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Notes: AIR CANADA PROPOSAL
Names: »2097A «
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CHAPTER
6
Page #
DOCUMENT III TECHNICAL PROPOSAL Apr. 29,
1982
LIST OF CONTENTS Page
6. SOFTWARE CHARACTERISTICS.................... 7
6.1 Introduction................................ 8
6.2 CR80 Standard System Software .............. 9
6.2.1 Overview of DAMOS Operational Software ..... 12
6.2.2 Security ................................... 14
6.2.3 Kernel ..................................... 16
6.2.3.1 Resource Management ........................ 17
6.2.3.2 Process Management ......................... 18
6.2.3.3 Memory Management .......................... 18
6.2.3.4 Process Communication....................... 18
6.2.3.5 CPU Management.............................. 19
6.2.3.6 Processing Unit Management.................. 19
6.2.3.7 BASIC Transport Service..................... 20
6.2.3.7.1 Service Types...............................
22
6.2.4 DAMOS Input/Output.......................... 23
6.2.4.1 File Management System...................... 25
6.2.4.1.1 Service and Volume Handling.................
25
6.2.4.1.2 Directories.................................
26
6.2.4.1.3 Files.......................................
26
6.2.4.1.3.1 File Types................................. 26
6.2.4.1.3.2 File Commands.............................. 26
6.2.4.1.4 User Handling...............................
27
6.2.4.1.5 Disk Integrity..............................
27
6.2.4.1.5.1 Security................................... 27
6.2.4.1.5.2 Redundant Disks............................ 27
6.2.4.1.5.3 Bad Sectors................................ 28
6.2.4.1.6 Access Methods..............................
28
6.2.4.1.6.1 Unstructured Access........................ 28
6.2.4.1.6.2 Indexed Sequential Access.................. 28
6.2.4.2 Magnetic Tape File Management System........ 29
6.2.4.2.1 Device Functions............................
30
6.2.4.2.2 Volume Functions............................
30
6.2.4.2.3 File Functions..............................
30
6.2.4.2.4 Record Functions............................
30
6.2.4.3 Terminal Management System.................. 31
6.2.4.3.1 Transfer of I/O Data........................
31
6.2.4.3.1.1 File Mode.................................. 31
6.2.4.3.1.2 Communication Mode......................... 32
6.2.4.3.2 User Handling...............................
34
6.2.4.3.3 Hardware Categories.........................
34
6.2.4.3.3.1 Terminal Controllers....................... 35
6.2.4.3.3.2 Lines...................................... 35
6.2.4.3.3.3 Units...................................... 35
6.2.5 System Initialization....................... 37
6.2.6 System Initialization....................... 38
6.2.6.1 Terminal Operating System (TOS)............. 38
6.2.6.2 Language Processors......................... 39
6.2.6.3 System Generation Software.................. 40
6.2.6.4 Debugging Software.......................... 40
6.2.6.5 Utilities................................... 40
6.2.6 Standard Support Software................... 41
6.2.6.1 Terminal Operating System (TOS)............. 41
6.2.6.2 Language Processors......................... 42
6.2.6.3 System Generation Software.................. 43
6.2.6.4 Debugging Software.......................... 43
6.2.6.5 Utilities................................... 43
6.2.6.6 Diagnostic Programs......................... 44
6.2.6.6.1 Off-line Diagnostic Program.................
44
6.2.6.6.2 On-Line Diagnostic Program..................
44
6.2.7 Diagnostic Program.......................... 45
6.2.7.1 Off-line Diagnostic Programs................ 45
6.2.7.2 On-Line Diagnostic Programs................. 45
6.3 Transport Mechanisms........................ 46
6.3.1 BTS Environment............................. 46
6.3.2 Basic Datagram Service...................... 52
6.4 Data Flow and Network Tables................ 55
6.4.1 Network Tables.............................. 55
6.4.1.1 Global Network Tables....................... 55
6.4.1.2 Local Network Tables........................ 56
6.4.2 Network Tables Maintenance and Usage........ 56
6.4.3 Session Data Flow........................... 60
6.4.3.1 Terminal user logs on....................... 65
6.4.3.2 Terminal User logs on to Univac
host applications........................... 66
6.4.3.3 Terminal user logs on to IBM host
application................................. 68
6.5 Communications Environment.................. 70
6.5.1 Commmunication User Environment (CUE)....... 70
6.5.1.1 Session-Conversion Management............... 72
6.5.1.1.1 Session-Conversation Establishment..........
72
6.5.1.1.2 Session-Conversation Data Transfer..........
72
6.5.1.1.3 Session-Conversation Termination............
73
6.5.2 Data Transmission Environment............... 73
6.5.2.1 DTrE Services............................... 73
6.5.2.2 Datagram Services (DGS)..................... 76
6.5.2.2.1 Addressing Structure........................
77
6.5.2.2.2 Datagram Format.............................
80
6.5.2.2.3 Datagram Primitives.........................
84
6.5.2.2.4 Datagram Routing............................
85
6.5.2.2.5 Flow and Congestion Control.................
89
6.5.2.3 Virtual Transport Connection Service (VTCS). 90
6.5.2.3.1 VTCS Standards..............................
91
6.5.2.4 Data Link Environment....................... 92
6.6 Terminal Access Software ................... 93
6.6.1 Introduction ............................... 93
6.6.2 Line Handlers .............................. 95
6.6.2.1 Asynchronous Start/Stop Protocols .......... 95
6.6.2.2 BSC Protocol ............................... 96
6.6.2.3 SDLC Protocol .............................. 97
6.6.2.4 HDLC Protocol .............................. 97
6.6.3 Device Handlers ............................ 97
6.6.3.1 TTY Support................................. 98
6.6.3.2 VDU Support ................................ 102
6.6.3.2.1 IBM 3270 ................................... 102
6.6.3.3 Batch Device Support........................ 103
6.6.3.3.1 IBM 2780 and 3780 BSC ...................... 103
6.6.3.3.2 IBM S3 HASP Work Station BSC ............... 104
6.6.3.3.4 Univac NTR Work Station .................... 104
6.6.4 Emulators .................................. 107
6.6.4.1 IBM 3270 BSC ............................... 107
6.6.4.2 IBM 2780 & 3780 BSC ........................ 113
6.6.4.3 HASP Work Station BSC ...................... 116
6.6.4.4 IBM SNA PU.T1 .............................. 120A
6.6.4.5 IBM SNA PU.T2 .............................. 120B
6.6.4.6 Transparent Interface ...................... 120B
6.6.4.7 Terminal Interface Support Summary ......... 120D
6.6.5 External resources Manager ................. 120D
6.6.6 Node Logical Unit Services ................. 120E
6.6.7 Node Session Manager ....................... 120E
6.6.8 Connection and Allocation Services ......... 120F
6.6.9 Configuration Manager and Status Reporter... 120F
6.7 Host Access Software........................ 121
6.7.1 Introduction................................ 121
6.7.2 IBM Host Interface.......................... 122
6.7.2.1 Mapping ACDN onto SNA....................... 122
6.7.2.1.1 ACDN Control Areas.......................... 123
6.7.2.1.1.1 NCC Control Area........................ 123
6.7.2.1.1.2 Host Interface Control Area............. 124
6.7.2.1.1.3 Node Control Area....................... 124
6.7.2.1.1.4 Participant Control Area................ 125
6.7.2.1.1.5 Attacvhment Control Area................ 125
6.7.2.1.1.6 ACDN Area............................... 125
6.7.2.1.2 SNA Control Concepts........................ 126
6.7.2.1.2.1 Domain.................................. 126
6.7.2.1.2.2 PU.T4 Subarea........................... 127
6.7.2.1.2 Mapping of Resources Controlled by ACDN..... 128
6.7.2.1.4 Host Connections............................ 130
6.7.2.1.5 Mapping of Resources Controlled by Hosts.... 133
6.7.2.2 SNA Protocols and Supporting
Software Components......................... 134
6.7.2.2.1 SNA Data Units.............................. 138
6.7.2.2.2 The SSCP - PU.T4............................ 145
6.7.2.2.2.1 IBM Channel Interface................... 149
6.7.2.2.3.1 Error Recovery in Cross Domain Sessions. 161
6.7.2.2.4 Cross Domain LU-LU Sessions................. 162
6.7.2.2.5 SSCP-PU and LU Control Sessions............. 170
6.7.2.3 Network Configuration in the Host........... 175
6.7.2.3.1 VTAM only Definitions for ACDN
Participant Hosts APPL Major Node
Definitions................................. 177
6.7.2.3.2 ACDN Participant Host's Definitions
Applying to Both VTAMs and NCPs............. 178
6.7.2.4 Future Development.......................... 181
6.7.3 UNIVAC HOST INTERFACE....................... 195
6.7.3.1 Distributed Systems Architecture............ 195
6.7.3.2 Protocols and Software for new Univac hosts. 205
6.7.3.3 The ACDN interface to VIA................... 269
6.7.4 HONEYWELL HOST INTERFACE.................... 290
6.7.4.1 Distributed Systems Architecture (DSA)...... 290
6.7.4.1.1 Introduction ............................... 290
6.7.4.1.2 DSA layers and Protocols.................... 290
6.7.4.1.3 Network Components.......................... 293
6.7.4.2 Implementation of DSA....................... 293
6.7.4.2.1 Implementation in the DPS8/70............... 293
6.7.4.2.2 Implementation in the Network .............. 296
6.7.4.3 Mapping ACDN onto DSA....................... 298
6.7.4.3.1 Functional overviews........................ 298
6.7.4.3.2 Datanet & Connection to HAS................. 298
6.7.4.3.3 DIA channel connection to HAS............... 298
6.8 Internal Network Access Software............ 302
6.8.1 ACDN Interfaces............................. 304
6.8.2 Network Interface........................... 304
6.8.3 Modules of the Internal Network Access S/W.. 306
6.8.3.1 The ICC Module.............................. 306
6.9 External Network Access
Software, ENAS.............................. 307
6.9.1 ARINC and SITA Procedure.................... 307
6.9.2 CHT and similar Connections................. 308
6.9.3 Public Packet Switching Data Network
Access...................................... 312
6.9.4 Interpreter for Standard Message Text (SMT). 312
6.10 Network Control Software Package............ 313
6.10.1 NCS software architecture................... 313
6.10.1.1 NCS network communication................... 315
6.10.1.2 Network tables and files.................... 315
6.10.1.3 Routing principles.......................... 316
6.10.2 Major NCS components........................ 316
6.10.2.1 Network operator services................... 317
6.10.2.2 System configuration services............... 318
6.10.2.3 Network access services..................... 319
6.10.2.4 Session services............................ 319
6.10.2.5 User services............................... 320
6.10.2.6 Alarm and event processor................... 320
6.10.2.7 Network test services....................... 321
6.10.2.8 Statistics support services................. 321
6.10.2.8.1 Statistics Management and Collection........ 322
6.10.2.8.2 Statistics Report Generation................ 322
6.10.2.9 Network recovery services................... 322
6.11 Network Management Host Software............ 324
6.11.1 NMH Interfaces and Functional Overview...... 324
6.11.2 Software Development and Maintenance Functions 324a
6.11.3 Maintenance of the Data Base................ 325
6.11.4 Data Base Management System User Groups..... 326
6.11.5 Data Base Management Tools.................. 327
6.11.6 Report Generation........................... 330
6.11.7 Network Modelling Software and Support for
Automatic Network Tests..................... 331
6.11.8 Network Testing by Means of ATES............ 332
6.12 Electronic Mail Software Package............ 333
6.12.1 Interfaces to the EMH....................... 334
6.12.2 Functional Description of the EMH .......... 334
6.12.2.1 TDP TRAFFIC HANDLING SUBSYSTEM.............. 337
6.12.2.2 Message Analysis Subsystem.................. 337
6.12.2.3 Message Output Subsystem.................... 338
6.12.2.4 Message Entry Subsystem (MES)............... 338
6.12.2.5 Message Distribution Subsystem.............. 339
6.12.2.6 Storage and Retrieval Subsystem............. 339
6.12.2.7 Supervisory Functions Subsystem............. 340
6.12.2.8 Electronic Mail Service Subsystem
and Standard Software....................... 340…86…1
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