1、 ATIS-0300077 ATIS Standard on - 555 TECHNICAL SERVICE INTERCONNECTION AGREEMENTS As a leading technology and solutions development organization, the Alliance for Telecommunications Industry Solutions (ATIS) brings together the top global ICT companies to advance the industrys most pressing business
2、 priorities. ATIS nearly 200 member companies are currently working to address the All-IP transition, network functions virtualization, big data analytics, cloud services, device solutions, emergency services, M2M, cyber security, network evolution, quality of service, billing support, operations, a
3、nd much more. These priorities follow a fast-track development lifecycle from design and innovation through standards, specifications, requirements, business use cases, software toolkits, open source solutions, and interoperability testing. ATIS is accredited by the American National Standards Insti
4、tute (ANSI). The organization is the North American Organizational Partner for the 3rd Generation Partnership Project (3GPP), a founding Partner of the oneM2M global initiative, a member of and major U.S. contributor to the International Telecommunication Union (ITU), as well as a member of the Inte
5、r-American Telecommunication Commission (CITEL). For more information, visit www.atis.org. Notice of Disclaimer the POP of the carrier presubscribed to the calling line (the “PIC”)5 a termination within the local network. When multiple exchange providers exist in local calling areas, the call could
6、be routed to an interconnection point of another local service provider by mutual agreement of the affected parties. The network capability described above can support the routing of calls dialed with “555” numbers as both an exchange access service as well as a local exchange service. 3.5 Signaling
7、 Arrangements Signaling could be provided in the form of Multi-Frequency (MF) and/or Signaling System 7 (SS7). These Signaling types can be utilized for the following applications; exchange service, operator services, access services, etc. (See Section 3 and Figure 3-1). Potential features and inter
8、face options for the signaling interfaces are summarized in Section 3.3, Table 1. Calls routed to either an interexchange carrier or to a carrier designated by the 555 number assignee may require that the originating network provide information needed for billing and routing to the intermediate carr
9、ier who will then provide the same information to the terminating network.64 Technical Service Interconnection Architectures This section describes access and exchange service architectures that could be used for 555 services. The service arrangements are categorized based upon the following network
10、 functions: 1. translations of the dialed number 2. the routing of the call 3. the type of signaling _ 5This alternative applies to 10 digit dialed 555 numbers. 6Information that the terminating network may need includes the Trunk Class Mark, or ANI II digits, the ANI or billing number, the called n
11、umber or destination number and the transport carrier or presubscribed carrier information. iiATIS-0300077 These functions and their relationships are illustrated in Figure 3-1. The translation, routing, billing, blocking, and signaling characteristics are summarized in Section 3.3, Table 1. 4.1 Tra
12、nslations, Routing and Signaling Examples Using Figure 3-1 as a reference, consider a local service example in which a customer dials a seven digit 555 number. The originating network could perform a seven digit analysis and translation of the 555 number and determines that the call should be comple
13、ted within the same originating network. (See S1, S2 or S3 in Figure 3-1) The call would be delivered to the location of the 555 number holder on an intraLATA basis to a line side termination. (See S2 in Figure 3-1) In the intermediate example, two potential situations could exist. In the first case
14、, a caller dials a 10 digit 555 number with an NPA in a foreign LATA (Local Access Transport Area). The originating switch could route the call to the interexchange carrier identified by the PIC of the originating subscribers line using a FG D (Feature Group D) interface (S-1). The PICd interexchang
15、e carrier could then analyze and translate the 555 number and route the call appropriately. In the second case, a caller could dial either a 7 or 10 digit 555 number. The originating switch could perform digit analysis and translations of the 555 line number to determine the designated carrier (S1 i
16、n Figure 3-1) selected by the 555 assignee and route the call to that designated carrier. The designated carrier could then perform digit analysis and translate the 555 number and route the call appropriately. In a terminating example, a caller dials a 10 digit 555 number that is intended for a fore
17、ign NPA. The originating switch could route the call to the interexchange carrier identified by the PIC of the subscribers line (S1 in Figure 3-1) using FG D interface. Thus far, this example is originating translation. Based upon the 10 digit dialed number, the interexchange carrier could terminate
18、 the call to the LEC (Local Exchange Carrier) tandem specified in the LERG. (This is the terminating network in Figure 3-1). The terminating LEC tandem could translate the seven digit 555 line number to a number in the terminating LATA to an exchange trunk interface (S2). Thus, translations would ha
19、ve been performed in the terminating LATA. iiATIS-0300077 OriginatingNetworkPICDesignatedCarrier555AssigneeTerminatingNetwork*Translated:Route to:Requires terminating arrangementS3S2S1S1S3S2S3S2S3S2S1S1 = e.g. Feature Group D, Operator Services SwitchS2 = e.g. Line or trunk side interfaceS3 = negoti
20、ated signaling and interface* Designated carrier could be a 555 assignee* 555 assignee could be a common carrierFigure 3-1iiATIS-0300077 3.2 Potential Architectural Arrangements The translations, routing and signaling variations from Figure 3-1 are further illustrated in Figure 3-2. The left side of
21、 Figure 3-2 illustrates calls originated and terminated in the same LATA. The right side illustrates terminating calls from an interexchange carrier that were originated in another LATA. Reference is made to a database in Figure 3-2 to perform the necessary screening and translations on the 555 line
22、 number to determine the proper carrier or 555 assignee interface. The use of a database and its location is the decision of the individual network provider(s). References are also made to 555 calls from wireless stations via a MTSO (Mobile Telephone Switching Office). However, such 555 technical in
23、terconnection arrangements are not detailed in this document. The signaling interfaces between switching entities in Figure 3-2 indicate options that are labeled as follows: Originating Terminating From To Signaling From To Signaling MTSOEO Type 1 or 2B IC AT/OS D (Terminating) MTSO* LT/AT/OS Type2A
24、/Type2D AT/OS SP ET MTSO IC D, O, DC (Subject EO SP EL (to negotiation) AT/OS IC or SP D, O EO SP ET EO IC or SP D, O IC SP DC (subject to negotiation) EO SP EL EO SP ET Options Dialing: 7 or 10 digit Translations: originating or terminating Routing: PIC, designated carrier or service provider Signa
25、ling Interface: FG D, OSS, Type1, 2A, 2B, 2D or Exchange Abbreviations D = Feature Group D DC = Direct Connection O = Operator Services Signaling MTSO = Mobile Telephone Switching Office EL = Exchange Line Side AT = Access Tandem ET = Exchange Trunk Side EO = End Office LT = Local Tandem IC = Intere
26、xchange Carrier _ Not all of these interconnections support subscribers ANI. (See TR-NWT-000145 Compatibility Information for Interconnection of a Wireless Service Provider and the Local Exchange Network for details.) iiATIS-0300077 AT/OSD or OMTSOLT/AT/OSICICEOETType 1 or 2BELEOORIG/TERMTERMDCType
27、2A/Type 2DD (Term)ETD or OELETDCFigure 3-2iiATIS-0300077 3.3 Potential 555 Technical Service Arrangements (Table 1) Table 1 summarizes potential technical service interconnection arrangements that could be considered for the implementation of services using the 555 number resource. Although the Tabl
28、e lists several arrangements, it may not be inclusive of all possible applications; it is included to provide the reader with examples of potential service arrangements. The service types identified in Column I indicate whether the application is for a DA-like service or information service. Column
29、II shows the party(ies) who may be billed for each of the service applications. The potential need for end user blocking is shown in Column III. Columns IV and V indicate what both the dialing plan and the routing translations could be on either a 7 or 10 digit basis. Column VI describes the call ro
30、uting which might be to a local termination (e.g., intraLATA service) or to an interexchange carrier which could be either the PIC of the originating caller or the carrier designated by the 555 assignee. Possible signaling/protocol arrangements that might be available for each application are depict
31、ed in Column VII. Table 1 - Potential Technical Service Interconnection Arrangements I Service II Billed to III Blocking IVDialing Plan V Translations Note 2 VIRouting VII Signaling/ Protocol DA-like Calling Party 555 Assignee May be required. Note 1 7/10D 7/10D Local Term PIC Designated Carrier MF,
32、 SS7/ FG D OS Type 1 Type 2 800-like 555 Assignee No 7/10D 7/10D Local Term PIC Designated Carrier MF, SS7/ Exchange FG D Type 1 Type 2 900/976-like Calling Party 555 Assignee May be required. Note 1 7/10D 7/10D Local Term PIC Designated Carrier MF, SS7/ Exchange FG D Type 1 Type 2 Note 1 Blocking m
33、ay be required to meet regulatory requirements, depending on the type of service. Note 2 The translation of the dialed number to a different (routable) number could be performed in the originating, intermediate or terminating network. iiATIS-0300077 5 Blocking Considerations Blocking will be impleme
34、nted according to jurisdictional rules/requirements. Additional blocking requirements by an end user, 555 assignee, or network provider may be provided on an individual case basis. 6 Billing that is, the location designated by the 555 assignee. In some cases the location of the _ 3It is recognized t
35、hat there may be local networks which are unable or unwilling to perform the translations necessary to route a call dialed with a 555 number. In such cases, these networks may elect to pass the call to another network. iiATIS-0300077 555 assignee will be directly connected to the designated carriers
36、 network. Alternatively, if there were no direct connection, the designated carrier could translate the dialed 555 number to a routable number and complete the call via a terminating network using terminating switched access. 7.4 Calls Routed to the Presubscribed Interexchange Carrier (PIC) Existing
37、 capabilities within the originating network would allow interLATA 555 calls to continue to be forwarded to the PIC of the calling line or the carrier designated by Carrier Access Code (10XXX/101XXXX) dialing, using FG D signaling protocol. With this arrangement, the PIC may have the information nec
38、essary to route the call to the location designated by the 555 assignee, or the PIC could route the call to a designated switch in the terminating network. That switch may have the information necessary to route the call to a location designated by the 555 assignee. 7.5 Additional Considerations In
39、areas where 555 service is offered, any arrangements currently employed by carriers which only allows calls to (NPA) 555-1212 and blocks all other (NPA) 555-XXXX calls to Directory Assistance, or routes all NPA 555-XXXX calls to DA, regardless of the “555” line number dialed, will need to be removed
40、 if completion of calls to other 555 numbers is desired. Finally it should be recognized that any implementation of routing for 555 calls must retain the current disposition of calls dialed (1) + (NPA) 555-1212. These calls will continue to be routed to the originating service provider, PIC of the c
41、alling line or the (10XXX/101XXXX) designated carrier. It should be further recognized that support of multiple technical service interconnection arrangements for 555 could have extensive technical network impacts and may not be practical or feasible for all network providers. 8 Glossary This sectio
42、n includes a glossary of terms and acronyms used in this document. 8.1 Definitions 555 Assignee - The entity to whom a 555 number has been assigned. Access Provider - Any Local Exchange Carrier who provides network interconnection arrangements to permit Access Customers to originate and/or terminate
43、 telecommunications in the areas in which the Local Exchange Carrier offers telecommunications services. Advanced Intelligent Network (AIN) - A service-independent architecture which allow its service provider to create/or modify telecommunications services. Automatic Number Identification (ANI) - T
44、he automatic identification of the calling station. The ANI normally consists of the calling partys billing number. Carrier Identification Code (CIC) - A numeric code which is currently used to identify a customer who purchased Feature Group B and/or Feature Group D access services. Called Party Pay
45、s - A service for which the end user receives and pays for call. Calling Party Pays - A service for which the end user originates and pays for a call. Designated Carrier - The carrier selected by the 555 assignee. The Designated Carrier is determined via 7 or 10 digit translation of the dialed numbe
46、r. Directory Assistance (DA) - A service providing the listed telephone number for a given name and address. Directory Assistance Call Completion (DACC) - After the listed telephone number has been obtained, DACC is a service that permits a call to be completed to the requested number, typically at
47、the calling partys option for an additional charge. iiATIS-0300077 Exchange Access Services - Exchange access is a service provided by LECs to interconnecting entities (such as interexchange carriers) in the areas in which the LECs offer telecommunication services. Foreign NPA (FNPA) - Any other NPA
48、 outside the geographic NPA from which a call originates. Home NPA (HNPA) - The geographic NPA from which a call originates. Interexchange Carrier (IC) - A common carrier that provides services to the public between local exchanges on an intraLATA basis in compliance with local or Federal regulatory
49、 requirements and that is not an end user of the services provided. Industry Numbering Committee (INC) INC, a standing committee of the Alliance for Telecommunications Industry Solutions (ATIS) that provides an open forum to address and resolve industry-wide issues associated with the planning, administration, allocation, assignment and use of numbering resources and related dialing considerations for public telecommunications within the North American Numbering Plan (NANP) area. Intermediate Network - Any interconnecting network(s) between the originating
