BS ISO 9041-1:1990

1 Scope
2 Normative references
3 Definitions
3.1 Global OSI definitions
3.2 Association Control Service Element definitions
3.3 Presentation Layer Service Element definitions
3.4 Virtual Terminal Service definitions
3.5 Virtual Terminal Protocol definitions
4 Abbreviations
4.1 Virtual Terminal Service abbreviations
4.2 Miscellaneous
4.3 VT Protocol elements
5 Overview
5.1 Virtual Terminal Service summary
5.2 Model
5.3 Service assumed from the Presentation Layer
5.4 Service assumed from the ACSE
5.5 Functions of the VT Protocol
5.6 Protocol Functional Units
5.7 Modes of Operation
5.8 Access Control
6 Protocol elements
6.1 APQ (VT-P-ABORT)
6.2 ASQ (VT-ASSOCIATE-REQ)
6.3 ASR (VT-ASSOCIATE-RESP)
6.4 AUQ (VT-U-ABORT)
6.5 BKQ (VT-BREAK-REQ)
6.6 BKR (VT-BREAK-RESP)
6.7 DAQ (VT-ACK-RECEIPT)
6.8 DLQ (VT-DELIVER)
6.9 ENQ (VT-END-NEG-REQ)
6.10 ENR (VT-END-NEG-RESP)
6.11 GTQ (VT-GIVE-TOKEN)
6.12 HDQ (VT-HIGH-PRI-DATA)
6.13 NAQ (VT-NEG-ACCEPT)
6.14 NDQ (VT-DATA)
6.15 NIQ (VT-NEG-INVITE)
6.16 NJQ (VT-NEG-REJECT)
6.17 NOQ (VT-NEG-OFFER)
6.18 RLQ (VT-RELEASE-REQ)
6.19 RLR (VT-RELEASE-RESP)
6.20 RTQ (VT-REQUEST-TOKEN)
6.21 SNQ (VT-START-NEG-REQ)
6.22 SNR (VT-START-NEG-RESP)
6.23 SPQ (VT-SWITCH-PROFILE-REQ)
6.24 SPR (VT-SWITCH-PROFILE-RESP)
6.25 UDQ (VT-URGENT-DATA)
7 Procedures
8 Primary procedures
8.1 Association Establishment
8.2 Agreed Release
8.3 Unconditional Termination
8.4 Negotiation
8.5 Data Transfer
8.6 Delivery Control
8.7 Token Management
8.8 Break
9 Switch Profile Procedure
9.1 Association Establishment
9.2 Agreed Release
9.3 Unconditional Termination
9.4 Negotiation
9.5 Data Transfer
9.6 Delivery Control
9.7 Token Management
9.8 Break
10 Multiple Interaction Negotiation procedures
10.1 Association Establishment
10.2 Agreed Release
10.3 Unconditional Termination
10.4 Negotiation
10.5 Data Transfer
10.6 Delivery Control
10.7 Token Management
10.8 Break
11 Mapping of protocol elements
11.1 Mapping to Association Control Services
11.2 Use of Presentation Services
12 Protocol data unit structure
12.1 General format
12.2 General definitions
12.3 Conceptual Data Store definitions
12.4 Control, Signal and Status definitions
12.5 Device Object definitions
13 Conformance
13.1 Dynamic conformance requirements
13.2 Static conformance requirements
13.3 Protocol Implementation Conformance Statement
      (PICS)
Annex
A State Tables
A.1 General
A.2 Parameters, VTPM rights and variables
A.3 Conventions for use of state tables
A.4 Actions to be taken by the VTPM
B Defined OBJECT IDENTIFIER names

A set of procedures for the connection-oriented transfer of data, control and reference information between protocol machines which implement the functions of a provider of the basic class virtual terminal service.