 - Aeronautical Telecommunications Volume I21
5.2.5.3.3.9.3 Interrogator identiJer (II). This field shall
contain the 4-bit IT code.
5.2.5.3.3.9.4 Addfdelete fig (AD). This field shall
indicate whether the 11 code-DTE pairs shall be added
(AD = 1) or deleted (AD = 0) from the 11 code-DTE crossreference
table.
5.2.5.3.3.9.5 Number of DTE addresses (ND). This field
shall be expressed in binary in the range from 0 to 7 and shall
indicate ~hcnu mber of DTE addresses present in DAL minus
1 (in order to allow from 1 to 8 DTE addresses).
5.2.5.3.3.9.6 DTE address list (DAL). This list shall
consist of up to 8 DTE addresses, expressed in 8-bit binary
representation.
5.2.5.3.3.10 Optional data length (ODL). This field shall
contain the length in bytes of the following OD field.
5.2.5.3.3.11 Optiaraal data (OD). This variable length
field shall contain optional data.
5.2.5.3.4 MODE S CLEAR CONFIRMATION BY ADLP
5.2.5.3.4.1 Packet format. The format for this packet
shall be as follows:
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
5.2.5.2.5. This packet shall be processed as specified in
　
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