ITU-T E.161.1-2008 Guidelines to select Emergency Number for public telecommunications networks Study Group 2

pdf标准 ITU-T E.161.1-2008 Guidelines to select Emergency Number for public telecommunications networks Study Group 2

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I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n ITU-T U n i o n E.161.1 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (09/2008) SERIES E: OVERALL NETWORK OPERATION, TELEPHONE SERVICE, SERVICE OPERATION AND HUMAN FACTORS International operation – Numbering plan of the international telephone service Guidelines to select Emergency Number for public telecommunications networks Recommendation ITU-T E.161.1 ITU-T E-SERIES RECOMMENDATIONS OVERALL NETWORK OPERATION, TELEPHONE SERVICE, SERVICE OPERATION AND HUMAN FACTORS INTERNATIONAL OPERATION Definitions General provisions concerning Administrations General provisions concerning users Operation of international telephone services Numbering plan of the international telephone service International routing plan Tones in national signalling systems Numbering plan of the international telephone service Maritime mobile service and public land mobile service OPERATIONAL PROVISIONS RELATING TO CHARGING AND ACCOUNTING IN THE INTERNATIONAL TELEPHONE SERVICE Charging in the international telephone service Measuring and recording call durations for accounting purposes UTILIZATION OF THE INTERNATIONAL TELEPHONE NETWORK FOR NONTELEPHONY APPLICATIONS General Phototelegraphy ISDN PROVISIONS CONCERNING USERS INTERNATIONAL ROUTING PLAN NETWORK MANAGEMENT International service statistics International network management Checking the quality of the international telephone service TRAFFIC ENGINEERING Measurement and recording of traffic Forecasting of traffic Determination of the number of circuits in manual operation Determination of the number of circuits in automatic and semi-automatic operation Grade of service Definitions Traffic engineering for IP-networks ISDN traffic engineering Mobile network traffic engineering QUALITY OF TELECOMMUNICATION SERVICES: CONCEPTS, MODELS, OBJECTIVES AND DEPENDABILITY PLANNING Terms and definitions related to the quality of telecommunication services Models for telecommunication services Objectives for quality of service and related concepts of telecommunication services Use of quality of service objectives for planning of telecommunication networks Field data collection and evaluation on the performance of equipment, networks and services OTHER For further details, please refer to the list of ITU-T Recommendations. E.100–E.103 E.104–E.119 E.120–E.139 E.140–E.159 E.160–E.169 E.170–E.179 E.180–E.189 E.190–E.199 E.200–E.229 E.230–E.249 E.260–E.269 E.300–E.319 E.320–E.329 E.330–E.349 E.350–E.399 E.400–E.404 E.405–E.419 E.420–E.489 E.490–E.505 E.506–E.509 E.510–E.519 E.520–E.539 E.540–E.599 E.600–E.649 E.650–E.699 E.700–E.749 E.750–E.799 E.800–E.809 E.810–E.844 E.845–E.859 E.860–E.879 E.880–E.899 E.900–E.999 Recommendation ITU-T E.161.1 Guidelines to select Emergency Number for public telecommunications networks Summary The purpose of Recommendation ITU-T E.161.1 is to provide guidance to help Member States who are in the process of selecting a single emergency number for the first time, or selecting a secondary alternative emergency number for public telecommunications networks. Source Recommendation ITU-T E.161.1 was approved on 23 September 2008 by ITU-T Study Group 2 (2005-2008) under the WTSA Resolution 1 procedure. Rec. ITU-T E.161.1 (09/2008) i FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T 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 World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall within ITU-T's purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression "Administration" is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure e.g., interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words "shall" or some other obligatory language such as "must" and the negative equivalents are used to express requirements. The use

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