BS ISO/IEC 9041-1:1997

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 abbreviations
    5.2 Model
    5.3 Service assumed from the Presentation Layer
    5.4 Service assumed from ACSE
    5.5 Functions of the VT Protocol
    5.6 Protocol Functional Use
    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_ACCEPT)
    6.14 NDQ(VT_DATA)
    6.15 NIQ(VT_NEF_INVITE)
    6.16 NJQ(VT_NEG_REJECT)
    6.17 (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)
    6.26 EXQ (VT_P_EXCEPTION_REQ)
    6.27 EXR(VT_P_EXCEPTION_RESP)
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 and Exception
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 and Exception
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
Annex B Defined OBJECT IDENTIFIER names

Defines procedures for the connection-oriented transfer of data, control and reference information between protocol machines for implementation of the functions of a provider of the Basic Class Virtual Terminal Service.

This part of ISO/IEC9041 specifies: 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; the two modes in which those procedures operate; the structure of protocol elements used for the transfer of data and control Information and the mapping of these protocol elements onto ACSE and lower layer services; the means of negotiating the functional units to be used by the protocol machines and the parameters of the service; the structure and mapping of protocol elements used for the transfer of data and control information. The procedures are defined in terms of: the interactions between Virtual Terminal Protocol Machines through the exchange of Virtual Terminal protocol elements; the Interactions between a Virtual Terminal Protocol Machine and the Virtual Terminal service user in the same system through the exchange of Virtual Terminal service primitives; the interactions between a Virtual Terminal Protocol Machine and the ACSE and Presentation Service providers through the exchange of service primitives. This part of ISO/IEC9041 also specifies conformance requirements (see clause13) for systems implementing these procedures. It does not contain tests which can be used to demonstrate this conformance. These procedures are applicable to instances of communication between systems that support the Basic Class Virtual Terminal Service in the Application Layer of the Reference Model for Open Systems Interconnection and which wish to interconnect in an open systems environment.