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36 Common usage GICB capability report
a) Transponders with downlink ELM cupuhility. The time
lhat the final bit of a 128-byte data packet is presented
to the DCE for downlink transfer to the time that the
final bil of the first encapsulating frame is available for
delivery to the transponder.
37-40 Reserved for ACAS b) Transponders with Comm-B capability. The time that the
final bil of a user data field of 24 bytes is presented to
41-56 Bit array indicating the support status of DTE the DCE for downlink transfer to the rime that the final
sub-address 0 to 15 bit of the lasl of the Four Comm-B segments that forms
Bit value 0 = DTE not supported the frame encapsulating the user data is available for
Bil value I = DTE supported delivery to the transponder.
Part I Annex 10 - Aeronau,#caE Teleco~nrnunicath~ns
c) Tra,izspondersv ~itlir .iplink ELM capabili~T. he lime that
the final bit of the last segmcnt of an ELM of 14
Comm-C segments that contains a user data field of
128 bytes is received by the ADLP to the time that the
final bit of the corresponding packet is available for
delivery to the DTE.
d) Transponders with Comm-A capability. The time that the
hnal bit of the last segment of four linked Comm-A
segments that contains a user data field of 25 bytes is
received by the ADLP to the time that the final bit of the
corresponding packet is available for delivery to the
DTE.
5.2.11 -2.2 GDLP TIMING
Recommendation.- The total tinae delay across the
GDLT: exclusive of transnzission delay, should not be greater
than 0.125 seconds.
5.2.11.3 Interface rate. The physical interface between
thc ADLP and the transponder shall have a minimum bit rate
of 100 kilobits per second.
5.3 DCE AND XDCE STATE TABLES
5.3.1 State table requirements. The DCE and XDCE shall
function as specified in state Tables 5-3 to 5-22. State Tables
5-15 through 5-22 shall be applied to:
a) ADLP state transitions when the XDCE or XDLP terms
in parenthesis are omitted; and
b) GDLP state transitions when the lerrns in parenthesis
are used and the XDCE or XDLP preceding them are
ornilled.
5.3.2 Diagnostic and cause codes. The table enlrics for
certain conditions indicate a diagnostic code that shall be
included in the packet generated when entering the state
indicated. The term, "D = ," shall define the diagnostic code.
When "A = DIAG," the action taken shall bc to generate an
IS0 8208 DIAGNOSTIC packet and transfer it to the DTE; the
diagnostic code indicated shall define the entry in the
diagnostic field of the packci. The cause field shall be set as
specified in 5.2.6.3.3. The reset cause licld shall be set as
specified in IS0 8208.
Note I.- The tables provided below specifi state requirements
in the following order:
5-15 DTE effect on 13CE rcset stares
5-7 DTE effect on DCE intesr~~Iprlm sfer sralcs
5-8 DTE effect on DCE flow control transfer states
5-9 XDCE effect on DCE restart states
5-10 XDCE effect on DCE call setup and clearing
states
5-1 1 XDCE effect on DCE reset states
5-12 XDCE effect on DCE interrupt transfer states
5-15 GDLP (ADLP) effect on ADCE (GDCE) packet
layer ready states
5-16 GDLP (ADLP) effect on ADCE (GDCE) call
setup and cleating states
5-17 GDLP (ADLP) effect on ADCE (GDCE) reset
States
5- 1 S GDLP (ADLP) effect on ADCE (GDCE) interrupt
transfer states
5-19 GDLP (ADLP) effect on ADCE (GDCE) flow
control transfer states
5-20 DCE effect on ADCE (GDCE) call setup and
clearing states
5-21 DCE effect on ADCE (GDCE) reset stales
5-22 DCE effect on ADCE (GDCE) interrupt transfcr
states
Note 2.- All tables speczh both ADLP and GDLP actions.
Note 3.- Within the Mode S subizetwork, states p6 and d2
are transient states.
Note 4.- References to "notes" in the state tables refer to
table-spocific notes that follow each state table.
Note 5.- All diagnostic uird cause codes are interpreted as
deciinal numbers.
Note 6.- An SVC between an ADCE and a GDCE may be
identlfied by a temporary and/or penizaiae~zt charinel nurnbel;
as defined in 5.2.5.1.2.
5-3 DCE spccial cases
5.4 MODE S PACKET FORMATS
5-4 DTE effect on DCE restar1 states
5-5 DTE effect on DCE call setup and clearing states
5.4.1 Formats. Thc Mode S packet formats shall he as
spccilicd in Figures 5-3 lo 5-22.
2811 1/02
No. 77
Annex 10 - Aeronautical Telecommunicatio~zs Volume I11
5.4.2 SignEficnnce of control fields. The structure of the
format control fields used in Mode S packets shall be as
specified in Figure 5-23. The significance of all control fields
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