1、 ATIS-1000609.2014 Interworking between the ISDN User-Network Interface Protocol and Signalling System Number 7 ISDN User Part AMERICAN NATIONAL STANDARD FOR TELECOMMUNICATIONS As a leading technology and solutions development organization, ATIS brings together the top global ICT companies to advanc
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5、 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 established when, i
6、n the judgment of the ANSI Board of Standards Review, substantial agreement has been reached by directly and materially affected interests. Substantial agreement means much more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, and
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8、r procedures not conforming 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 Na
9、tional Standard in the name of the American National Standards Institute. Requests for interpretations should be addressed to the secretariat or sponsor whose name appears on the title page of this standard. CAUTION NOTICE: This American National Standard may be revised or withdrawn at any time. The
10、 procedures of the American 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 Institut
11、e. Notice of Disclaimer 2) To provide a logical bridge between the abstract signalling information flows, which are used in the description of ISDN services, and the corresponding messages and elements of procedure of the ISDN access and network signalling systems. 1.3 Scope This standard is aimed a
12、t defining the interworking relationship between the call control protocol of the ISDN User-Network Interface Protocol and the ISDN User Part of SS7. This standard defines in detail the relationship between signalling information conveyed via the User- Network Interface Protocol and similar signalli
13、ng information conveyed via the ISDN User Part of SS7. The above relationship is described within the context of supporting the establishment and clearing of a call within an ISDN or mixed ISDN/non-ISDN environment. NOTE - Although sufficient information is included in this standard to allow impleme
14、ntation of the interworking functionality, not all possible combinations of interworking scenarios are documented explicitly. 1.4 Relationship to Other American National Standards This standard forms part of a set of interlocking ISDN service and signalling standards. Other members of this set inclu
15、de the following: 1Due to the extensive changes in this document from the previous issue, ATIS-1000609, no change markings are provided 6 ATIS-1000609.2014 American National Standard for Telecommunications - Signalling System Number 7 (SS7) - Integrated Services Digital Network (ISDN) User Part, ATI
16、S-1000113.2005(R2010)2American National Standard for Telecommunications - Integrated Services Digital Network (ISDN) - Minimal Set of Bearer Services for the Primary Rate Interface, ATIS-1000603.1993(R2009)3American National Standard for Telecommunications - Integrated Services Digital Network (ISDN
17、) - Minimal Set of Bearer Services for the Basic Rate Interface, ATIS-1000604.1990(R2009)4American National Standard for Telecommunications - Integrated Services Digital Network (ISDN) - Layer- 3 Signalling Specification for Circuit-Switched Bearer Service for Digital Subscriber Signaling System Num
18、ber 1 (DSS 1), ATIS-1000607.2000(R2009)5. American National Standard for Telecommunications - Integrated Services Digital Network (ISDN) - Integrated Services Digital Network (ISDN) Circuit-Mode Bearer Service Category Description, ATIS-1000620.1991(R2012)6American National Standard for Telecommunic
19、ations - Integrated Services Digital Network (ISDN) - Circuit-Mode Bearer Service Category Description, ATIS-1000620.a.1992(R2009)7The signalling messages and elements of procedure of the User-Network Interface Protocol and the ISDN User Part of Signalling System Number 7 are defined in ATIS-1000607
20、 and ATIS-1000113, respectively. 1.5 Normative References The following standards contain provisions, which, through reference in this text, constitute provisions of this American National Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision,
21、 and parties to agreements based on this American National Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. ATIS-1000113.2005(R2010), Telecommunications - Signalling System Number 7 (SS7) - Integrated Services Digital Netwo
22、rk (ISDN) User Part2 ATIS-1000603.1993(R2009) Telecommunications - Integrated Services Digital Network (ISDN) - Minimal Set of Bearer Services for the Primary Rate Interface3 ATIS-1000604.1990(R2009), Telecommunications - Integrated Services Digital Network (ISDN) - Minimal Set of Bearer Services fo
23、r the Basic Rate Interface4 ATIS-1000607.2000(R2009), Telecommunications - Integrated Services Digital Network (ISDN) - Layer 3 Signaling Specification for Circuit Switched Bearer Service for Digital Subscriber Signaling System Number 1 (DSS 1)5 2This document is available from the Alliance for Tele
24、communications Industry Solutions (ATIS), 1200 G Street N.W., Suite 500, Washington, DC 20005 3This document is available from the Alliance for Telecommunications Industry Solutions (ATIS), 1200 G Street N.W., Suite 500, Washington, DC 20005 4This document is available from the Alliance for Telecomm
25、unications Industry Solutions (ATIS), 1200 G Street N.W., Suite 500, Washington, DC 20005 5This document is available from the Alliance for Telecommunications Industry Solutions (ATIS), 1200 G Street N.W., Suite 500, Washington, DC 20005 6This document is available from the Alliance for Telecommunic
26、ations Industry Solutions (ATIS), 1200 G Street N.W., Suite 500, Washington, DC 20005 7This document is available from the Alliance for Telecommunications Industry Solutions (ATIS), 1200 G Street N.W., Suite 500, Washington, DC 20005 7 ATIS-1000609.2014 ATIS-1000620.1991(R2012), Telecommunications -
27、 Integrated Services Digital Network (ISDN) - Circuit- Mode Bearer Service Category Description6 ATIS-1000620.a.1992(R2009), Telecommunications - Integrated Services Digital Network (ISDN) - Circuit- Mode Bearer Service Category Description7 ATIS-1000625.1993(R2013), Telecommunications - Integrated
28、Services Digital Network (ISDN) - Calling Line Identification Presentation and Restriction Supplementary Service8ATIS-1000650.1995(R2010), Telecommunications - Integrated Services Digital Network (ISDN) - Usage of the Cause Information Element in Digital Subscriber Signaling System Number 1 (DSS 1)9
29、1.6 Methodology Annex A provides, for information, a description used to model and define interworking between the DSS1 and the ISUP signalling systems. The elements of information (parameters, information elements, and messages) that are of local significance only, i.e. are not mapped onto elements
30、 of information in the other signalling system, are not mentioned. Moreover, only the parameters and indicators being a matter of interworking are described. Hence, no information is given concerning e.g. the satellite indicator, the continuity check indicator, or the echo control device indicator.
31、Nomenclature: Throughout this document, the ISUP message names are written in lower-case letters and the DSS1 message names in upper-case letters. ISUP segmentation: Some ISUP messages may be segmented. The actions described in this document on receipt of segmented messages take place only after the
32、 completion of the segmentation/reassembly procedure specified in 2.1 of chapter 4 of ATIS-1000113. ISUP messages which can be segmented are described in 2.1 of chapter 4 of ATIS-1000113. DSS1 segmentation: When it is said in the text that a specific DSS1 message is received, in case of segmentation
33、 the content of this message is received in SEGMENT messages. The actions described in this document then take place only after the completion of the DSS1 segmentation/reassembly procedure specified in Annex K of ATIS-1000607. Handling of the cause, location and progress indicator fields: When a cau
34、se parameter or information element has to be sent by the exchange, only the cause value is given in the text; the location indication is coded according to the procedures of ATIS-1000607 and ATIS-1000113 and using the encodings specified in ATIS-1000650 and ATIS-1000113. When a progress indicator i
35、nformation element has to be sent by the exchange, only the progress description is given in the text; the location indication is coded according to the encodings and procedures of ATIS-1000607. The handling of the diagnostic received in a cause parameter or in a cause information element is de- scr
36、ibed in ATIS-1000607. 8This document is available from the Alliance for Telecommunications Industry Solutions (ATIS), 1200 G Street N.W., Suite 500, Washington, DC 20005 9This document is available from the Alliance for Telecommunications Industry Solutions (ATIS), 1200 G Street N.W., Suite 500, Was
37、hington, DC 20005 8 ATIS-1000609.2014 Services Interactions: Impacts of services interactions on interworking are not described in this standard. 1.7 Symbols the other Transit network selection information element(s) is (are) discarded. Whenever one or more TNS information element(s) is (are) dis- c
38、arded, a STATUS message shall be returned over the DSS1 interface coded with Cause #43, access information discarded, a location of public network serving the local user, and a diagnostic with the TNS IE identifier. Alternatively, transit network selection information may be received from the user i
39、n the Keypad facility information element or in the Called party number information element (with type of number/numbering plan indicator coding of unknown number in unknown numbering plan). In these cases, the called party number is preceded by the prefix 10XXX/101XXXX, where XXX(X) is the carrier
40、identification code. The network identification octets of the Transit network selection parameter shall be coded according to the XXX(X) carrier identification code10Access transport The Access transport parameter (ATP) is coded as shown in Table 1: Table 1 - Contents of the Access Transport Paramet
41、er SETUP IAM Content Access transport parameter Progress indicator Progress indicator High layer compatibility (Note 1) High layer compatibility Low layer compatibility Low layer compatibility Called party subaddress Called party subaddress Calling party subaddress Calling party subaddress Locking s
42、hift (Note 2) Locking shift (Note 2) Non-locking shift (Note 2) Non-locking shift (Note 2) Note 1: If two High layer compatibility (HLC) information elements are received in the SETUP message, they are transferred in the same order as received in the Access transport parameter of the Initial Address
43、 Message. Note 2: Information elements in codeset 5, 6, or 7 requiring transport are carried in the ATP with the appropriate Locking shift information element. 10At the conclusion of the Carrier Identification Code “permissive period” (as determined by the FCC), only four-digit carrier identificatio
44、n codes (XXXX) may be used in US networks. 12 ATIS-1000609.2014 For outgoing International Calls, none of the codeset 5 and 6 information elements is allowed to be included in the Access Transport parameter. For inter-network calls, codeset 6 information elements shall not be included in the Access
45、Transport parameter. User service information The USI parameter is coded as shown in Table 2. Table 2 - Coding of the User Service Information parameter SETUP IAM (Notes 3 the network may not connect the user to tones and announcements. 2.1.1.2.2 ACM without the Cause Parameter Upon receiving an ACM
46、, without a Cause parameter, the exchange shall send a message across the user-network interface to the calling user, as described in Table 5. Table 5 -Message sent over the DSS1 interface upon receipt of ACM Message sent to the DSS1 ACM Backward call indicators parameter Called partys status indica
47、tor. PROGRESS if a Progress indi- cator information element is to be sent (Note 2) No message if no Progress indi- cator information element is to be sent (Note 2) 00 (no indication) (Note 1) or 11 (excessive delay) ALERTING 01 (Subscriber free) Note 1: For networks supporting ISUP overlap signallin
48、g, the receipt from the network of an ACM without the subscriber free indication is interpreted by the network as a sending complete indication, in the case where the network couldnt determine it before. Note 2: The sending of a Progress indicator information element is described below. 14 ATIS-1000
49、609.2014 The DSS1 message sent to the calling user (ALERTING or PROGRESS message) may include the Bearer capability information element, Progress information elements, and High layer compatibility information element as described below: Bearer capability If the transmission medium used parameter or the Bearer capability information element in the access transport parameter is present in the ACM received, see “handling of fallback information” at the end of this subclause. Progress indicator Progress indicator information elements possibly present in the access transport parameter o
