1、CCITT RECNN*E-810 92 m Y862591 0576535 O62 m INTERNATIONAL TELECOMMUNICATION UNION WITT TH E INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE TELEPHONE NETWORK AND ISDN QUALITY OF SERVICE NETWORK MANAGEMENT AND TRAFFIC ENGINEERING E.81 O (1 0/92) FRAMEWORK OF THE RECOMMENDATIONS ON THE S
2、ERVEABILITY PERFORMANCE AND SERVICE INTEGRITY FOR TELECOMMUNICATION SERVICES Recommendation E.81 O The CCITT (the International Telegraph aid Telephone Consultative Committee) is a pennanent organ of the Internationai Telecoinmunication Union (ITU). CCITT is responsible for studying technical, opera
3、ting and tariff questions aid 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 aid approves Recoinmendations prepared by its Study Groups. The approval of
4、 Recommendations by the members of CCITT between Plenary Assemblies is covered by the procedure laid down in CCITT Resolution No. 2 (Melbourne, 1988). procedure on the 30th of October 1992. Recoininendation E.810 was prepared by Study Group II and was approved under the Resolution No. 2 CCIT NOTE In
5、 this Recommendation, the expression “Administration” is used for conciseness to indicate both a telecominuiiicatioii administration aid a recognized private operating agency. O ITU 1993 All rights reserved. No part of this publication may be reproduced or utilized in any form or by .my means, elect
6、ronic or inechaiical, including photocopying and microfilm, without permission in writing from the ITU. _ _- - - CCITT RECMN*E.BLO 92 4862591 0576537 935 W Recommendation E.810 FRAMEWORK OF THE RECOMMENDATIONS ON THE SERVEABILITY PERFORMANCE AND SERVICE INTEGRITY FOR TELECOMMUNICATION SERVICES (1992
7、) Introduction This Recoinineiidatiou is a guidance on a set of closely related Recommendations concerned with the serveability performance of telecciininuiiication services, as listed below. The CCITT, 10 nsici riqy (a) tiitit tliere is ;i desire to establish overall objectives for the Qudity of Se
8、rvice as perceived by the users; (b) tliat such ob-iectives ciin then be used as a basis for the design, planning, operation aid maintenance of (c) that Recoinineiidaticiii E.800 contains terms and detinitiotis for the Quality of Service, including (il) that scrveability pcrformaiice requires the co
9、nsideration of several measures; (c) that calls models are needed in order to describe the serve-ability performance showing, for each tclecciininuiiicatioii service coiisidered, the correspondence between the different call phrises ,and the relevait incasures; tclecoinrnutiicatioii iietworks atid t
10、heir component parts; scrvc;ihility pcrforinarice and service integrity; (D that reference models are needed to allocate aid evaluate serveability aid service integrity measures; (g) that service specific success criteria are needed in order to quantify the measures and to determine whether or not a
11、 given call phase is successfully performed, rt.cwmmrnls evaluate their networks. that the following Recommendations shall be used by Administrations to design, plan, operate, mahtain aid EA20 - Call models for serveability and service integrity performance; EX30 - Models for the specification, eval
12、uation and allocation of serveability and service integrity; E.845 - Connection accessibility objective for the international telephone service; E.84 - Accessibility for 64 kbit/s circuit-switched international end-to-end ISDN connection types; E.850 - Connection retainability objective for the inte
13、rnational telephone service. Note - Refer also to the draft Recornmendation being studied under Question 20DI. Figure lE.8 10 shows the relationships among the serveability and service integrity Recommen&tions. Ternis in this Recorninendation are used in the sense of their defiuitiou giveu iii Recoi
14、miiendatioii E.800. Recommandation E.810 (10B2) I . CCITT RECMN*E-BLO 72 W 4862571 0576538 871 W Rec. E.800 Quality of service and dependability vocabulary I I Rec. E.820 Call models for serveability and service integrity performance I I il Ir v * v I I . ISDNSWVWS 1 I I., isservices I I .I. v ISDNs
15、ervic . I F . Telex I F . + Telex I F . v Telex E.845 Telephony E.850 Telephony E.855 Telephony Connection accessibility Connection retainability Connection integrity objective for the international telephone seivice objective for the international telephone service objective for the international t
16、elephone service I I 1 I I II I Telex ISDN services Telephony E.830 Telephony Models for the specification, evaluation and alMi of serveability and service integrity - Connection retention Field data cdlection and evaluation on the performance of equipment, networks TOM387083 FIGURE 1/E.810 Relationship among serveability and service integrity recommendations 2 Recommandation E.810 (i 0/92)
