ATIS 1000006-2005 Signalling Systems No 7 (SS7) - Emergency Telecommunications Service (ETS).pdf

1、 AMERICAN NATIONAL STANDARD FOR TELECOMMUNICATIONS ATIS-1000006.2005 (R2015) SIGNALLING SYSTEM NO. 7 (SS7) EMERGENCY TELECOMMUNICATIONS SERVICE (ETS) As a leading technology and solutions development organization, ATIS brings together the top global ICT companies to advance the industrys most-pressi

2、ng business priorities. Through ATIS committees and forums, nearly 200 companies address cloud services, device solutions, emergency services, M2M communications, cyber security, ehealth, network evolution, quality of service, billing support, operations, and more. These priorities follow a fast-tra

3、ck development lifecycle from design and innovation through solutions that include standards, specifications, requirements, business use cases, software toolkits, and interoperability testing. ATIS is accredited by the American National Standards Institute (ANSI). ATIS is the North American Organiza

4、tional Partner for the 3rd Generation Partnership Project (3GPP), a founding Partner of oneM2M, 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 mo

5、re 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 established when, in the judgment of the ANSI

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8、 to the standards. The American National Standards Institute does not develop standards and will in no circumstances give an interpretation of any American National Standard. Moreover, no person shall have the right or authority to issue an interpretation of an American National Standard in the name

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10、 National Standards Institute require that action be taken periodically to reaffirm, revise, or withdraw this standard. Purchasers of American National Standards may receive current information on all standards by calling or writing the American National Standards Institute. Notice of Disclaimer T1.

11、113-2000, Signalling system no. 7 (SS7) Integrated services digital network (ISDN) User part; and T1.401-2000, Interface between carriers and customer installations Analog voice grade switched access lines using loop-start and ground-start signalling. Footnotes are not officially part of this standa

12、rd. Future control of this document will reside with Packet Technologies and Systems Committee (PTSC). This control of additions to the specification, such as protocol evolution, new applications, and operational requirements, will permit compatibility among U.S. networks. Such additions will be inc

13、orporated in an orderly manner with due consideration to the ITU-T layered model principles, conventions, and functional boundaries. The Packet Technologies and Systems Committee (PTSC) formerly T1S1 develops and recommends standards and technical reports related to services, architectures, and sign

14、aling, in addition to related subjects under consideration in other North American and international standards bodies. PTSC coordinates and develops standards and technical reports relevant to telecommunications networks in the U.S., reviews and prepares contributions on such matters for submission

15、to U.S. ITU-T and U.S. ITU-R Study Groups or other standards organizations, and reviews for acceptability or per contra the positions of other countries in related standards development and takes or recommends appropriate actions. ANSI guidelines specify two categories of requirements: mandatory and

16、 recommendation. The mandatory requirements are designated by the word shall and recommendations by the word should. Where both a mandatory requirement and a recommendation are specified for the same criterion, the recommendation represents a goal currently identifiable as having distinct compatibil

17、ity or performance advantages. Suggestions for improvement of this standard will be welcome. These should be sent to the Alliance for Telecommunications Industry Solutions, PTSC Secretariat, 1200 G Street, NW, Suite 500, Washington DC 20005. This standard was processed and approved for submittal to

18、ANSI by PTSC. Committee approval of this standard does not necessarily imply that all committee members voted for its approval. At the time it approved this standard, PTSC had the following members: R. Hall, PTSC Chair J. Zebarth, PTSC Vice-Chair S. Carioti, ATIS Disciplines S. Barclay, ATIS Secreta

19、riat C. Underkoffler, ATIS Chief Editor Viqar A Shaikh, PTSC Technical Editor Organization Represented Name of Representative Alcatel USA Inc. Ken Biholar AT A special indicator carried through the network with the call set-up signalling to identify the call as an ETS call; and Use of higher MTP mes

20、sage priority level value for SS7 messages to increase the probability of successful transfer in the case of congestion in the signalling network. This service shall not be used except as authorized by the appropriate U.S. government agency. The authorization mechanism is beyond the scope of this st

21、andard other than the prohibition for unauthorized use. 2 NORMATIVE REFERENCES The following standard contains provisions, which, through reference in this text, constitute provisions of this American National Standard. At the time of publication, the edition indicated was valid. All standards are s

22、ubject to revision, and the parties to agreements based on this American National Standard are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. ATIS-PP-1000111.2005, Signalling system no. 7 (SS7) Message transfer part (MTP).1,2ATIS-PP-100

23、0113.2005, Signalling system no. 7 (SS7) Integrated services digital network (ISDN) User part.1,3T1.PP-114-2004, Signalling System Number 7 (SS7) Transaction Capabilities Application Part (TCAP).1,4T1.401-2000, Network to Customer Installation Interfaces - Analog Voicegrade Switched Access Lines Usi

24、ng Loop-Start and Ground Start Signaling.1T1.609-1999, Interworking between the ISDN UserNetwork Interface Protocol and the Signaling System No. 7 ISDN User Part.1T1.615-1992 (R2004), Digital Subscriber Signaling System No. 1 DSS1 Layer 3 Overview.1T1.667-2002, Intelligent Network.1T1.673-2002, Bear

25、er Independent Call Control (BICC) Capability Set (CS) 1+.1_ 1This document is available from the Alliance for Telecommunications Industry Solutions (ATIS), 1200 G Street N.W., Suite 500, Washington, DC 20005. 2Pre-published version; the number of this standard upon formal publication will be ATIS-1

26、000111.2005. 3Pre-published version; the number of this standard upon formal publication will be ATIS-1000113.2005. 4Pre-published version; the number of this standard upon formal publication will be T1.114-2004. ATIS-1000006.2005 3 ITU-T Recommendation Q.761, Amendment 2, ISUP functional descriptio

27、n, Support for the International Emergency Preference Scheme.5ITU-T Recommendation Q.762, Amendment 1, ISUP general functions of messages and signals, Support for the International Emergency Preference Scheme.5ITU-T Recommendation Q.763, Amendment 2, ISUP formats and codes, Support for the Internati

28、onal Emergency Preference Scheme.5ITU-T Recommendation Q.764, Amendment 2, ISUP signalling procedures, Support for the International Emergency Preference Scheme.5ITU-T Recommendation Q.767, Amendment 1, Application of the ISUP of CCITT Signalling System No. 7 for International ISDN Interconnections,

29、 Support for the International Emergency Preference Scheme.5ITU-T Recommendation Q.1902.1, Amendment 1, Bearer independent call control protocol (CS2) functional description, Support for the International Emergency Preference Scheme.5ITU-T Recommendation Q.1902.2, Amendment 1, Bearer independent cal

30、l control protocol (CS2) and Signalling system No.7 ISDN user part general functions of messages and signals, Support for the International Emergency Preference Scheme.5ITU-T Recommendation Q.1902.3, Amendment 1, Bearer independent call control protocol (CS2) and Signalling system No.7 ISDN user par

31、t formats and codes, Support for the International Emergency Preference Scheme.5ITU-T Recommendation Q.1902.4, Amendment 1, Bearer independent call control protocol Basic call procedures, Support for the International Emergency Preference Scheme.5ITU-T Recommendation Q.1950, Bearer independent call

32、control protocol.5ITU-T Recommendation E.106, International Emergency Preference Scheme for Disaster Relief Operations (IEPS).5ITU-T Recommendation H.323, Packet-based Multimedia Communications Systems.5ITU-T Recommendation H.225.0, Call Signalling Protocols and Media Stream Packetization for Packet

33、-based Multimedia Communication Systems.5ITU-T Recommendation H.460.4, Call Priority Designation for H.323 Calls.53 DEFINITIONS 3.1 Local Exchange (LE): A switch in the public network to which “users” are connected. 3.2 Transit Exchange (TE): A switch in the public network that provides connections

34、between two Exchanges. _ 5This document is available from the International Telecommunications Union. ATIS-1000006.2005 4 4 ABBREVIATIONS, ACRONYMS, AND SYMBOLS ACM Address Complete Message ACR Alternate Carrier Routing ANM Answer Message ANSI American National Standards Institute ATIS Alliance for

35、Telecommunications Industry Solutions BCF Bearer Control Function BICC Bearer Independent Call Control BNC Bearer Network Connection CIC Circuit Identification Code ISUP CIC Call Instance Code BICC CMN Call Mediation Node COT Continuity Message CPC Calling Partys Category CSF Call Service Function E

36、TS Emergency Telecommunications Service IAM Initial Address message IEPS International Emergency Preference Scheme ISDN Integrated Services Digital Network ISUP ISDN User Part LE Local Exchange LNP Local Number Portability MTP Message Transfer Part NS/EP National Security and Emergency Preparedness

37、PIN Personal Identification Number PSTN Public Switched Telephone Network SIP Session Initiation Protocol SN Serving Node STP Signalling Transfer Point TCAP Transaction Capabilities Application Part TE Transit Exchange 5 GENERAL DESCRIPTION The configurations of network entities described in this st

38、andard are depicted in Figure 1. The network entities and signalling interfaces shown with dashed lines are included for reference only and are not specified in this standard. The network and user equipment configurations shown are based on the “functional groupings” defined in T1.6151992 (R2004) an

39、d applicable ITU-T Recommendations on ISDN. Although these ATIS-1000006.2005 5 functional groupings may correspond to actual physical entities, an actual implementation may incorporate more than one of these functional groupings in a single physical entity or may provide a subset of one or more of t

40、hese functional groupings. 5.1 End User Perspective The calling partys authorization to initiate an ETS call must be authenticated. Authentication may be on a per-call basis, on a one-time (time-limited) authentication basis applicable to the calling partys current access, or on a subscription basis

41、. If authentication is per call, the end user may initiate authentication via a call to an authentication function using a unique directory number or an access code. The authentication process may involve an interactive exchange of authorization details that may include a Personal Identification Num

42、ber (PIN) or other authorization/identification code. Authorization information may be directly entered by either the calling party or by the network. If the calling party fails authentication, the call shall fail with an indication to the user. This indication may be ETS-specific. If there is no re

43、sponse to a request for authentication (e.g., the authentication function itself has failed), the call shall proceed as an ETS call with default priority. The user may receive an indication that the call is proceeding with default priority. The delay caused by invocation of ETS-specific functions du

44、ring setup of an ETS call may be conveyed to the calling party by the use of specialized signals that inform the calling party that the setup attempt is continuing e.g., to reflect invocation of network functions to increase the probability of call completion. 5.2 Operation at the Originating Exchan

45、ge 5.2.1 Identifying a Request for ETS Service This standard does not specify a particular method that must be used by an originating Local Exchange (LE) to identify an ETS request. Examples of how this might be performed include, but are not limited to, the following: A special access code such as

46、*XXX preceding the dialed called party number; Call origination from a specially marked line; Recognition of calls to a set of unique called party numbers or a range of numbers; Administrative actions to activate the service for all calls from a particular line for a period of time. The originating

47、LE may query an ETS-specific database application as part of the process of verifying whether a request for ETS service is valid. The query to this database includes information identifying the calling line and the complete set of digits dialed by the calling party. The query may also include additi

48、onal information collected by the originating LE e.g., a personal identification number (PIN) collected following a prompt by the originating LE. The originating LE shall mark the outgoing Transaction Capabilities Application Part (TCAP) message with a Message Transfer Part (MTP) message priority of

49、 2. ATIS-1000006.2005 6 The reply from the ETS-specific database shall either direct the originating LE to continue with ETS call setup (since the calling party has been authenticated as an authorized user of the service) or to fail the call (since the calling party is not an authorized user of the service.) In the event the reply is not received in the allowed response time, or if the reply contains a protocol error, the originating LE will assign a default priority level and treat the call request as coming from an authoriz