ISO/IEC INTERNATIONAL STANDARD 9041-1 Second edition 1997-06-15 Information technology Open Systems Interconnection Virtual Terminal Basic Class Protocol -- Part 1: Specification Technologies de I'information - Interconnexion de systemes ouverts (Osl)-Protocoledeclassedebase determinal virtuel Partie 1: Spécification IEC TSo Reference number ISO/IEC 9041-1:1997(E) Copyright Intermational Organization for Standardization rmitted without license from IHS Not for Resale ISO/IEC 9041-1:1997(E) Contents 1 Scope 2 Normative references 3 Definitions... 3.1 Global OSI definitions . 2 3.2 Association Control Service Element definitions. 2 3.3 Presentation Layer Service Element definitions . . . . 2 3.4VirtualTeminalServicedefi 2 3.5 Virtual Terminal Protocol definitions . 2 4 Abbreviations. 3 4.1VirtualTerminalServiceabbreviations 3 4.2 Miscellaneous . 3 4.3 VT Protocol elements 3 5.1 Virtual Terminat Service summary 3 5.2 Model... 6 5.3 Service assumed from the Presentation Layer 6 5.4 Service assumed from ACSE 6 5.5 Functions of the VT Protocol. . 5.6 Protocol Functional Units. 8 5.7 Modes of Operation. 8 5.8 Access Control 8 6 Protocol elements 6.1 APQ (VT-P-ABORT).. . 9 6.2 ASQ (VT-ASSOCIATE-REQ) 9 6.3 ASR (VT-ASSOCIATE-RESP) 9 6.4 AUQ (VT-U-ABORT) . 10 6.5 BKQ (VT-BREAK-REQ). 10 6.6 BKR (VT-BREAK-RESP). 10 6.7DAQ(VT-ACK-RECEIPT) 10 C ISO/IEC 1997 Al rights reserved. Unless otherwise specified, no partof this publication may be reproduced or utilized in any fom or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. ISO/IEC Copyright Ofice · Case Postale 56 · CH-1211 Geneve 20 · Switzerland Printed in Switzertand i Copyright Intemational Organization for Standardization ted without license from IHS Not for Resale @ISO/IEC ISO/IEC 9041-1:1997(E) 6.8 DLQ (VT-DELIVER) .10 6.9 ENQ(VT-END-NEG-REQ).. 6.10 ENR (VT-END-NEG-RESP) 6.11 GTQ (VT-GIVE-TOKEN) 10 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). 11 6.17 NOQ(VT-NEG-OFFER) 11 6.18 RLQ (VT-RELEASE-REQ) .11 6.19 RLR (VT-RELEASE-RE 6.20 RTQ (VT-REQUEST-T 11 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). 12 6.26 EXQ (VT-P-EXCEPTION-REQ) 12 6.27 EXR (VT-P-EXCEPTION-RESP) .12 7 Procedures . 12 8 Primary procedures .. 13 8.1 Association Establishment 8.2 Agreed Release....... 8.3 Unconditional Termination . . . . 13 8.4Negotiation .13 8.5DataTransfer.. .13 8.6 Delivery Control. . 8.7 Token Management 8.8 Break..... .14 9 Switch Profile procedures . 21 9.1 Association Establishment 9.2 Agreed Release...... 9.3 Unconditional Termination . 21 9.4 Negotiation .. .21 9.5DataTransfer.. 9.6 Delivery Control. . . 9.7 Token Management 9.8 Break and Exception. . . ...22 10 Multipie interaction Negotiation procedures . 10.1 Association Establishment ..22 10.2 Agreed Release. ...... 10.3 Unconditional Termination .. . 10.4 Negotiation . ..23 10.5 Data Transfer . 10.6 Delivery Control. . . 10.7 Token Management 10.8 Break and Exception. . . .24 ii Copyright Intermational Organization for Standardization Not for Resale CISO/IEC ISO/EC9041-1:1997(E) 11 Mapping of protocol elements . 24 11.1 Mapping to Association Control Services 25 11.2 Use of Presentation Services 27 12 Protocol data unit structure . .28 28 12.2 General definitions. 34 12.3ConceptualDataStoredefinitions 40 12.4 Control, Signal and Status definitions . 44 12.5 Device Object definitions. . 47 13 Conformance . 13.1 Dynamic conformance requirements. 50 13.2 Static conformance requirements . 50 13.3 Protocol Implementation Conformance Statement (PICS) . . . . . . . 50 Annex A State Tables .51 A.1 General ..... 51 A.2 Parameters, VTPM rights and variables. 51 A.3 Conventions for use of state tables 53 A.4 Actions to be taken by the VTPM. 53 Annex B Defined OBJECT IDENTIFIER name