ITU-T E.701-1992 话务工程参考连续 REFERENCE CONNECTIONS FOR TRAFFIC ENGINEERING

pdf标准 ITU-T E.701-1992 话务工程参考连续 REFERENCE CONNECTIONS FOR TRAFFIC ENGINEERING

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ITU-T E.701-1992 话务工程参考连续 REFERENCE CONNECTIONS FOR TRAFFIC ENGINEERING 第 1 页 ITU-T E.701-1992 话务工程参考连续 REFERENCE CONNECTIONS FOR TRAFFIC ENGINEERING 第 2 页 ITU-T E.701-1992 话务工程参考连续 REFERENCE CONNECTIONS FOR TRAFFIC ENGINEERING 第 3 页 ITU-T E.701-1992 话务工程参考连续 REFERENCE CONNECTIONS FOR TRAFFIC ENGINEERING 第 4 页
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国外分类,ITU,ITU-T(电信标准分局),itu,话务,工程,参考,连续,reference,connections,for,traffic,engineering

INTERNATIONAL TELECOMMUNICATION UNION CCITT THE INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE TELEPHONE NETWORK AND ISDN QUALITY OF SERVICE, NETWORK MANAGEMENT AND TRAFFIC ENGINEERING REFERENCE CONNECTIONS FOR TRAFFIC ENGINEERING Recommendation E.701 E.701 (10/92) FOREWORD The CCITT (the International Telegraph and Telephone Consultative Committee) is a permanent organ of the International Telecommunication Union (ITU). CCITT is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The Plenary Assembly of CCITT which meets every four years, establishes the topics for study and approves Recommendations prepared by its Study Groups. The approval of Recommendations by the members of CCITT between Plenary Assemblies is covered by the procedure laid down in CCITT Resolution No. 2 (Melbourne, 1988). Recommendation E.701 was revised by Study Group II and was approved under the Resolution No. 2 procedure on the 30th October 1992. ___________________ CCITT NOTES 1) In this Recommendation, the expression “Administration” is used for conciseness to indicate both a telecommunication administration and a recognized private operating agency. 2) A list of abbreviations used in this Recommendation can be found in Annex A. © ITU 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 ITU. PGE BLANCHE Recommendation E.701 Recommendation E.701 REFERENCE CONNECTIONS FOR TRAFFIC ENGINEERING (revised 1992) 1 General The goal of this Recommendation is to give the E.700-Series Recommendations a base to define ISDN Grade of Service (GOS) and traffic parameters. In § 2, two reference connections are defined. Definition of other reference connections is for further study. 2 Reference connections 2.1 Reference connection for point-to-point circuit switched services See Figure 1/E.701. User B User A TE LE Rec. Q.931 Transit network LE S.S. No. 7 signalling network TE Rec. Q.931 T0203580-93 User A Originating user User B Terminating user TE Terminal equipment LE Local exchange Note 1 – The transit network may contain zero, one, or more transit exchanges, which may or may not be dedicated ISDN exchanges. Note 2 – The signalling network may contain zero, one, or more signalling transfer points. Note 3 – The topology of the signalling network may differ significantly from that of the transit network. FIGURE 1/E.701 Reference connection for point-to-point circuit switched services Recommendation E.701 (10/92) 1 2.2 Reference connection for point-to-point packet switched services See Figure 2/E.701. For more details, see Recommendation E.712. User A Transit network Rec. X.75 PH TA LE User B PH LE TA DTE DTE T0203590-93 Rec. Q.931 User A User B DTE TA LE PH Rec. Q.931 Originating user Terminating user Data terminal equipment Terminal adaptor Local exchange Packet handler Note 1 – The transit network may contain zero, one, or more transit exchanges. Note 2 – Current CCITT Recommendations support X.25 DTEs using X.31 TAs. Note 3 – The packet handler may be located outside the local exchange. FIGURE 2/E.701 Reference connection for point-to-point packet switched services ANNEX A (to Recommendation E.701) Alphabetical list of abbreviations used in this Recommendation DTE Data terminal equipment GOS Grade of service LE Local exchange PH Packet handler TA Terminal adaptor TE Terminal equipment 2 Recommendation E.701 (10/92)

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