ISO/IEC INTERNATIONAL STANDARD 10588 First edition 1993-05-01 Information technology Use of X.25 Packet Layer Protocol in conjunction with X.21/X.21 bis to provide the OSl connection-mode Network Service Technologies de I'information- Utilisation du protocole X.25 de couche de paquet conjointement avec X.21/X.21 bis pour fournir le service de réseauOslenmodeconnexion IEC rso Reference number ISO/IEC10588:1993(E) Copyright Intermational Organization for Standardization Not for Resale ISO/IEC 10588 : 1993(E) Contents Page 1 3Definitions 2 Abbreviations 3 5 Overview... 4 6 Control of underlying connections ....... 5 7 Data link layer. 8 8 Packet layer 8 Annexes A X.30 Terminal Adaptors for ISDN. 10 B Bibliography 11 ISO/IEC.1993 All rights reserved. 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 Copyright intemational Organizatin for Standardization itted without license from IHS Not for Resale ISO/IEC10588 : 1993(E) Foreword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardiz- ation.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 technical activity.ISO and IEC technical committees collaborate in 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. 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 10588 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, in collaboration with the CCITT.The identical text is published as CCITT Recommendation X.613. ii CpyrhmatoaganizatioSandardization ermitted without license from IHS Not for Resale