Numbering

• Recommendation E.106 (10/03) - International Emergency Preference Scheme for Disaster Relief Operations (IEPS)
  

  This Recommendation describes an international preference scheme for the use of public telecommunications by national autho​rities f​or emergency and disaster relief operations. The International Emergency Preference Scheme for Disaster Relief Operations (IEPS) is needed when there is a crisis situation causing an increased demand for telecommunications when use of the International Telephone Service may be restricted due to damage, reduced capacity, congestion or faults. In crisis situations there is a requirement for IEPS users of public telecommunications to have preferential treatment. In a crisis situation, there is a need for telecommunications among IEPS users of public telecommunications networks, such as the PSTN, ISDN or PLMN. These communications, which are regarded as essential, will be needed at the same time as the public will be attempting an increased number of calls during the period when the telecommunications networks may be restricted due to damage, congestion or faults. Many countries have, or are developing, national preference schemes to allow preferential treatment for such national traffic. However, it is important for an international support scheme during a crisis to allow communications between the IEPS users in one country and their correspondents in another. The International Emergency Preference Scheme for Disaster Relief Operations (IEPS) addresses this international support scheme. This preference scheme is only intended for use by IEPS users to be able to place calls with preference. Public emergency services on the other hand are intended for use by members of the general public to request services such as fire, police, and medical. They are often invoked by a short access code.

• Recommendation E.107 (02/07) - Interworking framework for National Implementation of Emergency Telecommunication Service (ETS)
  

  There is a potential for bilateral/multi-lateral agreement between cooperating countries/Administrations to link their respective Emergency Telecommunications Service (ETS) systems. This Recommendation provides guidance that will enable telecommunications between one ETS National Implementation (ENI) and another ENI, in addition to providing a description of ETS.

• Recommendation E.118 (05/06) - The international telecommunication charge card
  

  Telecommunication charge cards may be issued by Operating Agencies (OAs) to allow customers to use their card in connection with various international services at appropriate charges for each transaction and have the charges billed to their account in the country where the OA issued the charge card. Cards issued by OAs in accordance with this Recommendation conform to the appropriate ISO standards. This Recommendation has been revised to allow alternative, application-specific standards for IC cards where unique form factors require such alternatives.

• Recommendation E.156 (05/06) - Guidelines for ITU-T action on reported misuse of E.164 number resources
  

  This recommendation outlines the procedures that the TSB Director, should undertake when he has received reports of alleged misuse from members, including methods to address and counter any alleged misuse when such reports are brought to his attention.

• Recommendation E.156 Supplement (11/07) - Best Practice Guide on Countering Misuse
  

  This guide describes examples of misuse associated with E.164 numbering resources, together with descriptions of best practice to counter misuse. It was considered useful at the time it was written, and is intended to be used by Service providers and Regulators.

• Recommendation E.156 Suppl. 2 (06/11) - Possible Actions to counter misuse
  

  This supplement to E.156 identifies possible actions that are open to Member states and sector members when perceived and potential misuse of national E.164 numbers. The decision to publish this Supplement was taken by ITU T SG2 in order for guidance to be provided immediately. The intention is to further developthis Supplement with a detailed review of E.156, based on contributions received in the future. This supplement is a first steptowards identifying possible actions that might be taken to counter misuse in advance of discussions over the suitability of including such information within ITU-T E.156.

• Recommendation E.164 (02/05) - The international public telecommunication numbering plan
  

  This Recommendation provides the number structure and functionality for the four categories of numbers used for international public telecommunication: geographic areas, global services, Networks and Groups of Countries (GoC). For each of the categories, it details the components of the numbering structure and the digit analysis required to successfully route the calls. Annex A provides additional information on the structure and function of international public telecommunication numbers (hereafter referred to as "international E.164-numbers"). Annex B provides information on network identification, service parameters, calling/connected line identity, dialling procedures and addressing for geographic-based ISDN calls. Specific E.164-based applications, which differ in usage, are defined in separate Recommendations. In addition, this Recommendation describes a resource that enables the conduct of trials of potential new international public correspondence services. Specific E.164-based applications, which differ in usage, are defined in separate Recommendations, e.g., ITU-T Rec. E.168 – Application of E.164 numbering plan for UPT.

• Recommendation E.164 Supplement 2 (11/09) - Number Portability
  

  This Supplement defines standard terminology for a common understanding of the different aspects of number portability within an E.164 numbering scheme. It identifies numbering and addressing formats, call flows, network architectures and routing approaches that will provide alternative methods of implementation. It also proposes some examples of the administrative and operational processes required for the successful implementation of number portability.

• Recommendation E.190 (05/97) - Principles and responsibilities for the management, assignment and reclamation of E-Series international numbering resources
  

  This Recommendation contains the principles and responsibilities used in the management, assignment and reclamation of E-Series international numbering resources, e.g. Recommendations E.164 and E.212, under the auspices of the appropriate ITU-T Study Group.

• Recommendation E.212 (05/04) - The international identification plan for mobile terminals and mobile users
  

  A plan for unique international identification of mobile terminals and mobile users is required in order to enable these terminals and users to roam among public networks which offer mobility services. International Mobile Subscriber Identity (IMSI) is required so that a visited network can identify a roaming mobile terminal or mobile user, e.g. in order to query a subscriber's home network for subscription and billing information. Recommendation E.190 describes the general principles to be utilized in the assignment of ITU-T E-series international numbering resources. The procedures in this Recommendation, E.212, were developed in accordance with the principles contained in Recommendation E.190, and the statements contained in Recommendation E.190 take precedence over Recommendation E.212.

• Recommendation E.418 (05/03) - Performance measurements for IMT-2000 networks
  

  This Recommendation lays down a framework for supporting and defining the role of network management for IMT-2000 networks. IMT-2000 networks consist of various network elements and telecommunication technologies such as wireless and IP-based services. It is intended to give some guidance to identify data that is needed to check the status/performance of networks, especially IMT-2000 networks. Network management requires real-time monitoring of current network status and performance and the ability to take prompt action to control the performance and resources of the network when necessary. It should be noted that the complete range of network status and performance parameters are not necessary for the introduction of a network management capability. The scope of this KPI (Key Performance Indicators) Recommendation is to find areas where meaningful measures can be identified and correlated to the broader business objectives. Often measurements are taken because they are available not because they are meaningful. It is envisaged that the model in this Recommendation will assist carriers to direct operations areas to play a more key role in supporting the business. Network management requires real-time monitoring of current network status and performance and the ability to take prompt action to control the performance and resources of the network and services when necessary. It should be noted that the complete range of network status and performance parameters are not necessary for the introduction of a network management capability.

• Recommendation E.470 (02/05) – Operational considerations for QoS of voice over IP-based networks with PSTN-IP-PSTN architecture
  

  It is recognized that IP-based networks are increasingly used to deliver voice services to customers. These networks can impact the end-to-end service quality perceived by users. In order to maintain network performance required to deliver the desired service quality, several operational issues have to be considered. These issues include defining network performance measures and their objectives, Inter-Working issues between networks employing a variety of technologies, network measurement points, information to be exchanged between network operators, etc. ITU-T SG 13 on "Next-generation networks" has defined four key scenarios to be considered in their Ipframework document:

  • (Scenario a) A voice call from an Ipterminal connected to an IP-based network to a PSTN phone
    
  • (Scenario b) A voice call from PSTN phone to an Ipterminal connected to an IP-based network
    
  • (Scenario c) A voice call from a PSTN phone to another PSTN phone via an IP-based network
    
  • (Scenario d) A voice call from an Ipterminal connected to an IP-based network to another Ipterminal connected to an IP-based network via PSTN
    

  This Recommendation focuses only on Scenario c. In Scenario c both ends are PSTN (telephone) terminals and connected to PSTN at least as a local access (PSTN-IP-PSTN architecture).This network architecture is employed/or planned to be employed by many ROAs all over the world. In this case, the user may not be aware of the changes in the underlying technology and the QoS expectations may be expected to remain the same. This recommendation is for providing the general aspects of voice services in PSTN-IP-PSTN architecture, especially, for providing information whether or not the existing ITU-T recommendations could be applicable to PSTN-IP-PSTN voice architecture. Also, it covers the general impacts of Ipnetworks to voice services and provides an overview of the performance measurement/management scope.

• Recommendation E.480 (09/06) - Framework for Service Management Operational requirements Service Management
  

  Service Management (SM) is a new operational discipline being introduced to manage the increasing complexity associated with services built upfrom multiple interconnected networks delivering content from multiple sources. This Recommendation is intended to support and define the role of service management. It explains the service management principles and functions. The major part of this Recommendation provides a definition of service management and provides a framework for further analysis of the operational activities associated with service management.

• Recommendation E.751 (02/96) - Reference connections for traffic engineering of land mobile networks
  

  This Recommendation provides some reference architectures for existing and future public land mobile telecommunication networks (PLMN) and also provides a high level reference connection for Future Public Land Mobile Telecommunication Systems (FPLMTS) call/connection setup. The primary purpose of the reference connection is to provide a basis for developing traffic Grade of Service (GOS) Recommendations for networks supporting mobile services. The underlying FPLMTS call flow model in the reference connection should be used as a basis for more implementation-specific configurations for detailed performance analysis and GOS target setting.

• Recommendation E.760 (03/00) - Terminal mobility traffic modeling
  

  Terminal mobility traffic modeling for land terrestrial or satellite-based mobile systems (including cellular, cordless, paging and IMT-2000) presented in this Recommendation is intended to characterize the mobile user traffic demand associated with mobile services. This demand has significance for both the user and the signaling plane.

• Recommendation E.771 (10/96) - Network grade of service parameters and target values for circuit-switched land mobile services
  

  This Recommendation proposes network Grade of Service (GOS) parameters for current and evolving land mobile services. These parameters are defined, and their target values specified, assuming that the network and the network components are operating in their normal mode (i.e. are fully operational). Further, the parameters and their target values assume normal (as opposed to distress or emergency) traffic.

• Recommendation E.802 (02/07) - Framework for application of QoS parameters
  

  This document provides frameworks and methodologies for the identification of QoS criteria relevant to users and guidelines for conversion of these criteria into QoS parameters that can be used to evaluate the QoS of telecommunication services. Guidelines are also given to obtain user's QoS requirements and to prioritize the criteria or parameters. All these may be applied to services supported by the terrestrial and wireless legacy networks as well as services supported by the emerging Ipnetwork.

• Recommendation E.861 (02/06) - Defining Operations Competency metrics
  

  Improving network and service operations quality and efficiency to significantly reduce cost has become a business imperative for telecommunications service providers worldwide. However, one needs objective metrics by which to measure operations quality and efficiency and to facilitate comparison of them among service providers. This Recommendation describes a set of metrics called Total Operations Competency (TOC) metrics that are designed to cover a comprehensive view of network and services operations. Although each metric is useful on its own, metrics can also be combined to construct quantitative indicators for high-level business objectives. These indicators, in conjunction with cost functions for metrics improvements, can be used to formulate a rich set of optimization problems pertinent to operations.

• Recommendation F.116 (03/00) - Service features and operational provisions in IMT-2000
  

   

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