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interface (and vice versa) shall not cxcccd for undetected
errors and 10.' for detected errors.
Note.- The maximum error rate includes all errors
resulting from data transfers across the interfaces and from
XDLP internal operation.
5.2.1 1.2.1 ADLP timing. ADLP operations shall not take
longer than 0.25 seconds for regular traffic and 0.1 25 seconds
for interrupt traffic. This interval shall be defined as follows:
a) Panspanders wirh downlink ELW capabiliry. The time
that the final bit of a 128-byte data packet is presented
5/lY 98
No. 73
Part I Annex 10 - Aeronautical Telecommunications
to the DCE for downlink transfer to the time that the
final bit of the first encapsulating frame is available
for delivery to the transponder.
b) Transponders with Comm-B capability. The time that
the final bit o f a user data field of 24 bytes is
presented to the DCE for downlink transfer to the time
that the final bit of the last of the four Comm-B
segments that forms the frame encapsulating the user
data is available for delivery to the transponder.
c) . Transponders with uplink ELM capability. The time
that the final bit of the last segment 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 Camm-A capability. The time that
the final 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 time delay across the
GDLP, exclusive of transmission delay, shauld not be greater
than 0.125 seconds.
Recommendation.- All of the requirements for data
integriry and timing shauld take into consideration the effect
of other active aircraft data links performing transfer
operations in both directions at their nominal rates.
5.2.11.4 Interface rate. The physical interface between
the 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 terms in parenthesis
arc used and the XDCE or XDLP preceding them are
omi ttcd.
5.3.2 Diagnostic und cause codes. The table entries for
certain conditions indicate a diagnostic code that shall be
included in the packer generated when entering the state
indicated. The term, "D = ," shall define the diagnostic code.
When "A = DIAG," the action taken shall be 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 packet. The cause field shall be set as
specified in 5.2.6.3.3. The reset cause field shall be set as
specified in IS0 8208.
Note 1.- The tables provided below specib state requirements
in the fallowing order:
5-3 DCE special cases
5-4 DTE effect on DCE restart states
5-5 DTE effect on DCE call setup and clearing states
5-6 DTE effect on DCE reset states
5-7 DTE effect on DCE intermpt transfer states
5-8 DTE effect on DCE flow control transfer states
5-9 XDCE effect on DCE restart states
5-1 0 XDCE effect on DCE call setup and clearing states
5-11 XDCE effect on DCE reset states
5-12 XDCE effect on DCE intermpt transfer states
5-15 GDLP (ADLP) effect on ADCE (GDCE) packet
layer ready states
5-16 GDEP (ADLP) effect on ADCE (GDCE) call
setup and clearing states
5-17 GDLP (ADLP) effect on ADCE (GDCE) reset
states
5- 18 GDLP (ADLP) effect on ADCE (GDCE) intermpt
transfer states
5-19 GDLP (ADLP) effect on A X E (GDCE) flow
control transfer states
5-20 DCE effect on AWE (GDCE) call setup and
clearing states
5-21 DCE effect on ADCE (GDCE) reset states
5-22 DCE effect on ADCE (GDCE) intermpt transfer
states
Note 2.-All tables sp~cifyb oth ADW and GDLP actions.
511 1/98
No. 73
Annex 10 - Aeronautical Telecommunications Volume ZZZ
Note 3.- Wirhin the Mode S subn'etwork, states p6 and d2
are transient states.
Fast select present.
Initialization bit
Note 4.- References to "rtotes" in the state tables refer to
　
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