1、 ATIS-0300072 NORTH AMERICAN NUMBERING PLAN (NANP) EXPANSION REFERENCE DOCUMENT August 17, 2002 Copyright 2002 by the Alliance for Telecommunications Industry Solutions, Inc. All rights reserved. The INC NANP Expansion Reference Document dated August 17, 2002 (former document number INC 02-0729-30)
2、is copyrighted, published and distributed by ATIS on behalf of the Industry Numbering Committee (INC). Except as expressly permitted, no part of this publication may be reproduced or distributed in any form, including electronic media or otherwise, without the prior express written permission of ATI
3、S. Participants in the INC and other parties are hereby authorized to reproduce this document and distribute it within their own business organizations for business purposes, provided that this notice continues to appear in the reproduced documentation. Resale is prohibited. For ordering information
4、, please contact: ATIS 1200 G Street N.W., Suite 500 Washington, DC 20005 (202) 628-6380 incatis.org A complete listing of INC Documents is available on the ATIS Web Site at: http:/www.atis.org/inc/docs/.asp ATIS is the leading technical planning and standards development organization committed to t
5、he rapid development of global, market-driven standards for the information, entertainment and communications industry. More than 250 companies actively formulate standards in ATIS 18 Committees, covering issues including: IPTV, Service Oriented Networks, Energy Efficiency, IP-Based and Wireless Tec
6、hnologies, Quality of Service, and Billing and Operational Support. In addition, numerous Incubators, Focus and Exploratory Groups address emerging industry priorities including “Green”, IP Downloadable Security, Next Generation Carrier Interconnect, IPv6 and Convergence. ATIS is the North American
7、Organizational Partner for the 3rd Generation Partnership Project (3GPP), a member and major U.S. contributor to the International Telecommunication Union (ITU) Radio and Telecommunications Sectors, and a member of the Inter-American Telecommunication Commission (CITEL). For more information please
8、visit . - The Industry Numbering Committee (INC) provides an open forum to address and resolve industry-wide issues associated with planning, administration, allocation, assignment and use of North American Numbering Plan (NANP) numbering resources within the NANP area. This document is maintained u
9、nder the direction of ATIS and the INC. Suggestions for improvement of this document are welcome. They should be sent to the Alliance for Telecommunications Industry Solutions, INC Staff, 1200 G Street NW, Suite 500, Washington, DC 20005. All changes to this document shall be made through the INC is
10、sue resolution process and adopted by the INC as set forth in the ATIS Operating Procedures. - Notice of Disclaimer ii) portability with pooling will at a minimum cover the top one hundred MSAs in the U.S.; iii) portability and pooling are restricted to a rate center; iv) portability will apply to a
11、ll geographic numbers used in a wireline/wireless environment; v) location portability will be supported throughout any given portability pooling area and will not be restricted to rate centers; and vi) While service provider portability refers to the ability of end users to retain the same telephon
12、e number as they change from one service provider to another, service portability refers to the ability of users of telecommunications services to retain existing telecommunications numbers without impairment of quality, reliability or convenience when switching from one telecommunications service t
13、o another service (i.e., POTS to ISDN) provided by the same telecommunications carrier. r. The N restriction (i.e., 2 through 9) will be removed from the existing D digit in the Central Office (CO) code field coincident with the implementation of the NANP expansion plan s. The conditions defined in
14、the INC Uniform Dialing Plan will be implemented before the NANP expansion plan is implemented. 3.0 NANP Functionality The NANP supports the provision of a basic set of functionalities which are described in Section 3.1. The key function provided by the NANP number set itself is user access and, use
15、r derived information relevant to that access (e.g., a 213 number is located in Los Angeles, an 800 call is “free“, etc.). The ability to use the NANP number to derive the specific information required to perform traditional functions is a product of systematic intelligence provided in the networks
16、infrastructure. In short, the numbering plan is an enabler, and, not a direct provider of most network functions. However, some of the networks most fundamental capabilities are supported in this manner (i.e., rating, routing, billing, etc.). Therefore, when considering the merits of existing and fu
17、ture NANP based “functionalities,“ one must consider the impact on existing or new network infrastructure (i.e., switching, billing systems, etc.) to support such functionality. 3.1 Existing Functions - The existing NANP supports the following functionalities: Terminal Identification - A NANP number
18、 uniquely identifies the network service access point/interface for each PSTN terminal in terms of identifying the local switch and the specific switch facilities associated with that terminal. Personal Identification - When a NANP number is used for personal identification, it uniquely identifies a
19、n individual/ person. Call delivery/routing is controlled by a service profile management capability which directs/routes the calls to a terminating point (typically identified by another NANP number) chosen by the called party. Special Access Code (SAC) 500 is currently available for this type of a
20、pplication. Service Identification - Service identification using NANP numbers is the association between a number and a service. An example is that calls to 800 numbers are “toll-free“ to the calling party. Geographic Significance - For example, the assignment of NPA codes to a specific/discrete ge
21、ographic area allows callers to determine, and, associate a number with the called geographic location. Terminal and Personal Mobility - NANP numbers enable networks to identify mobile terminals and mobile subscribers (either those who are traced through the terminal roaming, or, personal mobility s
22、ervices PCS). Roaming - The current NANP enables wireless roaming. Rating/Billing Information (related to distance sensitivity) - For example, in the US every geographic NANP number is associated with a specific rate center. Rate centers provide geographic location information which is used by the n
23、etworks billing systems to derive the distance between the calling and called party that is used in calculating the cost of a call. Account Information - The NANP number is widely used by network operators to identify customers with their accounts. Once identified by the NANP number, customer accoun
24、t information such as equipment installed, discount plans, credit rating, etc. information is available. Routing Information (digit analysis, trunk group selection) - The network utilizes the dialed NANP number to determine how to route each call. Digit analysis of the NANP number is performed at ea
25、ch switching node in a calls path to determine the outgoing trunk group on which to route the call towards its final destination. Limited Service Provider/Network Identification - Within the ten-digit geographic NANP number, service provider/network identification is achieved through the assignment
26、of a number to a customer from a specific service providers pool of numbers (e.g., NXX codes in geographic NPAs, etc.) Calls to each customer are automatically routed to them via their service providers network. The calling customer is provided with no control over either the transit or a terminatin
27、g network by the NANP number. In non-geographic applications, NPA 456 was allocated to allow for both transit and terminating network selection on inbound international calls based solely on NANP digit analysis in the originating foreign country. This allocation was made specifically to overcome ser
28、vice provider/network identification shortcomings in the NANP. Internal Network Routing (0/1XX - NPAs) - Codes in the 0/1 XX range are not currently assignable as NPA codes in the NANP because the “0” and “1” are currently being used as prefixes.3As a result of this current restriction, codes in the
29、 0/1 XX format are being used extensively in the network to provide internal routing functionality (e.g., test codes for network maintenance, special routing codes for operator services, intra-network routing, etc.). 3.2 Additional Functions The current NANP was designed prior to the advent of new t
30、elecommunications network(s) needs, such as competition, mobility, portability, enhanced services, etc. These emerging needs are being accommodated by the existing NANP but not always in a graceful, effective, or efficient manner. Some examples of the above include: Service Provider identification/s
31、election is achieved using a carrier identification code (CIC) or a prefix dialing arrangement called a carrier access code (CAC)43See Annex A for a listing of existing prefixes. 4See Annex A The unceasing need to allocate CIC resources to achieve network/carrier identification is an indication of t
32、he need for this information by the network and its operators. Information (carrier identification) which is not readily derivable from the existing NANP numbers is therefore being provided ever increasingly through the use of CICs. A number of existing or proposed scenarios require one NANP number
33、for dialing and another one for routing. Among such scenarios are some number portability models, wireless roaming (Temporary Local Directory Numbers), and a number of wireline applications such as Remote Call Forwarding (RCF), toll-free (800), memory call, etc. The method used to route traffic to a
34、 non-geographic number (e.g., 800) does not contain NANP country specific identification within the dialed numbers. The trend toward international competition and global service offerings is not well accounted for in the NANP. The ongoing need to have “rate center“ based numbering assignments (i.e.,
35、 NXX/rate center) to satisfy billing and accounting needs is causing accelerated depletion of NANP resources in areas where local competition is being implemented. 3.3 Future Functions The future NANP must take into account the above and provide solutions where feasible. Some functions which may nee
36、d to be supported by tomorrows NANP include the following: Terminal Identification - A NANP number uniquely identifies the network service access point/interface for every PSTN terminal in terms of identifying the local switch and the specific switch facilities associated with that terminal. Persona
37、l Identification - When a NANP number is used for personal identification, it uniquely identifies an individual/person. Call delivery/routing is controlled by a service profile management capability which directs/routes the calls to a termination point (typically identified by another NANP number) c
38、hosen by the called party. SAC 500 is currently available for this type of application. Service Identification - Service identification using NANP numbers is the association between a number and a service. An example is that calls to 800 numbers are “toll-free“ to the calling party. Geographic Signi
39、ficance - For example, the assignment of NPA codes to a specific/discrete geographic area allows callers to determine, and, associate a number with the called geographic location. Terminal and Personal Mobility - NANP numbers enable networks to identify mobile terminals and mobile subscribers (eithe
40、r those who are traced through the terminal roaming, or, personal mobility services PCS). Rating/Billing Information (related to distance sensitivity) - For example, in the US every geographic NANP number is associated with a specific rate center. Rate centers provide geographic location information
41、 which is used by the networks billing systems to derive the distance between the calling and called party that is used in calculating the cost of a call. Account Information - The NANP number is widely used by network operators to identify customers with their accounts. Once identified by the NANP
42、number, customer account information such as equipment installed, discount plans, credit rating, etc. information is available. Routing Information (digit analysis, trunk group selection) - The network utilizes the dialed NANP number to determine how to route each call. Digit analysis of the NANP nu
43、mber is performed at a switching node in a calls path to determine the outgoing trunk group on which to route the call towards its final destination. International Inbound Routing Information - The international network (i.e., International Switching Centers - ICSs) utilizes the dialed NANP number,
44、preceded by the country code (1) to select the route for international traffic inbound into the NANP serving area. The NANP number should provide sufficient information to ensure that international originated calls can be routed directly to each sovereign entity/country within the NANP serving area.
45、 Number Portability - The expanded NANP must support number portability. Roaming/Mobility - The expanded NANP must support roaming and mobility functions. Inter-Country Routing/Services Requirements - Inter-country (intra-NANP and international) services may require the presence of specific informat
46、ion within NANP numbers to enable the direct routing required to support these services, and/or, to ensure compliance with national regulatory requirements for international traffic. Geographic Service Requirements - The NANP must continue to provide the functions required to support geographic serv
47、ices. Geographic services are generic and basically apply to Plain Ordinary Telephone Service (POTS). Non-Geographic Service Requirements - Non-geographic services numbering may generically be defined as any service/addressing plan that is not geographically based. However, the services supported by
48、 non-geographic numbering are unique today, and undefined for tomorrow. The future NANP must provide the functionality to support both existing and undefined new non-geographic services. Communication Assistance For Law Enforcement Act (CALEA) must be supported. Note: The current wireline and wireless nonstandard uses of NANP or NANP formatted resources will be impacted by NANP expansion options. 4.0 Assessment Criteria This section describes the criteria which have been established by the industry to assess the various NANP expansion options. It is recognized
