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CHAPTER 5
Page #
DOCUMENT III TECHNICAL PROPOSAL Oct. 8, 1981
Rev.: Jan. 5, 1982
LIST OF CONTENTS Page
5. EQUIPMENT CHARACTERISTICS 3
5.1 Introduction 3
5.2 Network Configuration 3
5.3 System Configuration 5
5.3.1 Network Elements 5
5.3.1.1 Compuring Elements 5
5.3.1.2 CR80 General Description 6
5.3.1.2.1 The Processor Units (PU) 8
5.3.1.2.2 The Channel Units (CU) 9
5.3.1.2.3 Bus Structures 11
5.3.1.2.4 Watchdog System 13
5.3.1.2.5 CR80 Modules 16
5.3.1.2.6 Peripheral Equipment 21
5.3.1.2.7 Mechanical Dimensions 22
5.3.1.2.7.1 Rack Dimensions 22
5.3.1.2.7.2 Peripheral Dimensions 23
5.3.1.2.8 Power Consumption 24
5.3.2 H/W Monitor 26
5.3.3 Network Nodes 26
5.3.3.1 Node Configurations 27
5.3.3.2 Equipment List 37
5.3.4 Gateway Processor 40
5.3.4.1 Gateway Configurations 41
5.3.4.2 Equipment List 46
5.3.5 Network Control Centre (NCC) 47
5.3.5.1 NCC Configuration 48
5.3.5.2 Equipment List 53
5.3.6 Electronic Mail Host 55
5.3.6.1 EMH Configurations 56
5.3.6.2 Equipment List 61
5.3.7 Network Management Host (NMH) 62
5.3.7.1 NMH Configurations 63
5.3.7.2 Equipment List 68
5.3.8 Front-End Processor (FEP) 69
5.3.8.1 FEP Configurations 70
5.3.8.2 Equipment List 76
5.3.9 Standard Expansion 79
Page
5.4 Electrical Interfaces 81
5.4.1 Host Interfaces 81
5.4.1.1 UNIVAC Interface 81
5.4.1.2 Other Host Interfaces 81
5.4.2 Communication Interfaces 82
5.4.2.1 X20 bis, X21 bis, V24 82
5.4.2.2 X21 82
5.4.2.3 X75 83
5.4.3 Future Interfaces 85
5. E̲Q̲U̲I̲P̲M̲E̲N̲T̲ ̲C̲H̲A̲R̲A̲C̲T̲E̲R̲I̲S̲T̲I̲C̲S̲
5.1 I̲n̲t̲r̲o̲d̲u̲c̲t̲i̲o̲n̲
The scope of this chapter is to show how the proposed
network are configured with dedicated CR80 processor
systems.
A description of the flexible CR80 architecture are
given in section 5.3, and at last the configuration
drawings and equipment lists for the different computers
are given.
5.2 N̲e̲t̲w̲o̲r̲k̲ ̲C̲o̲n̲f̲i̲g̲u̲r̲a̲t̲i̲o̲n̲
The proposed network are based on 2-3 sites, and can
in a modular way be expanded to an unlimited number
of sites.
The sites themselves are computer systems built around
a high speed dualized "site supra net" with a speed
of 16 M bps. which can be expanded up to 256 M bps.
Around the "site supra net" the different CR80 computer
systems are placed, as shown in figure III 5.2.1.
The types of CR80 computer systems which are proposed
to interface to the "site supra net" are:
NMH: Network Management Host
NCC: Network Control Center
EMH: Electronic Mail Host
GWY: Gateway
FEP: Front End Processor
NODE: Nodal Switch Processor
It is underlined that each of the above mentioned systems
are totally independent computer systems, only connected
to one or more of the others by the "Site Supra Net".
In this way it is seen that expansion with new or existing
functions are simply done by adding new CR80 computer
systems to the existing "Site Supra Net".
Figure III 5.2.1…01…Air Canada Proposed Network Configuration
5.3 S̲y̲s̲t̲e̲m̲ ̲C̲o̲n̲f̲i̲g̲u̲r̲a̲t̲i̲o̲n̲
5.3.1 N̲e̲t̲w̲o̲r̲k̲ ̲E̲l̲e̲m̲e̲n̲t̲s̲
Each individual subsystem is described and on related
figures the subsystem is shown in block diagrams and
detailed with all modules shown. Furthermore rack and
crate layout is shown. The drawings includes both the
initial proposed equipment and equipment for future
growth.
5.3.1.1 C̲o̲m̲p̲u̲t̲i̲n̲g̲ ̲E̲l̲e̲m̲e̲n̲t̲s̲
The overall proposed computing elements are the CR80
distributed configuraton.
5.3.1.2 C̲R̲8̲0̲ ̲G̲e̲n̲e̲r̲a̲l̲ ̲D̲e̲s̲c̲r̲i̲p̲t̲i̲o̲n̲
The Network elements are constructed by means of the
modular fault tolerant CR80 computer system by use
of various standard modules (Printed Circuit Boards)
organized in units which are interconnected by galvanic
isolated transfer bus structured as illustrated below
and shortly described in the following.
Figure III 5.3.1.2.1
The CR80 system units are housed in 19" Crates (Card
Magazine) for installation in standard 19" Racks as
shown in figure below.
Figure III 5.3.1.2.2
5.3.1.2.1 T̲h̲e̲ ̲P̲r̲o̲c̲e̲s̲s̲o̲r̲ ̲U̲n̲i̲t̲s̲ ̲(̲P̲U̲)̲
The PU is a multiprogrammable multiprocessor (up to
5 central processor Units CPU's) utilizing virtual
memory (16 mega 16 bits words) and demand paging. Messages
are transmitted from one PU to the memory of another
via the Supra Net. As all data transfers via the Supra
Net are approved by both PU's Memory Map, full hardware
protection against unintended interference between
PU's is ensured.
The PU is highly flexible because the selectance of
contained modules can be changed. The modules are interfaced
via a dual bus structure for reduct on of bus contention
as shown in figure below.
Figure III 5.3.1.2.1.1
5.3.1.2.2 T̲h̲e̲ ̲C̲h̲a̲n̲n̲e̲l̲ ̲U̲n̲i̲t̲s̲ ̲(̲C̲U̲)̲
contain the CR80 I/O Controller modules for interfacing
towards peripheral equipment, communication lines etc.
The CU has an internal dual transfer bus structure
to ensure that no single failure can stop operation
of more than one I/O Controller as shown in the figure
below.
Figure III 5.3.1.2.2.1
The transfer buses, Data Bus A and Data Bus B, are
connected to two different PU's to ensure continuous
access to the controller modules (CTRL, LTU). The characteristics
of Data Bus A and Data Bus B correspond to the internal
buses of the PU.
The CIA-modules constitute the interface between the
word oriented internal transfer buses and the byte
oriented Data Channels.
The I/O Controller modules are all based on the same
principle for interfacing to the Channel Unit bus structure
and for the external interfaces as illustrated in figure
below.
Figure III 5.3.1.2.2.2
The interface to the CR80 system employs a multiported
RAM memory through which the data are exchanged. The
program for the Controller module CPU is either resident
in PROM chips or is down loaded from the CR80. The
DISK CTRL, TAPE CTRL and PRINTER CTRL modules employ
PROM's while the Line Termination Modules (LTU) used
for interfacing communication lines, terminals etc.
are loaded with programs from the CR80 meaning that
different protocols can be supported without hardware
changes.
The physical interface to the peripherals, communication
lines etc. is an adapter module located at the rear
of the CU Crate. For interfacing to communication lines,
a special adapter module (LIA-S) is available. This
module is able to select a spare LTU module to be used
instead of a failing module. The spare LTU can be back
up for a number of active LTU's (n out of n+l redundancy).
As the internal bus structure is dualized, the power
input is taken from two separate sources to ensure
that a failure in one power source cannot stop the
CU Operation.
5.3.1.2.3 B̲u̲s̲ ̲S̲t̲r̲u̲c̲t̲u̲r̲e̲
A CR80 computing system are organized around several
busses, which are described in this seciton.
A schematic overview showing the interconnection of
the different buses and Units are given in figure III
5.3.1.2.3.1
Figure III 5.3.1.2.3.1…01…CR80 Bus Structure
Internal in a Processing Unit two buses are available
for data transfer, electrically and functionally they
are identically, the only difference are type of module
which are connected to them.
To the Processor Bus, the CPU's and Memory are connected,
and to the Channel Bus, DMA modules and memory are
connected.
A more detailed description of the Processing Units
and the modules used in it are given in section 5.3.1.2.1.
The two buses are located on each motherboard, mounted
in the back of the PU-crate.
Internal in a Channel Unit two buses are used for data
transfer, Data Bys A and Data Bus B, which are identically,
and further use the same signals as the Processor and
Channel Busses. These two busses are located on each
motherboard, mounted in the back of the CU-crates.
The Data Channel is a flat cable bus connecting one
Processing Bus and one Channel Bus (located in the
same PU) with one or more Data Busses (located in one
or more CU's.
This is done by means of the Data Channel interface
modules (MAP-MIA), CIA-A & CIA-B; for detailed information
ref. appendix A & B.
The Supra Bus is used to high speed data transfer between
processing units. The bus itself is a twisted wire
with screen.
The Configuration Control Bus ia used in the Watchdog
Subsystem. The traffic on the configuration control
bus are directives from the Watchdog about switching
of LTU's, and informaton to the Watchdog about the
Crate Power Supply Voltage levels.
5.3.1.2.4 W̲a̲t̲c̲h̲d̲o̲g̲ ̲S̲y̲s̲t̲e̲m̲
The Watchdog system used in the proposed system are
built around a low speed (600 bps) data network. Every
redundant or fully dualized CR80 computer are equipped
with a Watchdog.
All watchdogs in the system are connected, via a 600
bps line, to both the active and the standby NCC.
The information which are routed through this low speed
net are only basal information of computer status,
and directives to switch LTU's or Master clearing of
processing Units.
All other information from the CR80 computers (EMH,
FEP etc.), statistic ect. are routed the normal network.
An example on a Watchdog Net are shown overleaf in
figure III 5.3.1.2.4.1.
All watchdog's in the system are placed in one of the
CU's connected to the CR80 to be supervised.
Figure III 5.3.1.2.4.1 Watchdog Net
The Watchdog consist of four parts:
o A normal LTU
o A Watchdog Controller Adapter (WCA)
o A Watchdog Panel Controller (WPC)
o A Watchdog panel
The interconnection is shown below.
Figure III 5.3.1.2.4.2
The Watchdog is used only for local supervision and
control, the network supervision and Control are carried
out by the Network Control Centers (NCC).
5.3.1.2.5 C̲R̲8̲0̲ ̲M̲o̲d̲u̲l̲e̲s̲
The proposed CR80 computers are built with a few standard
modules and some adapters, the modules proposed to
be used in the Air Canada Data Network are given, with
a short list of chararacteristics, on the following
pages:
MAP CR8020M/000PC/00
CHARACTERISTICS:
o Extend the CR80 CPU address space to 16 mega words
by logical-to-physical address translation.
o Gives protection of every part of the address space:
Absent indication, read only access, No access,
Full access.
o Microprocessor included for interrupt processing,
DMA, and AV24 handling.
o DMA controller performs move of data buffers within
the total address space-including I/O Modules.
o Data Channel and V24 communications port.
o System control functions included:
Channel- and Processor Bus Arbitration, Clock generation,
250 us Fast Timer, Real time clock, Power failure
detection, Master Clear, PU Disable, Maintenance
Module.
o BIT. A built-in test procedure is initiated upon
power up and a red test LED is extinguished after
app. 10 sec. if it has been carried out successfully.
CPU/CACHE CR8003M/xxxxx/xx
CHARACTERISTICS:
o 16 bit general purpose CPU with interface 1K word
cache memory for use in the CR80 system.
o Internal test facilities, providing extensive online
and off-line test capabilities.
o Can be used in multiprocessor system.
o Operates with and without MAP module.
o Cache memory transparent to software
o A built in test procedure is initiated upon power
up and a red test LED is extinguished after app.
1 sec. if the test has been carried out successfully.
o One mode of instruction is used to implement the
CR80 standard instruction set.
o A second mode of instruction is used to implement
an instruction set well suited for high level languages
like Algol, PASCAL, ADA, etc. This mode also allows
customer defined instructions to be implemented.
RAM CR8016M/128PC/00
CHARACTERISTICS:
o 128KW Random Access Memory for the CR80 system.
o Dual ported, for Processor Bus and Channel Bus
Interface.
o Part of the memory can be disabled.
o A maximum of 2.6M access per second.
o 2.54% occupatin due to refresh.
DISK CTRL CR8044M/=41AB/xx
CHARACTERISTICS:
o Disk Controller/Formatter combined with 32K memory
for CR80 system.
o Disk Controller accessible as an I/O module.
o RAM accessible as a normal memory module.
o Interfaces 1-4 disk drives.
o Any combination of drives from CDC's SMD, MMD,
and CMD families is possible.
o The dual channel feature of the disk drives is
supported.
o Main disk operations are:
Seek, Read, Write, Seek and Read, Seek and Write,
Format, Read address field.
o BIT. A built.in test procedure is initiated upon
power up and a red test LED is extinguished after
app. 10 sec. if the test has been carried out successfully.
LTU CR8066M/xxxAB/xx
CHARACTERISTICS:
o Standard CR80 I/O module
o Standard CR80 RAM with 16K word memory.
o Dual bus interface for channel bus interface.
o I/O address is setable.
o RAM location is setable.
o Bootloader PROM 2K or 4K selected by strap.
o 4 V24/V28 communication lins.
STI CR8021M/010-C/00
CHARACTERISTICS:
o Interface from the CR80 computers to the Supra
Net.
o On board 32K byte RAM for descriptors.
o One u-processor for Outgoing data and one U-processor
for ingoing data.
o DMA capability for data transfer to/from CR80 memory
via the channel Bus.
St. FD CTRL CR8047M/xxxAB/xx
CHARACTERISTICS:
o Floppy disk controller for the CR80 system.
o Interfaces up to 4 Floppy disk drives.
o Single and 2-sided diskettes.
o IBM 3740 Data Format (single density).
o Dualized bus I/F for high reliable data exchange
in channel units (redundant system)
o Parity check/generation, at each module access.
o The switching between A-Bus and B-Bus I/F is fully
software controlled.
o I/O Interrupt after each operation.
o Internal Buffer RAM contains 64 words (1 sector)
o Obtainable speed app. 1 word/2 usec.
o BIT. A built-in test procedure is initiated upon
power up and a red test LED is extinguished after
app. 10 sec. if it has been carried out successfully.
Parallel CTRL, Line Printer Appl. CR8046M/040AB/00
CHARACTERISTICS:
o Parallel Controller combined with 16K memory.
o Controller accessable as an I/O module.
o RAM accessable as a normal memory module with 16
bits data and 2 bits parity.
o Connection of up to 4 line printers selected from
the Data Products Corporation or Control Data Corporation
series of line printers.
o Dual bus port.
o Memory Transfer Rates:
To/from Main Bus: 2M words/sec.
To line printer: 250K byte/sec.
o BIT. A built.in test procedure is activated on
power up.
UNIVAC I/F CR8037M/040AB/00
CHARACTERISTICS:
o Interface from CR80 to a UNIVAC series 1100 ISI
input/output channel pair, combined with 16K memory.
o Interface controller accessible as an I/O module.
o RAM serves as data buffer and is accessible as
a normal memory module with 16 bits data and 2
bits parity.
o Dual bus ports.
o Data transfer to/from UNIVAC: 1 Mchar/sec. (max).
o BIT. A built-in test procedure is initiated upon
power up and a red test LED is extinguished after
app. 1 sec. if the test has been carried out successfully.
5.3.1.2.6 P̲e̲i̲p̲h̲e̲r̲a̲l̲ ̲E̲q̲u̲i̲p̲m̲e̲n̲t̲
Below is listed the proposed peripheral equipment for
each individual subsystem.
N̲O̲D̲E̲:̲ 2 x Disc 80 Mb MMD CR8302-/080
1 x System Console CR8392-/743
G̲a̲t̲e̲w̲a̲y̲:̲ 1 x Floppy Disc CR8308-/116
1 x System Console CR8392-/743
N̲M̲H̲:̲ 1 x Disc 80 Mb MMD CR8302-/080
1 x Disc 80 Mb SMD CR8300-/080
1 x Line Printer 600 LPM CR8331-/600
1 x Floppy Disc CR8308-/116
1 x Tape Deck CR8320-/075
3 x VDU CR8350-/005
N̲C̲C̲:̲ 1 x Floppy Disc CR8303-/116
2 x VDU CR8350-/005
2 x Low Speed Printers CR8392-/743
1 x Colour Display
E̲M̲H̲:̲ 2 x Disc 80 Mb MMD CR8302-/080
1 x Disc 80 Mb SMD CR8300-/080
1 x Line Printer 600 LPM CR8331-/600
4 x VDU CR8350-/005
1 x System Console CR8392-/743
F̲E̲P̲:̲ 2 x Disc 80 Mb MMD CR8302-/080
1 x System Console CR8392-/743
5.3.1.2.7 M̲e̲c̲h̲a̲n̲i̲c̲a̲l̲ ̲D̲i̲m̲e̲n̲s̲i̲o̲n̲s̲
5.3.1.2.7.1 R̲a̲c̲k̲ ̲D̲i̲m̲e̲n̲s̲i̲o̲n̲s̲
All CR80 hardware modules are placed in 19" non-corrosive
metal frames with a height of 10 U (445 mm) and
a weight of 26 kg. These crates are again inserted
into racks in this way it is possible to built
up large computer systems in a very modular way.
If necessary more racks can be assembled side by
side in a unlimited number to form a large subsystem
by using a mech. kit.
In the Air Canada proposal this flexibility have
been of great value because of the many subsystems
of different size and because of the expansion
requirements. Each rack is useful in 36 U (1602
mm) and in 19" width. The overall dimensions of
each rack is shown below:
o Height: 1,8 m
o Width : 0,6 m
o Depth : 0,73 m
The overall rack dimensions for each individual
proposed subsystem is listed below:
Description Dimensions (HxWxD) (m)
Node: 1,8 x 2,4 x 0,73
Gateway: 1,8 x 0,6 x 0,73
Electronic Mail Host: 1,8 x 1,2 x 0,73
Network Management Host: 1,8 x 0,6 x 0,73
Network Control Centre: 1,8 x 0,6 x 0,73
Front End Processor: 1,8 x 1,2 x 0,73
5.3.1.2.7.2 P̲e̲r̲i̲p̲h̲e̲r̲a̲l̲ ̲D̲i̲m̲e̲n̲s̲i̲o̲n̲s̲
All peripheral except from MMD disc drives, Tape
Deck and Floppy disc drives are placed outside
the rack.
Below are listed dimentions of all proposed peripheral
equipment:
Description Dimensions (HxWxD)
(m)
Disc Drive SMD 0,86 x 0,48 x 0,86
Line Printer (ex.pedestal) 0,38 x 0,77 x 0,64
Operators Console 0,18 x 0,57 x 0,40
VDU 0,33 x 0,43 x 0,41
A possible floor layout can be seen in chapter
III 9.4.3.3
5.3.1.2.8 P̲o̲w̲e̲r̲ ̲C̲o̲n̲s̲u̲m̲p̲t̲i̲o̲n̲
Below is listed the power consumption of each individual
subsystem including terminals and peripherals in each
individual geographic area.
Power consumption of each piece of equipment proposed
can be found in table III 5.3.1.7.4.
S̲i̲t̲e̲ ̲T̲o̲r̲o̲n̲t̲o̲:̲
Node 5,2 KW
Electronic Mail Host 4,3 "
Network Control Center 1,8 "
Gateway 1,5 "
Network Management Host 3,4 "
Front End Processor ̲ ̲2̲,̲2̲ ̲ ̲"̲ ̲
Total Power Consumption ̲1̲8̲,̲4̲ ̲K̲W̲ ̲
S̲i̲t̲e̲ ̲M̲o̲n̲t̲r̲e̲a̲l̲:̲
Node 5,2 KW
Network Control Center 1,8 "
Front End Processor ̲ ̲2̲,̲2̲ ̲ ̲"̲ ̲
Total Power Consumption ̲ ̲9̲,̲2̲ ̲K̲W̲
S̲i̲t̲e̲ ̲W̲i̲n̲n̲i̲p̲e̲g̲:̲
Node 5,2 KW
FEP ̲ ̲2̲,̲2̲ ̲ ̲"̲
Total Power Consumption ̲ ̲7̲,̲4̲ ̲K̲W̲ ̲
T̲a̲b̲l̲e̲ ̲5̲.̲3̲.̲1̲.̲8̲.̲1̲ ̲ ̲E̲Q̲U̲I̲P̲M̲E̲N̲T̲ ̲P̲O̲W̲E̲R̲ ̲C̲O̲N̲S̲U̲M̲P̲T̲I̲O̲N̲
Description Type No. Power Consumption (W)
STI CR8021M 38
128K RAM CR8016M 31
CPU CACHE CR8003M 90
MAP CR8020M 65
MIA CR8071M 21
CCA CR8089M 20
CIA CR8081M 15
SBA CR8072M 17
DISC CTRL CR8044M 37
DUAL PAR CTRL CR8046M 37
LTU CR8066M 25
WPC CR8040M 32
WCA CR8076M 13
DCA CR8084M 6
PCA CR8086M 8
LIA-S CR8083M 3
UNIVAC CTRL CR8037M 39
MBT CR8055M 2
TAPE CTR CR8045M 37
F.D. CTRL CR8047M 18
TCA CR8085M 8
DISC MMD CR8302 400
DISC SMD CR8300 900
F.D. DRIVE CR8308 110
TAPE DECK CR8320 500
LINE PRINTER CR8331 275
VDU CR8350 120
O.P. CONSOLE CR8390 250
FAN UNIT CR8105 150
5.3.2 H̲/̲W̲ ̲M̲o̲n̲i̲t̲o̲r̲
A H/W monitor, which is able to measure CPU load, is
included in the standard S/W package.
This utility program named "performance" is described
in the S/W section of this proposal.
As an option a special H/W-module can be developed.
This monitor will be a plug-in module, which can measure
bus load on the different busses (processor, channel
& Data busses)
5.3.3 N̲e̲t̲w̲o̲r̲k̲ ̲N̲o̲d̲e̲s̲
Three packet switching nodes are proposed, placed in
Toronto, Montreal and Winnipeg.
In the 1983 proposal only two nodes are included while
the last one will be installed in 1984.
The network can be expanded nearly unlimited by simply
adding more nodes and if necessary more front-end processors.
The two nodes in Toronto and Montreal are wired for
1984 requirements, but installed with 1983 requirements.
This means that the initially proposed nodes include
three PU crates. One dedicated as back-up PU and one
as active PU. The third PU crate is empty but wired
and will be filled with modules during 1984 accordingly
with the network growth.
In 1985 further one PU crate is added and connected
to the other PU's via the supra bus forming the final
proposed network. If future growth should require
more processing power, more PU's can be added. All
three PU' are using the same PU back-up. The H/W Configuration
of the three nodes are exact copies of each other,
while the node access is placed in separate FEP's.
…86…1 …02… …02… …02… …02…
5.3.3.1 N̲o̲d̲e̲ ̲C̲o̲n̲f̲i̲g̲u̲r̲a̲t̲i̲o̲n̲s̲
Figure III 5.3.3.1.1
Figure III 5.3.3.1.2
Figure III 5.3.3.1.3
Figure III 5.3.3.1.4
Figure III 5.3.3.1.5
Figure III 5.3.3.1.6
Figure III 5.3.3.1.7
Figure III 5.3.3.1.8
Figure III 5.3.3.1.9
Figure III 5.3.3.1.10
5.3.2.2 E̲q̲u̲i̲p̲m̲e̲n̲t̲ ̲L̲i̲s̲t̲
NODT1.1.1 Node Toronto
NODM1.2.1 Node Montreal
NODW1.3.1 Node Winnipeg
5.3.4 G̲a̲t̲e̲w̲a̲y̲ ̲P̲r̲o̲c̲e̲s̲s̲o̲r̲
The Gateway Processor is a fully redundant processor
which reside in a one bay rack system. The processor
Unit Crate is divided into two independent systems
each containing a processor bus and a channel bus.
One of the systems is dedicated to be the active processor
while the other system acts as a back-up processor
both supervised and controlled from the watchdog. The
two systems are connected via the supra bus which also
is used as the link between the Gateway and the new
network.
Because of performance requirements several LTU's are
used as interface modules between the Gateway and the
ACNC network operating in a full duplex mode at a speed
of 9600 bps.
In case of LTU failure a spare LTU has been included
which automatical will be switched on in the position
of the erroneous LTU. This is also supported by the
Watchdog.
For loading the system a floppy disc drive has been
included. It is connected to the F.D. CTRL/SFA which
supports four disc'.
As shown on figure III 5.3.4.1.2 the watchdog is connected
to both the NCC's by means of V24 Modem links to provide
global operations control for the entire system.
5.3.4.1 G̲a̲t̲e̲w̲a̲y̲ ̲C̲o̲n̲f̲i̲g̲u̲r̲a̲t̲i̲o̲n̲s̲
Figure III 5.3.4.1.1
Figure III 5.3.4.1.2
Figure III 5.3.4.1.3
Figure III 5.3.4.1.4
Figure III 5.3.4.1.5
5.3.4.2 E̲q̲u̲i̲p̲m̲e̲n̲t̲ ̲L̲i̲s̲t̲
Gateway 1.1.5
5.3.5 N̲e̲t̲w̲o̲r̲k̲ ̲C̲o̲n̲t̲r̲o̲l̲ ̲C̲e̲n̲t̲r̲e̲ ̲(̲N̲C̲C̲)̲
The Network Control Centre is built as a stand-alone
unit which does not include any redundancy. However
a back-up NCC is placed in a geographically different
location from the active. All hardware modules reside
in a one-bay rack which also includes the Floppy disc
drive.
In order to obtain the control and monitoring functions
of the NCC it has been equipped with some special terminals.
On a colour Display the hole network topology is shown.
In case of trunk failure this is immediately shown
in the display. Furthermore two printers are dedicated
for event log and alarm printning.
Communication to and from the NCC's takes place on
the supra bus net but furthermore the NCC's are connected
to all watchdogs in the system in order to monitor,
control and reconfigure the system.
The NCC's are wired for 1985 use, in order to expand
without disturbing the system. The only thing necessary
is to add on modules.
5.3.5.1 N̲C̲C̲ ̲C̲o̲n̲f̲i̲g̲u̲r̲a̲t̲i̲o̲n̲
Figure III 5.3.5.1.1
Figure III 5.3.5.1.2
Figure III 5.3.5.1.3
Figure III 5.3.5.1.4
Figure III 5.3.5.1.5
5.3.5.2 E̲q̲u̲i̲p̲m̲e̲n̲t̲ ̲L̲i̲s̲t̲
NCCT 1.1.2
NCCM 1.2.2
5.3.6 E̲l̲e̲c̲t̲r̲o̲n̲i̲c̲ ̲M̲a̲i̲l̲ ̲H̲o̲s̲t̲ ̲(̲E̲M̲H̲)̲
The hardware components in the Electronic Mail Host
is very much similar to the NMH except from the processing
power and memory. Furthermore it is a fully redundant
system residing as a stand-alone unit in a two bay-rack
system which also includes two MMD 80 Mb disc drives
with 2 Mb fixed head each connected to separate disc
controllers.
Besides from text editing, message routing etc. from
connected terminals the EMH have the capability of
supporting links to the CNT, ARINC, and SITA networks.
This is done by means of LTU's, which can be expanded
in quantity in the existing crates.
5.3.6.1 E̲M̲H̲ ̲C̲o̲n̲f̲i̲g̲u̲r̲a̲t̲i̲o̲n̲s̲
Figure III 5.3.6.1.1
Figure III 5.3.6.1.2
Figure III 5.3.6.1.3
Figure III 5.3.6.1.4
Figure III 5.3.6.1.5
5.3.6.2 E̲q̲u̲i̲p̲o̲m̲e̲n̲t̲ ̲L̲i̲s̲t̲
EMH 1.1.4
5.3.7 N̲e̲t̲w̲o̲r̲k̲ ̲M̲a̲n̲a̲g̲e̲m̲e̲n̲t̲ ̲H̲o̲s̲t̲ ̲(̲N̲M̲H̲)̲
The Network Management Host is a stand-alone medium
size non-redundant computer which reside in its own
two-bay racks. One rack equipped with Processor and
Channel unit and one equipped with a tape station and
disc (refer to figure III 5.3.7.1.3).
The communication to and from the NMH will take place
via the supra bus to the NODE XXZ and the normally
active NCC but is also via trunks connected to the
back-up NCC placed in Montreal.
In order to fulfil the required different software
services related to network management such as software
development, maintaining and updating service and configuration
data the EMH is equipped with necessary software development
terminals and peripheral storage. The proposed terminals
are three interactive VDU's and a 600 lines per minute
band printer but these quantities can be expanded for
future needs without interrupting the system by simply
adding more LTU's and LIA-s in the existing CU Crate.
Each LTU is capable of managing up to four VDU's.
The proposed peripheral storage capacity is two disc
drives each of 80 Mb with 2 Mb fixed head for fast
access and with fixed disc packs. These resides in
the most right side rack while a further 80 Mb with
removal disc pack is placed separately outside the
rack.
5.3.7.1 N̲M̲H̲ ̲C̲o̲n̲f̲i̲g̲u̲r̲a̲t̲i̲o̲n̲s̲
Figure III 5.3.7.1.1
Figure III 5.3.7.1.2
Figure III 5.3.7.1.3
Figure III 5.3.7.1.4
Figure III 5.3.7.1.5
5.3.7.2E̲q̲u̲i̲p̲m̲e̲n̲t̲ ̲L̲i̲s̲t̲
NMH 1.1.3
5.3.8 F̲r̲o̲n̲t̲-̲E̲n̲d̲ ̲P̲r̲o̲c̲e̲s̲s̲o̲r̲ ̲(̲F̲E̲P̲)̲
Nearly all Hosts are connected to the proposed network
via dedicated front-end processors placed one at each
node. In this way the H/W is prepared for local Host
to Host communication and can easily be expanded to
remote Host communication forming a dedicated Host
network. The front-end processors are fully redundant
systems residing in a two bay rack system. The initial
1983 proposed configuration is shown in fig. III 5.3.5.1.2
and installed in Toronto and Montreal, but it is wired
for 1985 requirements.
Each time a new Host is conneced to the FEP, a CPU
Cache and a 128K RAM must be added. This can be done
for up to four Hosts within the proposed wiring. If
further expansion in the future is necessary, then
standard expansion crates can be used (refer to section
5.3.9).
5.3.8.1 F̲E̲P̲ ̲C̲o̲n̲f̲i̲g̲u̲r̲a̲t̲i̲o̲n̲s̲
Figure III 5.3.8.1.1
Figure III 5.3.8.1.2
Intentionally left blank
Figure III 5.3.8.1.3
Figure III 5.3.8.1.4
Figure III 5.3.8.1.5
5.3.8.2 E̲q̲u̲i̲p̲m̲e̲n̲t̲ ̲L̲i̲s̲t̲
FEPT 1.1.6
FEPM 1.2.6
FEPW 1.3.2
5.3.9 S̲t̲a̲n̲d̲a̲r̲d̲ ̲E̲x̲p̲a̲n̲s̲i̲o̲n̲
The expansion from the baseline configuration through
the remaining of this decenial to 1991 will be heavily
dependent on the evolution of the Air Canada network.
It will depend on how traffic evolves and on how allocation
of host computers and concentrator trunk connections
takes place.
The CR80 provides Air Canada with a computer architecture
well suited towards this dynamic environment. It provides
an architecture which enables evolution to take place
in small increments taylored to the needs. Increments
based, as the baseline configuraton, on standard CR80
modules.
Based on the projected expansion of the Air Canada
Data Network represented by
- traffic statistics (Fig. III, 2.3.2.1)
- interaction profile (Fig. III, 2.3.2.2
and the traffic model presented in Appendix D. The
following summarizes the projected capabilities required
for each of the three sites:
̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲
̲ ̲ ̲ ̲ ̲ ̲ ̲
YEAR ICC-TYPE 56Kbps TRUNKS TRANSACTIONS/SEC
̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲L̲I̲N̲E̲S̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲7̲0̲%̲ ̲U̲t̲i̲l̲i̲z̲a̲t̲i̲o̲n̲ ̲ ̲ ̲(̲p̲e̲a̲k̲ ̲h̲o̲u̲r̲)̲ ̲ ̲ ̲
̲ ̲ ̲ ̲ ̲ ̲ ̲
T M W T-M T-W W-M T M
W
85 112 84 84 3.0 3.2 .6 348.5 132.5
138.5
86 135 101 101 3.6 3.9 .7 417.5 158.7
165.9
87 161 121 121 4.3 4.6 .9 501.7 190.7
199.4
88 194 145 145 5.1 5.6 1.0 602.1 228.9
289.3
89 232 174 174 6.2 6.7 1.2 722.6 274.7
287.2
90 279 209 209 7.4 8.0 1.5 867.1 329.7
344.6
91 334 251 251 8.9 9.6 1.8 1040.5 395.6
413.5
̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲
̲ ̲ ̲ ̲ ̲ ̲ ̲
Figure 5.3.9.1 Projected Traffic
To enable a graceful evolution, we propose the use
of the following three basic expansion elements:
o Empty rack with
- mains filer
- power distribution
o Nodal Switch Processor, with
- 4 CPU/CACHEs
- 4 128 K RAM
- MAP/SCM/IO
- STI
- Crate, Power Supply, etc.
o Nodal Channel Unit with
- 11 Line Terminating Units
- Crate, Power Supply, etc.
Based on the above expansion elements the following
projected 86 through 91 expansions will have to take
place
Toronto Montreal Winnipeg
a b c a b c a b c
1985 minor adjustments
1986 1 0 2 1 0 1
1987 1 1 1 0 0 1
1988 2 1 2 2 1 2 as Montreal
1989 2 1 2 1 0 1
1990 2 2 2 2 1 2
1991 3 2 3 1 0 2
Configuration adjustments from the above may be required,
if the future load assignment differs from the projecte.
However, this will only result in re-assignment of
basic expansion elements within the scope of the proposed
architecture.
5.3.9.1 E̲x̲p̲a̲n̲s̲i̲o̲n̲ ̲E̲l̲e̲m̲e̲n̲t̲ ̲C̲o̲n̲f̲i̲g̲u̲r̲a̲t̲i̲o̲n̲s̲
a. E̲m̲p̲t̲y̲ ̲R̲a̲c̲k̲
b. N̲o̲d̲a̲l̲ ̲S̲w̲i̲t̲c̲h̲i̲n̲g̲ ̲P̲r̲o̲c̲e̲s̲s̲o̲r̲
c. N̲o̲d̲a̲l̲ ̲C̲h̲a̲n̲n̲e̲l̲ ̲U̲n̲i̲t̲
5.3.9.2 E̲q̲u̲i̲p̲m̲e̲n̲t̲ ̲L̲i̲s̲t̲
a. E̲m̲p̲t̲y̲ ̲R̲a̲c̲k̲
b. N̲o̲d̲a̲l̲ ̲S̲w̲i̲t̲c̲h̲i̲n̲g̲ ̲P̲r̲o̲c̲e̲s̲s̲o̲r̲
c. N̲o̲d̲a̲l̲ ̲C̲h̲a̲n̲n̲e̲l̲ ̲U̲n̲i̲t̲
Figure III 5.3.9.1…01…Node Standard Expansion Rack Layout
5.4 E̲l̲e̲c̲t̲r̲i̲c̲a̲l̲ ̲I̲n̲t̲e̲r̲f̲a̲c̲e̲s̲
This section gives the details about the electrically
interfaces (V28, X21 etc.) used in the proposed network.
5.4.1 H̲o̲s̲t̲ ̲I̲n̲t̲e̲r̲f̲a̲c̲e̲
This section gives details about the proposed UNIVAC
channel interface, and of the other Host I/F's which
present are available on the CR80 system.
5.4.1.1 U̲N̲I̲V̲A̲C̲ ̲I̲n̲t̲e̲r̲f̲a̲c̲e̲
The UNIVAC I/F CR8037M is together with the UNIVAC
I/F adapter CR8079M able to connect a CR80 to the Univac
1100 ISI channel pair, with a maximum throughput of
1M char/sec.
The data transfer to/from the UNIVAC computer via the
data buffers located in the UNIVAC I/F, the buffers
form a part of the CR80 Memory space.
Further the UNIVAC I/F conform to the specifications
given in UNIVAC 1110 PROCESSOR I/O Interfaces, SP2025.
5.4.1.2 O̲t̲h̲e̲r̲ ̲H̲o̲s̲t̲ ̲I̲n̲t̲e̲r̲f̲a̲c̲e̲s̲
At the present a IBM Channel I/F and ICL I/F are available.
Both of these two interfaces are constructed in the
same way as the Univac I/F, i.e. with internal data
buffers which forms a part of the CR80 memory space.
The IBM Channel I/F CR8039M operates on a IBM 360/370
Block Multiplexor Channel, with a transfer rate of
200K Bytes/sec. otherwise the Interface satisfy the
specifications given in.
IBM system 360 and system 370 I/O Interface Channel
to Control Unit Original Equipment Manufacturers Information
(GA22-6974-3).
The ICL I/F CR(038 connect up to eight ICL Main Frame
to the CR(0 via ICL I/F adapters, with a maximum data
transfer rate of 400K bytes/sec.
5.4.2 C̲o̲m̲m̲u̲n̲i̲c̲a̲t̲i̲o̲n̲ ̲I̲n̲t̲e̲r̲f̲a̲c̲e̲s̲
The communication interfaces for the proposed initial
configurations are located in the Channel Units and
consist of line termination modules (LTUs) and line
interface adapters LIA's as shown in figure 5.4.2 overleaf.
Different types of these two modules will be used in
the configuration. The different types will be based
upon the existing design (Ref. appendix B CR80 Data
Sheet) LTU CR3066M/XXAB/XX which has the following
features.
L̲I̲A̲ ̲M̲o̲d̲u̲l̲e̲
Two types are at present available:
LIA-N Non switching LIA which interfaces up to four
LTU communication ports to the communication
lines.
LIA-S Switching LIA which controlled from the CCA
can select a spare LTU instead of a failing
one.
5.4.2.1 X̲2̲0̲ ̲b̲i̲s̲,̲ ̲X̲2̲1̲ ̲b̲i̲s̲,̲ ̲V̲2̲4̲
The LTU modules used for these interfaces are identical
and are at the present available CR8066M/XXAB/XX, please
refer Appendix B. The programmes down loaded from
the CR80 processor unit are described in the software
section of this technical proposal.
The LIA used will be the switching (LIA-S) for dedicated
circuits and the non switching (LIA-N) for switched
circuits as these can be directed to an alternative
LTU if a LTU failure occurs. For LIA characteristic
please refer to Appendix B "CR80 Data Sheets"
5.4.2.2 X̲2̲1̲
The LTU modules used for this interface are identical
to the presently available LTU, ref. data sheets, except
for the electrical characteristics and functions of
the interchange circuits which will be changed to comply
with X21. Up to two channels will be available for
bit rates up to and including 9600 `bits/s, or one
channels for bit rates up to 98000 bits/s (software
control). As for the existing LTU the programmes will
be down loaded from the CR80 PU.
The LIA to be used for this interface will be a modified
version for compliance with the connector specifications.
Both switching and non switching LIA's are used in
the system.
5.4.2.3 X̲7̲5̲
The LTU modules used for this interface are identical
to the presently available LTU's except for line interface
which will be changed to comply with X75. Only one
port will be available which can be operated at 56000
bit/s.
As for the existing LTU the programmes will be down
loaded from the CR80 PU.
Only non switching LIA modules are proposed as the
links are expected to be dualized.
Fig. III 5.4.2.1 Communication Interfaces.
5.4.3 F̲u̲t̲u̲r̲e̲ ̲I̲n̲t̲e̲r̲f̲a̲c̲e̲
One of the interfaces which are expected to be developed
in the future is X22, and for interfacing of this multiplexed
link two new modules are expected to be designed.
The modules will be located in the Channel Unit - (CU)
as shown in figure 5.4.3.1 overleaf.
The "X 22 LINE ADAPTER" has to demultiplex/multiplex
up to 80 subscriber channels of recommendation X.21
and for each channel administrates the fully X.21 protocol.
On a higher level according to which format is chosen
- it has to detect/insert "FLAG" or "SYNCHARACTERS",
detect/insert "BIT-STUFFING" and control/insert "CRC-BYTES".
Figure 5.4.3.2 shows the Block Diagram for the "X22
LINE ADAPTER".
The "X22 LTU" administrates for each channel the highest
data transport level. The Packet Protocol" - including
channel set-up, handshaking and arranging retransmissions
if data is lost or erroneous. Furthermore, it interfaces
the "X22 LINE ADAPTER" to the CR80 bus. On figure
5.4.3.3 the Block Diagram for the "X22 LTU" is shown.
Fig. III 5.4.3.1
Fig. III 5.4.3.2 X22 Line Adapter Block Diagram
Fig. III 5.4.3.3 X22 LTU Block Diagram
