ISO/IEC INTERNATIONAL STANDARD 8882-1 Second edition 1996-09-15 Information technology - Telecommunications and information exchange between systems X.25 DTE conformance testing Part 1: General principles Technologies de I'information -Télécommunications et échange d'information entre systemes-Essais de conformiteX.25DTE- Partie 1: Principes généraux IEC Reference number ISO/IEC 8882-1:1996(E) Copyright Intermational Organization for Standardization rovided by IHS mitted without license from IHS Not for Resale ISO/IEC 8882-1 : 1996(E) Foreword ISO (the International Organizationfor Standardization)and IEC(the International Electrotechnical Commission) form the specialized system for worldwide stan- dardization. National bodies that are members of ISO or IEC participate in the development of International Standards through technical committees established by the respective organization to deal with particular fields of mutual interest. Other international organizations. governmental and non-governmental. in liaison with ISO and IEC. also take part in the work. In the field of information technology, ISO and IEC have established a joint technical committee ISO/IEC JTC 1. Information technology. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75% of the national bodies casting a vote. International Standard ISO/IEC 8882-1 was prepared by ISO/IEC JTC 1 Suhcommittee 6. Telecommunications and information exchange between systems. This second edition cancels and replaces the first edition (ISO/IEC 8882-1:1993) of which it constitutes a technical revision. ISO/EC 8882 consists of the following parts, under the general title Infomation technology -Telecommunicationsand infomationerchange bew'een systems- X.25-DTE conformance testing: Pan I: General principles Par 2: Data link layer conformance test suite Pan 3: Packet layer conformance test suite ISO/IEC1996 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. ISO/IEC Copyright Office · Case postale 56 · CH-1211 Geneve 20 · Switzerland Printed in Switzerland I Organization for Standardization No reproduction or tetworkingpermitedwithout license fromHS Not for Resale @ISO/IEC ISO/IEC 8882-1 : 1996(E) Introduction ISO/IEC 8882 specifies a set of tests to evaluate Data Terminal Equipment (DTE) conformance to International Standards ISO/EC 7776 or ISO/IEC 8208. or hoth. ISO/IEC 7776 and ISO/IEC 8208 allow for a DTE to interface with a Data Circuit-Terminating Equipment (DCE) conforming, to CCITT Recommendation X.25 (1980. 1984. 1988) or to another DTE conforming to ISO/IEC 7776 or ISO/IEC 8208 or both. The implementations of ISO/IEC 7776 and ISO/IEC 8208 are tested independently. CCITT Recommendations X.25(1980). X.25(1984) and X.25(1988) are written from the perspective of a DCE and therefore do not explicitly specify the DTE operation.However.recommended operation of DTEs is included by implication because of the need to communicate with X.25 DCEs. Tests within ISO/IEC 8882-2 and ISO/IEC 8882-3 pertaining to X.25 (1980. 1984) are based on the DTE operational characteristics implied by CCITT X.25. There are no test cases within ISO/EC 8882-2 and ISO/IEC 8882-3 for the extra functions and facilities added in X.25(1988) This part of ISO/IEC 8882 specifies the framework in which the other parts of ISO/IEC 8882 may be understood and the principles to he applied. The notation used in ISO/EC 8882-2 and ISO/IEC 8882-3 is TTCN as defined in ISO/EC 9646-3. ISO/IEC 8882-2 presents the Data Link Layer aspects for evaluating conformance to ISO/IEC 7776 while ISO/IEC 8882-3 presents the Packet Layer aspects for evaluatingconformance toISO/IEC 8208 The conformance test