ANSI ATIS 1000625-1993 Integrated Services Digital Network (ISDN) C Calling Line Identification Presentation and Restriction Supplementary Service.pdf

1、 AMERICAN NATIONAL STANDARD FOR TELECOMMUNICATIONS ATIS-1000625.1993(R2013) Integrated Services Digital Network (ISDN) Calling Line Identification Presentation and Restriction Supplementary Service As a leading technology and solutions development organization, ATIS brings together the top global IC

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5、can Telecommunication Commission (CITEL). For more information, visit. AMERICAN NATIONAL STANDARD Approval of an American National Standard requires review by ANSI that the requirements for due process, consensus, and other criteria for approval have been met by the standards developer. Consensus is

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11、l Standards Institute. Notice of Disclaimer and may include one redirecting subaddress that is associated with the original redirecting number; and one redirecting subaddress that is associated with the last redirecting number; or both. 3.11 Redirecting Subaddress (RS): A set of information other th

12、an RN that is associated with the redirecting party. The RS information may, for example, be encoded as IA5 characters, ASCII characters, or BCD digits. (RS information also includes a Type of Subaddress indicator and an Odd/Even indicator.) 3.12 service provider: This is a company, organization, bu

13、siness, etc. that sells, administers, maintains, charges for, etc. the service. The service provider may or may not be the provider of the network. 3.13 User-Provided Number (UPN): An ISDN number, supplied completely or partially by the calling user or the redirecting user, that is associated with t

14、he calling user or the redirecting user. The UPN may also be accompanied by a subaddress. 3.14 world numbering plan: A plan created by the International Telegraph and Telephone Consultative Committee (CCITT) that provides each telephone subscriber with a unique number. Each world telephone number co

15、nsists of a country code followed by the national number. By international agreement, the number of digits in the country code plus national number is limited to a total of 12 digits currently, with a recommendation to increase the maximum length to 15 digits at the end of 1996. (See CCITT Recommend

16、ations E.164 and E.165.) 3.15 World Zone 1 (WZ1): The group of countries in the World Numbering Plan that are identified by the single-digit country code “1”. World numbering Zone 1 is defined in CCITT Recommendation E.164, and includes the following countries: Canada; United States of America, incl

17、uding Puerto Rico and the Virgin Islands; Jamaica; Antigua and Barbuda; Cayman Islands; British Virgin Islands; Bermuda; Bahamas (Commonwealth of the); Dominican Republic; Grenada; Montserrat; St. Kitts; St. Lucia; and Saint Vincent and the Grenadines. The North American Numbering Plan is consistent

18、 with the World Numbering Plan and applies to World Zone 1. 4 Description of the CLIP and CLIR services from the users perspective This clause defines the CLIP and CLIR services in terms of procedures and other aspects that are visible to the user or users without regard to the means of implementati

19、on. It describes interworking with non-ISDNs and the interaction between the CLIP, CLIR and other ISDN supplementary services. This clause does not suggest how the required functions should be divided between customer-owned and public equipment. It does not address the protocol needed for implementi

20、ng these services in a standard way. It provides a prose description and a diagrammatic description of the CLIP and CLIR supplementary services in the form of a Specification and Description Language (SDL) Diagram. In case of conflict between the following text and the SDL, the text takes precedence

21、. Subclauses 4.1 and 4.2 contain the descriptions of CLIP and CLIR, respectively. 4.1 Description of CLIP 4.1.1 Description When the CLIP service is applicable and activated, the destination network provides the called party with the Calling Line Identification at call set-up on all incoming calls.

22、It is assumed that the originating network is capable of transmitting at least 15 digits of Calling Party Number digits. It is also assumed that the originating network is capable of transmitting a Calling Party Subaddress if provided by the calling party. For Network Validated Numbers, the calling

23、partys network should transmit enough numbering plan digits to allow other networks and users to identify the calling line. It is assumed that the redirecting network is capable of transmitting at least 15 digits of Redirecting Number digits. It is also assumed that the redirecting network is capabl

24、e of transmitting a redirecting subaddress, if provided by the redirecting party. For Network Validated Numbers, the redirecting network should transmit enough numbering plan digits to allow other networks and users to identify the redirecting party. Subaddress information is information other than

25、CPN or RN that identifies a particular party in a call. It is intended as end-user information, to be generated and processed by user equipment, and transferred by the network from one user to another without screening. Examples of the use of subaddress are: a) Extension number of a station behind a

26、 PBX; b) Identification of a specific terminal address; c) Convey all or part of an OSI Network Service Access Point (NSAP) address or N-Entity Title (see CCITTRecommendations X.213 and I.334). 4.1.2 Procedures 4.1.2.1 Provision/withdrawal The CLIP service may be provided on a subscription basis or

27、may be generally available. The CLIP service may be withdrawn at the request of the subscriber or by the service provider for administrative reasons. As a service provider option, CLIP may be offered with several subscription options. It is a service provider option as to how subscription options ar

28、e applied; (e.g., per ISDN Number and Bearer Service). Subscription options are summarized in table 1. 4.1.2.2 Normal procedures The normal procedures for CLIP for the originating and terminating sides of the network are described below and shown in figures 1 and 2, respectively as dynamic descripti

29、ons (Specification and Description Language (SDL). 4.1.2.2.1 Activation/deactivation Activation and deactivation of CLIP are achieved through subscription or are generally available. 4.1.2.2.2 Invocation and operation: Origi-nating network The originating user may provide Calling Line Identification

30、 to the originating network as part of basic call setup. If the calling party has not provided a Calling Party Number, a network default number shall be provided by the originating network. This network default number shall be marked as a “Network-Provided Number”. Where either the complete Calling

31、Party Number or part of the Calling Party Number is initially provided by the calling user, the originating network may optionally screen the number to check its validity. When screening applies, the network shall determine whether or not the digits provided by the calling user are valid. When scree

32、ning occurs in a public exchange, only 7- or 10-digit North American Numbering Plan numbers shall be treated as valid. If, as a result of screening, the user-provided number is determined to be valid, that number should be marked as a “User-Provided, Verified and Passed” number. If, as a result of s

33、creening, the user-provided number is determined to be invalid, that number should be marked as a “User-Provided, Verified and Failed” number. If the originating network does not screen the user-provided number, that number should be marked as a “User-Provided Not Screened” number. In the latter two

34、 cases (“User-Provided, Verified and Failed” and “User-Provided, Not Screened”) the originating network shall also provide the network default number for the calling user access, and mark that number as a “Network-Provided Number”. The service provider has the option to send one or two numbers. If t

35、he service provider elects not to screen UPNs, then the service provider should select the option to send two numbers. If the service provider option is to send only one number, the following treatment shall apply. If no UPN is available, the NPN alone shall be sent. If a valid UPN is available, tha

36、t UPN alone shall be sent. If an invalid UPN is available, or an un-screened UPN is available, the NPN alone shall be sent . If the service provider option is to send two numbers, the following treatment shall apply. If no UPN is available, the NPN alone shall be sent. If a valid UPN is available, t

37、hat UPN alone shall be sent. If an invalid UPN is available, or an unscreened UPN is available, the NPN shall be sent as the first number and that UPN shall be sent as the second number. In each case, indications shall be provided by the originating network to signify whether the Calling Party Numbe

38、r is “user provided” or “network provided”, and, if “user provided”, whether the number is “unscreened”, “verified and passed”, or “verified and failed”. Redirecting Number Information received from the redirecting user or the redirecting users network should be processed as part of the supplementar

39、y services that require call redirection. 4.1.2.2.3 Invocation and operation: Redi-recting network The redirecting user or the redirecting users network may provide Redirecting Number Information as part of the supplementary services that require call redirection. Rules for redirecting number screen

40、ing should be the same as the rules for Calling Party Number screening. Redirection services may also include restriction of Redirecting Number Information from presentation to the called user. Details on the provision and restriction of Redirecting Number Information may be defined as part of the s

41、upplementary services providing call redirection (e.g., Call Forward-ing, Call Transfer). 4.1.2.2.4 Invocation and operation: Termi-nating network The terminating network may receive the Calling Line Identification as part of basic call setup. This CLI may include CPNs, a CPS, RNs, and RSs. The deli

42、very treatment for the CPS and RS is given in the next subclause. One of the Calling Party Numbers shall be a Network Validated Number for the access of the calling party. The other Calling Party Number, if present, shall be an unvalidated User Provided Number from the access of the calling party. T

43、he called user, by the Calling Party Number Delivery (CPND) subscription option, may select either between the single- number delivery option or the two-number delivery option. If single-number delivery is specified, only the Network Validated Number shall be presented. If two-number delivery is spe

44、cified, and only one number is available, the Network Validated Number shall be presented. If two number delivery is specified, and two numbers are available, the Network Provided Number shall be presented and, additionally, the unscreened or invalid User Provided Number shall be presented. If Calli

45、ng Party Number Delivery is not subscribed (i.e., the “no delivery” option applies), no CPN value shall be presented. Indications shall be provided by the terminating network to signify whether each Calling Party Number is “user provided” or “network provided”, and, if “user provided”, whether the n

46、umber is “unscreened”, “verified and passed”, or “verified and failed”. The origin of the numbers can be determined, in cases where two numbers are presented, by the presence of the detailed screening indicators accompanying the numbers. The network shall deliver the Network Pro-vided Number as the

47、first number and the User Provided Number, either verified and failed or unscreened, as the second number. When Redirecting Numbers are received, each redirecting number (RN) shall be associated with separate occurrences of call redirection. When one redirecting number is received, that RN shall ide

48、ntify the number of the last party that redirected the call. When two redirecting numbers are received, the first RN shall identify the number of the first party that redirected the call, (i.e., the original called party), and the second RN shall identify the access of the last party that redirected

49、 the call. The called party, by Redirecting Number Identification Delivery (RNID) subscription option, may select either the “No delivery” option or the “Delivery” option. If “No delivery” is specified, no RN information shall be presented. If “Delivery” is specified, the following treatment shall apply. If no RN information is available, then no RN information shall be presented. If only one RN is available, then that RN alone shall be presented. If two RNs are available, both RNs shall be presented. The RN associated with the first redirecting party shall be presented fir