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Notes: CPS/210/SYS/0001
Names: »0193A «
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…00……00……00……00…A…02……00……86…1 …02… …02… …02…
…02…CPS/210/SYS/0001
…02…800919…02…
CAMPS SYSTEM REQUIREMENTS
…02……02…CAMPS
T̲A̲B̲L̲E̲ ̲O̲F̲ ̲C̲O̲N̲T̲E̲N̲T̲S̲
S̲e̲c̲t̲i̲o̲n̲ ̲3̲.̲2̲.̲2̲
3.2.2 Incoming Message......................
3.2.2.1 Message Reception Procedures......
3.2.2.2 ACP127 Analysis...................
3.2.2.2.1 Format Line Detection ........
3.2.2.2.2 Selection of Parameter........
3.2.2.2.3 Determination of Message Type
3.2.2.3 Message Distribution .............
3.2.2.3.1 Automatic Distribution .......
2.2.2.3.2 Distribution of Messages with
Encrypted Text and Data
Messages......................
2.2.2.3.3 Distribution of Service
Messages .....................
3.2.2.4 Procedures Related to Receipt of
FLASH messages....................
3.2.2. I̲n̲c̲o̲m̲i̲n̲g̲ ̲M̲e̲s̲s̲a̲g̲e̲s̲
a) CAMPS shall support the following major functions
for incoming message handling.
1) Message Reception Procedures (Ref. section
3.2.2.1)
2) ACP 127 Analysis (Ref. section 3.2.2.2)
3) Message Distribution (Ref. section 3.2.2.3)
b) Other major functions shall act as support functions
to the message handling functions. These functions
are
1) Storage and Retrieval Functions.
2) Logging and Reporting Functions.
3) Terminal Handling Functions.
c) Figure 3.2.2-1 presents the functional relationships
for incoming message handling functions.
d) Message types applicable to incoming message handling
are those specified in section 3.2.1.1.
3.2.2.1. M̲e̲s̲s̲a̲g̲e̲ ̲R̲e̲c̲e̲p̲t̲i̲o̲n̲ ̲P̲r̲o̲c̲e̲d̲u̲r̲e̲s̲
a) Each message received shall be uniquely identified
by a channel designator and a channel serial number.
This information shall be contained in "Format
Line 1" of ACP127 formatted messages.
b) Upon reception of a message CAMPS shall check the
channel serial number in "Format Line 1" to determine
whether it is in sequence.
1) If the number is not equal to the number of
the latest message incremented by one a warning
shall be printed out at the supervisors position
both indicating the expected number and the
received incorrect number.
2) If the number is less or equal the number of
the latest message, the message shall not be
stored on reception, a log entry shall be made,
however, (refer to section 3.2.5.6.11b)
3) If the number is larger than the number of
the latest message incremented by one the message
shall be stored and the "expected channel serial
number" shall be reset to the one received
plus one.
b) If a message is received without a channel serial
number, it shall be handled as a valid message,
and the "expected channel serial number" shall
be allocated to the message by the system.
The expected number for the next message shall
be equal to the allocated number plus one.
The occurence shall be signalled to the supervisor
as for incorrect serial number.
figur. 3.2.2-1
3.2.2.2 A̲C̲P̲1̲2̲7̲ ̲A̲n̲a̲l̲y̲s̲i̲s̲
a) The format tolerances of CPS/ICD/0003 shall apply
to messages in ACP 127 format.
b) Certain departures from the ACP 127 format are
allowed.
c) Unacceptable departures such as
- no start of transmission function (VZCZC)
shall result in no acceptance of input.
d) The following set of conditions shall lead to immediate
insertion of termination sequence and queuing for
message service
1) Consecutive start of message (SOM) sequences.
2) Oversized messages.
3) Halted messages.
4) Consecutive identical characters
e) In the following cases the message shall be received
to the end and then queued to message service
1) Lines are too long
2) Non-standard end-of-transmission (preemption,
cancellation or other) sequence.
f) Detailed specification for handling of the above
cases are contained in CPS/ICD/0003.
g) Each message consist of a number of format lines.
Each format line present consists of one or more
physical lines (a physical line is characterised
by having an end-of-line character sequence).
h) The requirements specified in the subsequent sections
are related to the following analysis of ACP 127
formatted messages.
1) Detection of format line
2) Selection of parameters from format/physical
lines
3) Determination of message type.
3.2.2.2.1 F̲o̲r̲m̲a̲t̲ ̲L̲i̲n̲e̲ ̲D̲e̲t̲e̲c̲t̲i̲o̲n̲
Detection of format lines shall be based on the character
sequences specified below:
FORMAT LINE DETECTION CRITERIA
1 "VZCZC" (SOTF)
2 Dual precedence prosign
3 "DE"
4 "ZNY" or "ZNR"
5 Precedence, datetime group
6 "FM"
7 "TO"
8 "INFO"
9 "XMT"
10 "GR"
11 "BT"
12a CLASSIFICATION/SPECAT
12b "SIC"
12c "EXER"er "E(Sp)X(Sp)E(Sp)R"
12d "FOR" or "PASS"
13 "BT"
14 "C"
15 "H"
16 EOTF
Figure 3.2.2.2.1-1
Figure 3.2.2.2.1-1
Figure 3.2.2.2.1-1
Figure 3.2.2.2.1-1
3.2.2.2.2 S̲e̲l̲e̲c̲t̲i̲o̲n̲ ̲o̲f̲ ̲P̲a̲r̲a̲m̲e̲t̲e̲r̲s̲
Each format line contains a number of parameters which
are mandatory or optional.
Figur 3.2.2.2.2-1 presents a overview of the parameters
applicable for each format line and physical line.
3.2.2.2.3 D̲e̲t̲e̲r̲m̲i̲n̲a̲t̲i̲o̲n̲ ̲o̲f̲ ̲M̲e̲s̲s̲a̲g̲e̲ ̲T̲y̲p̲e̲
Processing subsequent to ACP127 analysis depends on
message type.
The message type shall be determined from the format
lines existing in a message. Figur 3.2.2.2.2-1 presents
a specification of the formats lines contained in the
different message types.
3.2.2.3 M̲e̲s̲s̲a̲g̲e̲ ̲D̲i̲s̲t̲r̲i̲b̲u̲t̲i̲o̲n̲
a) Processing and distribution subsequent to ACP127
analysis depends on the message type.
b) Overleaf is presented an overview of how message
types are processed subsequent to message reception
and ACP127 analysis.(Refer to figure 3.2.2.3-1).
c) Fig. 3.2.2.2-1 provides an overview of incoming
message distribution. Details are given in CPS/ICD/0003.
d) In case routing indicators are detected in format
line 2 which are not relevant to CAMPS the message
shall be queued for message servicing for decision
an alternative routing (which may be based on T
instruction in format line 4).
e) In case of relevant routing indicators in formt
line 2 the PLA's associated to these routing indicators
(plus PLA's in AIG's and any single addressee PLA)
shall be compared to PLA's of the associated Head
Quarters.
f) Further, distribution is automatic apart from the
following cases.
1) Message is queued for message service for garble
correction having been corrected it is queued
for further automatic distribution.
2) Message is queued for message distribtuion
control for the following reasons:
- garbled SIC's
- missing SIC's
- special category SIC's
- special handling designators in format
line 4
- supervisor directed (refer to section 3.2.4.1.1.3).
3) Having been processed by the MDCO the message
is queued for further automatic distribution.
3.2.2.3.1 A̲u̲t̲o̲m̲a̲t̲i̲c̲ ̲D̲i̲s̲t̲r̲i̲b̲u̲t̲i̲o̲n̲
a) After successful analysis of the incoming message
and possible corrections (message servicing or
message distribution control) the message shall
be distributed locally within the addressed headquarters
as follows (fig. 3.2.2.2-1).
1) to the terminals associated with SCD's from
the SDL's pointed to by the exercise and/or
subject SIC's of the message.
2) to the terminals associated with the SCD's
specified by the MDCO.
3) based on originator designation (format line
6 of ACP 127) which shall be used similar to
SCC's in certain headquarters
4) based on PRECEDENCE, CLASSIFICATION, and SPECIAL
HANDLING according to the rules of section
3.2.3.
b) Each copy shall be presented to the recipient in
format E1 with the following information.
1) Special Handling
2) Action Precedence
3) All Action Staff Cells for the Headquarter
4) All Info Staff Cells for the Headquarter
5) Format Lines 5 to 13 (as applicable) from the
message concerned.
c) Messages that during the automatic distribution
are destined to a terminal position to which the
message, for the time being, can not be delivered
shall be sent to the Message Distribution Control
position. The message is considered not deliverable
when
1) the terminal position is unmanned
2) the terminal position is unattended and the
classification of the message is higher than
NATO UNCLASSIFIED
3) the terminal position is ATTENDED but the highest
classification specified for the terminal/operator
is lower than the classification of the message
4) the terminal position is ATTENDED but the message
is of a special handling category not specified
for the terminal/operator.
Refer to section 3.2.3.2
3.2.2.3.2 D̲i̲s̲t̲r̲i̲b̲u̲t̲i̲o̲n̲ ̲o̲f̲ ̲M̲e̲s̲s̲a̲g̲e̲s̲ ̲w̲i̲t̲h̲ ̲E̲n̲c̲r̲y̲p̲t̲e̲d̲ ̲T̲e̲x̲t̲ ̲a̲n̲d̲
̲D̲a̲t̲a̲ ̲M̲e̲s̲s̲a̲g̲e̲s̲
Messages with encrypted text shall be queued for a
position as determined by the supervisor.
Dato messages shall (on detection of special handling
designator D) be sent to the MDCO, unless detection
of format lines 7 (PLA) and 12b (SIC) provide for automatic
distribution.
3.2.2.3.3 D̲i̲s̲t̲r̲i̲b̲u̲t̲i̲o̲n̲ ̲o̲f̲ ̲S̲e̲r̲v̲i̲c̲e̲ ̲M̲e̲s̲s̲a̲g̲e̲s̲
All service messages (also abbreviated) shall always
be directed to the supervisor except those related
to channel control as specified in section 3.3.1 and
3.3.2.
3.2.2.4 P̲r̲o̲c̲e̲d̲u̲r̲e̲s̲ ̲R̲e̲l̲a̲t̲e̲d̲ ̲t̲o̲ ̲R̲e̲c̲e̲i̲p̲t̲ ̲o̲f̲ ̲F̲L̲A̲S̲H̲ ̲M̲e̲s̲s̲a̲g̲e̲s̲
If messages received by a CAMPS has the precedence
FLASH and format line 4 of the message does not contain
an inhibit receipt flag (ZGC) a service message as
specified in section 3.2.1.6.4 shall be transmitted
to the originating station. Format and content of FLASH
receipt message is as specified in 3.2.1.6.4.
