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Notes: CPS/SDS/001 ISSUE 1
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:…07…9…0d…9 …86…1
…02…
…02…
…02…
…02…CPS/SDS/001
…02…SRA/810430…02……02…
CAMPS
SYSTEM
DESIGN
SPECIFICATION
…02…ISSUE
1…02…CAMPS
T̲A̲B̲L̲E̲ ̲O̲F̲ ̲C̲O̲N̲T̲E̲N̲T̲S̲
5.3 DISTRIBUTION, MONITORING & TEST (DM&T)
DESIGN ...................................
201
5.3.1 General ..............................
201
5.3.2 Distribution & Monitoring Equipment/
Facilities ...........................
201
5.3.2.1 DEC - Category 1 .................
209
5.3.2.2 DEC - Category 2 .................
211
5.3.2.3 DEC - Category 3 .................
213
5.3.2.4 DEC - Category 4 .................
215
5.3.2.5 DEC - Category 5 .................
217
5.3.3 Test of Distribution Equipment .......
217
5.3.4 Appendix A ...........................
217
5.3 D̲I̲S̲T̲R̲I̲B̲U̲T̲I̲O̲N̲,̲ ̲M̲O̲N̲I̲T̲O̲R̲I̲N̲G̲ ̲&̲ ̲T̲E̲S̲T̲ ̲(̲D̲M̲&̲T̲)̲ ̲D̲E̲S̲I̲G̲N̲
5.3.1 G̲e̲n̲e̲r̲a̲l̲
The aim of this section is to explain the design of
the DM&T equipment/facilities as implemented in the
present CAMPS H/W configuration shown in fig. 5.3.1-1.
5.3.2 D̲i̲s̲t̲r̲i̲b̲u̲t̲i̲o̲n̲ ̲&̲ ̲M̲o̲n̲i̲t̲o̲r̲i̲n̲g̲ ̲E̲q̲u̲i̲p̲m̲e̲n̲t̲/̲F̲a̲c̲i̲l̲i̲t̲i̲e̲s̲
The present CAMPS system interfaces to terminals and
external circuits, both in a collocated and a remote
configuration.
The main difference between a collocated and a remote
configuration is that data exchange in the remote configuration
involves VF-Modem links carrying encrypted data (crypto/modem
link).
The types of terminals in collocated configurations
are:
- Visual Display Unit (VDU)
- Medium Speed Teleprinter (MSP)
- Low Speed Channel Device (i.e TTY) (LSC)
- Optical Character Reader (OCR)
- Paper Tape Puncher (PTP)
- Paper Tape Reader (PTR)
The remote terminal configuration is only applicable
to a subset of these namely:
- VDU
- MSP
Furthermore, the remote terminal concept involves a
statistical multiplexing/demultiplexing system minimizing
the number of crypto/modem links.
The types of external circuits in collocated configurations
are:
- NICS/TARE
- SCARS
- CCIS
The remote external circuits configuration is only
applicable to NICS TARE.
Terminals and external circuits, collocated or remote,
are connected to CAMPS via the Distribution Equipment.
The path for data exchange between CAMPS and one collocated/remote
terminal type or one collocated/remote external circuit
type will in the following be referenced to as a Data
Exchange Channel (DEC).
A DEC contains distribution equipment and a line terminating
unit.
Two types of line terminating units exist
- Line terminating unit of the LTU type (I/O BUS
I/F)
- Line terminating units of the LTUX type (TDX BUS
I/F)
Common to all DECs is the electrical interface specification
between a line terminating unit and its associated
distribution equipment. This I/F conforms to the CCITT
V24/V28 recommendations. To adapt this internal standard
interface to the various interface requirements of
the terminals and external circuits, collocated or
remote, three main types of distribution equipment
are involved:
- Optical link distribution
- Low level V24/V28 distribution
- Statistical mux/demux distribution
5 categories of DECs are implemented to satisfy interface
and security requirements when connecting terminals
and external circuits to CAMPS. These are as shown
in fig. 5.3.2-1.
The line termination modules are placed within CAMPS
in either a TDX CRATE ASSEMBLY shown in fig. 5.3.2-2
or a CHANNEL UNIT ASSEMBLY shown in fig. 5.3.2-3.
Some of the modules of the Distribution Equipment are
also placed in either a TDX crate assembly or a Channel
Unit assembly.
FIGURE 5.3.1-1…01…CAMPS H/W CONFIGURATION
FIGURE 5.3.2-1…01…DATA EXHANGE CHANNEL MATRIX
FIGURE 5.3.2-2
TDX Crate Assembly
FIGURE 5.3.2-3…01…CHANNEL UNIT ASSEMBLY
TABLE 5.3.2-4…01…Data Exchange Channel, Category Characteristics
In the following paragraphs each DEC category is described.
Furthermore, monitoring facilities for each category
will be indicated.
Where applicable the mechanical dimensions of the involved
modules will be referenced to as:
- Standard CR80S module, or
- Standard CR80D front crate module, or
- Standard CR80D rear crate module
For further explanation of the CR80S and CR80D mechanics
please refer to section 5.5.
5.3.2.1 D̲E̲C̲ ̲-̲ ̲C̲a̲t̲e̲g̲o̲r̲y̲ ̲1̲
Fig. 5.3.2.1-1 shows the cat. 1 DEC along with facilities
to monitor the DEC traffic. The OPTO Transceivers perform
the conversion from the V24/V28 circuitry signals to
serial opto signals and vice versa.
The V24 circuits transferred via the distribution equipment
and the baud rates are as shown in table 5.3.2-4. For
explanation of the V24 circuit numbers please refer
to Appendix A (subsection 5.3.4).
The DEC is formed by one LTUX channel and the associated
distribution equipment.
The LTUX is a standard CR80S module placed in a TDX
crate as shown in fig. 5.3.2-2. The LTUX is capable
of handling max. 4 DECs depending on transmission speed
and protocols. The V24/V28 MONITOR module shown is
not normally mounted. But when plugged into the TDX
crate for maintenance purposes it enables monitoring
of the LTUX V24/V28 signals via Cannon plugs on its
front panel. The V24/V28 MONITOR module is a standard
CR80S module providing monitoring access to all 4 V24/V28
channels of the LTUX.
The distribution equipment contains a TDX crate mounted
OPTO TRANSCEIVER, an OPTO cable and a terminal OPTO
TRANSCEIVER.
Figure 5.3.2.1-1
Data Exchange Channel - Category 1
The TDX crate mounted OPTO TRANSCEIVER is a standard
CR80S module capable of converting 1 V24/V28 channel
into 1 optical link signal and vice versa. On the front
panel are 2 optical link receptacles, one transmit
and one receive receptacle.
The OPTO cable is a dual optical mono fiber cable transferring
optical signals between the two types of opto transceiver.
The terminal OPTO TRANSCEIVER is capable of converting
1 V24/V28 channel, coming from the terminal, into 1
optical link signal and vice versa. The layout allows
the OPTO TRANSCEIVER to be placed within the terminal.
5.3.2.2 D̲E̲C̲ ̲-̲ ̲C̲a̲t̲e̲g̲o̲r̲y̲ ̲2̲
The cat. 2 DEC is shown on fig. 5.3.2.2-1. Facilities
to monitor the DEC traffic are also indicated.
The cat. 2 DEC consists of 1 LTUX channel and the associated
distribution equipment.
The LTUX is a standard CR80S module placed in a TDX
crate as shown in fig. 5.3.2-2. The LTUX is capable
of handling max. 4 DECs depending on transmission speed
and protocols. Towards the low speed channel devices
the LTUX provides 4 DECs. The V24/V28 MONITOR module
shown is not normally mounted. But when plugged into
the TDX crate for maintenance purposes it enables monitoring
of the LTUX V24/V28 signals via Cannon plugs on its
front panel. The V24/V28 MONITOR module is a standard
CR80S module providing monitoring access to all 4 V24/V28
channels of the LTUX.
The distribution equipment contains a TDX crate mounted
V24/V28(L) ADAPTER and a cable connecting the V24/V28(L)
ADAPTER and the CAMPS V24 Filter Assy. (Internal Distribution
Frame).
The V24/V28(L) ADAPTER converts the standard CCITT
V24/V28 signal levels to low level V24/V28 (V24/V28(L))
signals and vice versa. These low level signals conform
with the security requirements specified in CPS/210/SYS/0001
paragraph 3.4.5.1.
Figure 5.3.2.2-1…01…Data Exchange Channel - Category 2
The V24 signalling circuits and baud rates used are
as shown in table 5.3.2-4. For explanation of the V24
circuit numbers please refer to sub section 5.3.4 (Appendix
A).
The V24/V28(L) ADAPTER is a standard CR80S module capable
of converting V24/V28 lines to low level lines and
vice versa. The front panel holds CANNON plugs for
connecting cables between the module and the V24 Filter
Assy.
5.3.2.3 D̲E̲C̲ ̲-̲ ̲C̲a̲t̲e̲g̲o̲r̲y̲ ̲3̲
The cat. 3 DEC is shown on fig. 5.3.2.3-1. Monitoring
facilities concerning this DEC are also shown.
The cat. 3 DEC consists of 1 LTUX channel and the associated
distribution equipment.
The LTUX is a standard CR80S module placed in a TDX
crate as shown in fig. 5.3.2-2. The LTUX is capable
of handling max. 4 DECs depending on transmission speed
and protocols. The V24/V28 MONITOR module shown is
not normally mounted. But when plugged into the TDX
crate for maintenance purposes it enables monitoring
of the LTUX V24/V28 signals via Cannon plugs on its
front panel. The V24/V28 MONITOR module is a standard
CR80S module providing monitoring access to all 4 V24/V28
channels of the LTUX.
The distribution equipment consists of a V24/V28 ADAPTER,
a line rack mounted statistical multiplexer/demultiplexer,
a V24/V28(L) ADAPTER, a CRYPTO/MODEM block, and another
statistical multiplexer/demultiplexer.
The statistical multiplexer/demultiplexer performs
multiplexing of 8 V24/V28 channels into 1 V24/V28 channel,
and demultiplexing of 1 V24/V28 channel back to 8 V24/V28
channels. This multiplexing/demultiplexing effieciently
reduces the number of crypto- and VF-modem equipment
and modem links involved in remote terminal communication.
Mechanical dimensions are TBD.
Figure 5.3.2.3-1…01…Data Exchange Channel - Category 3
The V24/V28(L) ADAPTER converts the standard CCITT
V24/V28 signal levels to low level V24/V28 (V24/V28(L))
signals and vice versa. These low level signals conform
with the security requirements specified in CPS/210/SYS/0001
paragraph 3.4.5.1.
The V24/V28(L) ADAPTER is a standard CR80S module capable
of converting V24/V28 lines to low level lines and
vice versa. The front panel holds CANNON plugs for
connecting cables between the module and the V24 Filter
Assy.
The CRYPTO/MODEM link of the DEC connects the remote
terminal location and the CAMPS main site location
via a VF channel carrying encrypted data.
The V24 signalling circuits and baud rates used are
as shown in table 5.3.2-4. For explanation of the V24
circuit numbers please refer to sub-section 5.3.4 (Appendix
A).
5.3.2.4 D̲E̲C̲ ̲-̲ ̲C̲a̲t̲e̲g̲o̲r̲y̲ ̲4̲
The cat. 4 DEC is shown on fig. 5.3.2.4-1, and it consists
of 1 LTU channel and the associated distribution equipment.
The V24/V28 MONITOR PANEL shown is no part of the DEC,
but illustrates the possibility of monitoring access
to the LTU V24/V28 channel via the LIA-L. The V24/V28
MONITOR PANEL is a standard 19 inch rack mounted module.
The LTU is a standard CR80D front crate module placed
in the Channel Unit assembly as shown in fig. 5.3.2-3.
The LTU is capable of handling 1 or 2 DECs.
The distribution equipment consists of a LIA-L module
and a cable for connection between the LIA-L and the
IDF.
The LIA-L (Line Interface Adapter - Low level) is a
standard CR80D rear crate module placed in the Channel
Unit Assembly. The LIA-L converts the V28 signal levels
to low level (V28(L)) signals according to the security
requirements specified in CPS/210/SYS/0001 paragrapth
3.4.5.1.
Figure 5.3.2.4-1…01…Data Exchange Channel - Category 4
The LIA-L is capable of converting 2 V24/V28 channels
into two low level V24/V28(L) channels and vice versa.
The V24/V28(L) channels are connected to the IDF via
two LIA-L front panel mounted 25p Cannon plugs and
a cable. Two more 25p Cannon plugs are mounted on the
front panel of the LIA-L. These are via cables connected
to the back of the V24/V28 MONITORING PANEL. This provides
monitoring access to the V24/V28 channels between the
LTU and the LIA-L via 25p Cannon plugs on the front
of the monitoring panel.
Applicable V24 circuits and baud rates are shown in
table 5.3.2-4. For explanation of the V24 circuit numbers
please refer to section 5.3.4 (Appendix A).
5.3.2.5 D̲E̲C̲ ̲-̲ ̲C̲a̲t̲e̲g̲o̲r̲y̲ ̲5̲
This DEC cat. 5 is shown on fig. 5.3.2.5-1.
The DEC implementation conforms with the description
of the cat. 4 DEC the only difference being the number
of circuits in the V24/V28 channel. The DEC cat. 5
shows an extended number of V24 control circuits to
enable the DEC to control and monitor a CRYPTO link
in case of a connected remote NICS TARE.
Applied V24 circuits and baud rates are as shown in
table 5.3.2-4. For explanation of the V24 Circuit numbers
please refer to section 5.3.4 (Appendix A).
5.3.3 T̲e̲s̲t̲ ̲o̲f̲ ̲D̲i̲s̲t̲r̲i̲b̲u̲t̲i̲o̲n̲ ̲E̲q̲u̲i̲p̲m̲e̲n̲t̲
As described in the previous sections a Data Exchange
Channel (DEC), no matter of which category, is implemented
using the same basic structure, the line termination
unit/distribution equipment structure.
When troubleshooting a DEC, two immediate test points
are available. The first is the connection between
the DEC and the connected Terminal/external equipment.
Disconnecting and testing the DEC at this point, by
means of test equipment and off-line M&D S/W, the error
can be related to either the terminal/external equipment
or the DEC. This test can be performed without opening
the CAMPS Tempest enclosure.
The second test point is the monitoring facility. To
access this it will be necessary to open the tempest
enclosure. Testing communication at this point relates
an error to either the line termination unit or the
distribution equipment.
More specific test methods and strategies are described
in the CAMPS MAINTENANCE PLAN CPS/PLN/006, section
2.4.4.3.
5.3.4 A̲P̲P̲E̲N̲D̲I̲X̲ ̲A̲
Definition of applied V24 circuits.
(Ref. table 5.3.2-4)
C̲i̲r̲c̲u̲i̲t̲ ̲1̲0̲1̲ ̲-̲ ̲P̲r̲o̲t̲e̲c̲t̲i̲v̲e̲ ̲G̲r̲o̲u̲n̲d̲ ̲o̲r̲ ̲E̲a̲r̲t̲h̲
This conductor shall be electrically bonded to the
machine or equipment frame. It may be further connected
to external grounds as required by applicable regulations.
C̲i̲r̲c̲u̲i̲t̲ ̲1̲0̲2̲ ̲-̲ ̲S̲i̲g̲n̲a̲l̲ ̲G̲r̲o̲u̲n̲d̲ ̲o̲r̲ ̲C̲o̲m̲m̲o̲n̲ ̲R̲e̲t̲u̲r̲n̲
This conductor establishes the signal common reference
potential for unbalanced interchange circuits in the
100-series between data circuit-terminating equipment
and data terminal equipment.
C̲i̲r̲c̲u̲i̲t̲ ̲1̲0̲3̲ ̲-̲ ̲T̲r̲a̲n̲s̲m̲i̲t̲t̲e̲d̲ ̲D̲a̲t̲a̲
Direction: TO data circuit-terminating equipment.
The data signals originated by the data terminal equipment,
to be transmitted via the data channel to one or more
remote data stations, are transferred on this circuit
to the data circuit-terminating equipment.
C̲i̲r̲c̲u̲i̲t̲ ̲1̲0̲4̲ ̲-̲ ̲R̲e̲c̲e̲i̲v̲e̲d̲ ̲D̲a̲t̲a̲
Direction: FROM data circuit-terminating equipment
The data signals generated by the data circuit-terminating
equipment, in response to data channel line signals
received from a remote data station, are transferred
on this circuit to the data terminal equipment.
C̲i̲r̲c̲u̲i̲t̲ ̲1̲0̲5̲ ̲-̲ ̲R̲e̲q̲u̲e̲s̲t̲ ̲t̲o̲ ̲S̲e̲n̲d̲
Direction: TO data circuit-terminating equipment
Signals on this circuit control the data channel transmit
function of the data circuitterminating equipment
The ON condition causes the data circuit-terminating
equipment to assume the data channel transmit mode.
The OFF condition causes the data circuit-terminating
equipment to assume the data channel non-transmit mode,
when all data transferred on Circuit 103 (Transmitted
data) have been transmitted.
C̲i̲r̲c̲u̲i̲t̲ ̲1̲0̲6̲ ̲-̲ ̲R̲e̲a̲d̲y̲ ̲f̲o̲r̲ ̲S̲e̲n̲d̲i̲n̲g̲
Direction: FROM data circuit-terminating equipment
Signals on this circuit indicate whether the data circuit-terminating
equipment is conditioned to transmit data on the data
channel.
The ON condition indicates that the data circuit-terminating
equipment is conditioned to transmit data on the data
channel.
The OFF condition indicates that the data circuit-terminating
equipment is not prepared to transmit data on the data
channel.
C̲i̲r̲c̲u̲i̲t̲ ̲1̲0̲7̲ ̲-̲ ̲D̲a̲t̲a̲ ̲S̲e̲t̲ ̲R̲e̲a̲d̲y̲
Direction: FROM data circuit-terminating equipment
Signals on this circuit indicate whether the data circuit-terminating
equipment is ready to operate.
The ON condition indicates that the signal-conversion
or similar equipment is connected to the line and that
data circuit-terminating equipment is ready to exchange
further control signals with the data terminal equipment
to initiate the exchange of data.
The OFF condition indicates that the data circuit-terminating
equipment is not ready to operate.
C̲i̲r̲c̲u̲i̲t̲ ̲1̲0̲8̲/̲2̲ ̲-̲ ̲D̲a̲t̲a̲ ̲T̲e̲r̲m̲i̲n̲a̲l̲ ̲R̲e̲a̲d̲y̲
Direction: TO data circuit-terminating equipment
Signals on this circuit control switching of the signal-conversion
or similar equipment to or from the line.
The ON condition, indicating that the data terminal
equipment is ready to operate, prepares the data circuit-terminating
equipment to connect the signal conversion or similar
equipment to the line and maintains this connection
after it has been established by supplementary means.
The data terminal equipment is permitted to present
the ON condition on Circuit 108/2 whenever it is ready
to transmit or receive data.
The OFF condition causes the data circuit-terminating
equipment to remove the signal-conversion or similar
equipment from the line, when the transmission to line
of all data previously transferred on Circuit 103 has
been completed.
C̲i̲r̲c̲u̲i̲t̲ ̲1̲0̲9̲ ̲-̲ ̲D̲a̲t̲a̲ ̲C̲h̲a̲n̲n̲e̲l̲ ̲R̲e̲c̲e̲i̲v̲e̲d̲ ̲L̲i̲n̲e̲ ̲S̲i̲g̲n̲a̲l̲ ̲D̲e̲t̲e̲c̲t̲o̲r̲
Direction: FROM data circuit-terminating equipment.
Signals on this circuit indicate whether the received
data channel line signal is within appropriate limits,
as specified in the relevant recommendation for data
circuit-terminating equipment.
The ON condition indicates that the received signal
is within appropriate limits.
The OFF condition indicates that the received signal
is not within appropriate limits.
C̲i̲r̲c̲u̲i̲t̲ ̲1̲1̲3̲ ̲-̲ ̲T̲r̲a̲n̲s̲m̲i̲t̲t̲e̲r̲ ̲S̲i̲g̲n̲a̲l̲ ̲E̲l̲e̲m̲e̲n̲t̲ ̲T̲i̲m̲i̲n̲g̲ ̲(̲D̲a̲t̲a̲
̲T̲e̲r̲m̲i̲n̲a̲l̲ ̲E̲q̲u̲i̲p̲m̲e̲n̲t̲ ̲S̲o̲u̲r̲c̲e̲)̲
Direction: TO data circuit-terminating equipment.
Signals on this circuit provide the data circuit-terminating
equipment with signal element timing information.
The condition on this circuit shall be ON and OFF for
nominally equal periods of time, and the transition
from ON to OFF condition shall nominally indicate the
centre of each signal element on Circuit 103 (Transmitted
data).
C̲i̲r̲c̲u̲i̲t̲ ̲1̲1̲4̲ ̲-̲ ̲T̲r̲a̲n̲s̲m̲i̲t̲t̲e̲r̲ ̲S̲i̲g̲n̲a̲l̲ ̲E̲l̲e̲m̲e̲n̲t̲ ̲T̲i̲m̲i̲n̲g̲ ̲(̲D̲a̲t̲a̲
̲C̲i̲r̲c̲u̲i̲t̲-̲T̲e̲r̲m̲i̲n̲a̲t̲i̲n̲g̲ ̲E̲q̲u̲i̲p̲m̲e̲n̲t̲ ̲S̲o̲u̲r̲c̲e̲)̲
Direction: FROM data circuit-terminating Equipment
Signals on this circuit provide the data terminal equipment
with signal element timing information.
The condition on this circuit shall be ON and OFF for
nominally equal periods of time. The data terminal
equipment shall present a data signal on Circuit 103
(Transmitted data) in which the transitions between
signal elements nominally occur at the time of the
transitions from OFF to ON condition of Circuit 114.
C̲i̲r̲c̲u̲i̲t̲ ̲1̲1̲5̲ ̲-̲ ̲R̲e̲c̲e̲i̲v̲e̲r̲ ̲S̲i̲g̲n̲a̲l̲ ̲E̲l̲e̲m̲e̲n̲t̲ ̲T̲i̲m̲i̲n̲g̲ ̲(̲D̲a̲t̲a̲
̲C̲i̲r̲c̲u̲i̲t̲-̲T̲e̲r̲m̲i̲n̲a̲t̲i̲n̲g̲ ̲E̲q̲u̲i̲p̲m̲e̲n̲t̲ ̲S̲o̲u̲r̲c̲e̲
Direction: FROM data circuit-terminating equipment.
Signals on this circuit provide the data terminal equipment
with signal element timing information.
The condition of this circuit shall be ON and OFF for
nominally equal periods of time, and a transition from
ON to OFF condition shall nominally indicate the centre
of each signal element on Circuit 104 (Received data).
Figure 5.3.2.5-1…01…Data Exchange Channel - Category 5
