SIST EN 383 001 V1.1.1:2006

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.'1XSRUDEQLãNLPTelecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); Interworking between Session Initiation Protocol (SIP) and Bearer Independent Call Control (BICC) Protocol or ISDN User Part (ISUP) [ITU-T Recommendation Q.1912.5, modified]33.080Digitalno omrežje z integriranimi storitvami (ISDN)Integrated Services Digital Network (ISDN)33.040.01Telekomunikacijski sistemi na splošnoTelecommunication systems in generalICS:Ta slovenski standard je istoveten z:EN 383 001 Version 1.1.1SIST EN 383 001 V1.1.1:2006en01-september-2006SIST EN 383 001 V1.1.1:2006SLOVENSKI
STANDARD



SIST EN 383 001 V1.1.1:2006



ETSI EN 383 001 V1.1.1 (2006-06)European Standard (Telecommunications series) Telecommunications and Internet converged Services andProtocols for Advanced Networking (TISPAN);Interworking between Session Initiation Protocol (SIP) andBearer Independent Call Control (BICC)Protocol or ISDN User Part (ISUP)[ITU-T Recommendation Q.1912.5, modified]
SIST EN 383 001 V1.1.1:2006



ETSI ETSI EN 383 001 V1.1.1 (2006-06) 2
Reference DEN/TISPAN-03008-NGN-R1 Keywords endorsement, SIP, BICC, ISUP, interworking ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00
Fax: +33 4 93 65 47 16
Siret N° 348 623 562 00017 - NAF 742 C Association à but non lucratif enregistrée à la Sous-Préfecture de Grasse (06) N° 7803/88
Important notice Individual copies of the present document can be downloaded from: http://www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at http://portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: http://portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 2006. All rights reserved.
DECTTM, PLUGTESTSTM and UMTSTM are Trade Marks of ETSI registered for the benefit of its Members. TIPHONTM and the TIPHON logo are Trade Marks currently being registered by ETSI for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. SIST EN 383 001 V1.1.1:2006



ETSI ETSI EN 383 001 V1.1.1 (2006-06) 3
Contents Intellectual Property Rights.4 Foreword.4 1 Scope.5 2 References.5 3 Definitions and abbreviations.7 Endorsement notice.7 Global modifications to ITU-T Recommendation Q.1912.5.7 Annex ZA (informative): Bibliography.28 History.29
SIST EN 383 001 V1.1.1:2006



ETSI ETSI EN 383 001 V1.1.1 (2006-06) 4
Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http://webapp.etsi.org/IPR/home.asp). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This European Standard (Telecommunications series) has been produced by ETSI Technical Committee Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN).
National transposition dates Date of adoption of this EN: 26 May 2006 Date of latest announcement of this EN (doa): 31 August 2006 Date of latest publication of new National Standard or endorsement of this EN (dop/e):
28 February 2007 Date of withdrawal of any conflicting National Standard (dow): 28 February 2007
SIST EN 383 001 V1.1.1:2006



ETSI ETSI EN 383 001 V1.1.1 (2006-06) 5
1 Scope The present document provides the ETSI endorsement of the ITU-T Recommendation Q.1912.5 [1]. ITU-T Recommendation Q.1912.5 [1] defines the signalling interworking between the Bearer Independent Call Control (BICC) or ISDN User Part (ISUP) protocols and SIP in order to support services that can be commonly supported by BICC or ISUP and SIP-based network domains. The present document is applicable to ETSI PSTN/ISDN networks interworking with networks based on an IETF based SIP/SDP profile as defined in annex C of ITU-T Recommendation Q.1912.5 [1]. In the case where an IMS-based network interworks with the PSTN/ISDN, then the ETSI endorsement of 3GPP TS 29.163, in either ETSI TS 129 163 [29] and ETSI ES 283 027 as appropriate to the applicability of each document, takes precedence. Formats, codes and procedures marked for national use or as network option are included for informative purposes for the international interface specification. If these items so marked are supported within a national network and operator's network, then it is proposed that they are supported in this manner. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. • References are either specific (identified by date of publication and/or edition number or version number) or non-specific. • For a specific reference, subsequent revisions do not apply. • For a non-specific reference, the latest version applies. Referenced documents which are not found to be publicly available in the expected location might be found at http://docbox.etsi.org/Reference. [1] ITU-T Recommendation Q.1912.5 (2004): "Interworking between Session Initiation Protocol (SIP) and Bearer Independent Call Control protocol or ISDN User Part". [2] ETSI EN 302 213 (V1.1.2): "Services and Protocols for Advanced Networks (SPAN); Bearer Independent Call Control (BICC) Capability Set 2 (CS2); Protocol specification [ITU-T Recommendations Q.1902.1, Q.1902.2, Q.1902.3, Q.1902.4, Q.1902.5, Q.1902.6, Q.765.5 Amendment 1, Q.1912.1, Q.1912.2, Q.1912.3, Q.1912.4, Q.1922.2, Q.1950, Q.1970, Q.1990, Q.2150.0, Q.2150.1, Q.2150.2, Q.2150.3, modified]". [3] ETSI EN 300 356-1 (V4.2.1): "Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) version 4 for the international interface; Part 1: Basic services [ITU-T Recommendations Q.761 to Q.764 (1999) modified]". [4] ETSI EN 300 356-3 (V4.2.1): "Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) version 4 for the international interface; Part 3: Calling Line Identification Presentation (CLIP) supplementary service [ITU-T Recommendation Q.731, clause 3 (1993) modified]". [5] ETSI EN 300 356-4 (V4.2.1): "Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) version 4 for the international interface; Part 4: Calling Line Identification Restriction (CLIR) supplementary service [ITU-T Recommendation Q.731, clause 4 (1993) modified]". [6] ETSI EN 300 356-5 (V4.1.2): "Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) version 4 for the international interface; Part 5: Connected Line Identification Presentation (COLP) supplementary service [ITU-T Recommendation Q.731, clause 5 (1993) modified]". SIST EN 383 001 V1.1.1:2006



ETSI ETSI EN 383 001 V1.1.1 (2006-06) 6
[7] ETSI EN 300 356-6 (V4.1.2): "Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) version 4 for the international interface; Part 6: Connected Line Identification Restriction (COLR) supplementary service [ITU-T Recommendation Q.731, clause 6 (1993) modified]". [8] ETSI EN 300 356-7 (V4.1.2): "Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) version 4 for the international interface; Part 7: Terminal Portability (TP) supplementary service [ITU-T Recommendation Q.733, clause 4 (1993) modified]". [9] ETSI EN 300 356-8 (V4.1.2): "Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) version 4 for the international interface; Part 8: User-to-User Signalling (UUS) supplementary service [ITU-T Recommendation Q.737, clause 1 (1997) modified]". [10] ETSI EN 300 356-9 (V4.1.2): "Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) version 4 for the international interface; Part 9: Closed User Group (CUG) supplementary service [ITU-T Recommendation Q.735, clause 1 (1993) modified]". [11] ETSI EN 300 356-10 (V4.1.2): "Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) version 4 for the international interface; Part 10: Subaddressing (SUB) supplementary service [ITU-T Recommendation Q.731, clause 8 (1992) modified]". [12] ETSI EN 300 356-11 (V4.1.2): "Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) version 4 for the international interface; Part 11: Malicious Call Identification (MCID) supplementary service [ITU-T Recommendation Q.731, clause 7 (1997) modified]". [13] ETSI EN 300 356-12 (V4.2.1): "Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) version 4 for the international interface; Part 12: Conference call, add-on (CONF) supplementary service [ITU-T Recommendation Q.734, clause 1 (1993) and implementors guide (1998) modified]". [14] ETSI EN 300 356-14 (V4.2.1): "Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) version 4 for the international interface; Part 14: Explicit Call Transfer (ECT) supplementary service [ITU-T Recommendation Q.732, clause 7 (1996) and implementors guide (1998) modified]". [15] ETSI EN 300 356-15 (V4.2.1): "Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) version 4 for the international interface; Part 15: Diversion supplementary service [ITU-T Recommendation Q.732, clauses 2 to 5 (1999) modified]". [16] ETSI EN 300 356-16 (V4.1.2): "Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) version 4 for the international interface; Part 16: Call Hold (HOLD) supplementary service [ITU-T Recommendation Q.733, clause 2 (1993) modified]". [17] ETSI EN 300 356-17 (V4.1.2): "Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) version 4 for the international interface; Part 17: Call Waiting (CW) supplementary service [ITU-T Recommendation Q.733, clause 1 (1992) modified]". [18] ETSI EN 300 356-18 (V4.1.2): "Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) version 4 for the international interface; Part 18: Completion of Calls to Busy Subscriber (CCBS) supplementary service [ITU-T Recommendation Q.733, clause 3 (1997) modified]". [19] ETSI EN 300 356-19 (V4.2.1): "Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) version 4 for the international interface; Part 19: Three-Party (3PTY) supplementary service [ITU-T Recommendation Q.734, clause 2 (1996) and implementors guide (1998) modified]". SIST EN 383 001 V1.1.1:2006



ETSI ETSI EN 383 001 V1.1.1 (2006-06) 7
[20] ETSI EN 300 356-20 (V4.3.1): "Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) version 4 for the international interface; Part 20: Completion of Calls on No Reply (CCNR) supplementary service [ITU-T Recommendation Q.733, clause 5 (1999) modified]". [21] ETSI EN 300 356-21: "Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) version 4 for the international interface; Part 21: Anonymous Call Rejection (ACR) supplementary service [ITU-T Recommendation Q.731, clause 4 (1993)]". [22] ETSI EN 300 485 (V1.2.3): "Integrated Services Digital Network (ISDN); Definition and usage of cause and location in Digital Subscriber Signalling System No. one (DSS1) and Signalling System No.7 ISDN User Part (ISUP) [ITU-T Recommendation Q.850 (1998), modified]". [23] IETF RFC 3261 (2002): "SIP: Session Initiation Protocol". [24] IETF RFC 3264 (2002): "An Offer/Answer Model with Session Description Protocol (SDP)". [25] IETF RFC 3323 (2002): "A Privacy Mechanism for the Session Initiation Protocol (SIP)". [26] ITU-T Recommendation T.38: "Procedures for real-time Group 3 facsimile communication over IP networks". [27] IETF RFC 4040 (2005): "RTP Payload Format for a 64 kbit/s Transparent Call". [28] IETF RFC 3966 (2004): "The tel URI for Telephone Numbers". [29] ETSI TS 129 163: "Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Interworking between the IP Multimedia (IM) Core Network (CN) subsystem and Circuit Switched (CS) networks (3GPP TS 29.163)". 3 Definitions and abbreviations For the purposes of the present document, the terms, definitions and abbreviations given in [1] apply. Endorsement notice The elements of ITU-T Recommendation Q.1912.5 [1] apply, with the following modifications: NOTE: Underlining and/or strike-out are used to highlight detailed modifications where necessary. Global modifications to ITU-T Recommendation Q.1912.5 Throughout the text of ITU-T Recommendation Q.1912.5 Replace references as shown below. Reference in ITU-T Recommendation Q.1912.5 [1] Modified reference ITU-T Recommendation Q.731.3 ITU-T Recommendation Q.731.3 as modified by EN 300 356-3 [4] ITU-T Recommendation Q.731.4 ITU-T Recommendation Q.731.4 as modified by EN 300 356-4 [5] ITU-T Recommendation Q.731.5 ITU-T Recommendation Q.731.5 as modified by EN 300 356-5 [6] ITU-T Recommendation Q.731.6 ITU-T Recommendation Q.731.6 as modified by EN 300 356-6 [7] ITU-T Recommendation Q.731.7 ITU-T Recommendation Q.731.7 as modified by EN 300 356-11 [12] ITU-T Recommendation Q.731.8 ITU-T Recommendation Q.731.8 as modified by EN 300 356-10 [11] ITU-T Recommendation Q.732.2 ITU-T Recommendation Q.732.2 as modified by EN 300 356-15 [15] ITU-T Recommendation Q.732.3 ITU-T Recommendation Q.732.3 as modified by EN 300 356-15 [15] ITU-T Recommendation Q.732.4 ITU-T Recommendation Q.732.4 as modified by EN 300 356-15 [15] ITU-T Recommendation Q.732.5 ITU-T Recommendation Q.732.5 as modified by EN 300 356-15 [15] ITU-T Recommendation Q.732.7 ITU-T Recommendation Q.732.7 as modified by EN 300 356-14 [14] SIST EN 383 001 V1.1.1:2006



ETSI ETSI EN 383 001 V1.1.1 (2006-06) 8
Reference in ITU-T Recommendation Q.1912.5 [1] Modified reference ITU-T Recommendation Q.733.1 ITU-T Recommendation Q.733.1 as modified by EN 300 356-17 [17] ITU-T Recommendation Q.733.2 ITU-T Recommendation Q.733.2 as modified by EN 300 356-16 [16] ITU-T Recommendation Q.733.3 ITU-T Recommendation Q.733.3 as modified by EN 300 356-18 [18] ITU-T Recommendation Q.733.4 ITU-T Recommendation Q.733.4 as modified by EN 300 356-7 [8] ITU-T Recommendation Q.733.5 ITU-T Recommendation Q.733.5 as modified by EN 300 356-20 [20] ITU-T Recommendation Q.734.1 ITU-T Recommendation Q.734.1 as modified by EN 300 356-12 [13] ITU-T Recommendation Q.734.2 ITU-T Recommendation Q.734.2 as modified by EN 300 356-19 [19] ITU-T Recommendation Q.735.1 ITU-T Recommendation Q.735.1 as modified by EN 300 356-9 [10] ITU-T Recommendation Q.737.1 ITU-T Recommendation Q.737.1 as modified by EN 300 356-8 [9] ITU-T Recommendation Q.761 ITU-T Recommendation Q.761 as modified by EN 300 356-1 [3] ITU-T Recommendation Q.762 ITU-T Recommendation Q.762 as modified by EN 300 356-1 [3] ITU-T Recommendation Q.763 ITU-T Recommendation Q.763 as modified by EN 300 356-1 [3] ITU-T Recommendation Q.764 ITU-T Recommendation Q.764 as modified by EN 300 356-1 [3] ITU-T Recommendation Q.850 ITU-T Recommendation Q.850 as modified by EN 300 485 [22] ITU-T Recommendation Q.1902.1 ITU-T Recommendation Q.1902.1 as modified by EN 302 213 [2] ITU-T Recommendation Q.1902.2 ITU-T Recommendation Q.1902.2 as modified by EN 302 213 [2] ITU-T Recommendation Q.1902.3 ITU-T Recommendation Q.1902.3 as modified by EN 302 213 [2] ITU-T Recommendation Q.1902.4 ITU-T Recommendation Q.1902.4 as modified by EN 302 213 [2] ITU-T Recommendation Q.1912.5 [1] ITU-T Recommendation Q.1912.5 [1] as modified by the present document IETF RFC 2806 IETF RFC 3966 [28]. NOTE: RFC 2806 is obsolete. RFC 3966 [28] replaces RFC 2806.
General Throughout the present document "should" is replaced by "shall". Clause 1 Modify 1st paragraph after Figure 2: ITU-T Supplement 45 to Q-series Recommendations (TRQ.2815) specifies the set of common capabilities supported by the interworking between SIP and BICC/ISUP for three different profiles (A, B, and C) in forms of Tables. Tables 1 and 2 of Supplement 45 (TRQ.2815) specify interworking capabilities for Profile A, Tables 3 and 4 specify interworking capabilities for Profile B, and Tables 5 and 6 specify interworking capabilities for Profile C (SIP-I), respectively.The details on the capabilities supported by the different profiles, and all profiles in common, are shown in clause C.1.1.2. NOTE: The profiles A,B and C are described within Annex C.1 Clause 5.3.3 Modify 1st paragraph: This Recommendation provides the interworking procedures for the case when overlap signalling is propagated into the SIP network and the case where overlap signalling is converted to en bloc signalling at the O-IWU. Additionally, procedures are outlined (in clause 6) to address situations where overlap signalling is received on the SIP side of the I-IWU. While this Recommendation covers procedures for propagating overlap signalling across the SIP network, it is recommended that SIP en bloc signalling is used, i.e. the use of overlap signalling within the SIP network should be avoided. Thus, the preferred scenario is to convert ISUP overlap signalling to SIP en bloc signalling at the O-IWU. Nevertheless, the decision regarding how to configure a particular IWU with respect to overlap signalling is a matter of local policy/network configuration. SIST EN 383 001 V1.1.1:2006



ETSI ETSI EN 383 001 V1.1.1 (2006-06) 9
Clause 6.1.3.1 Modify Table 3: Table 3/Q.1912.5 - Coding of the Called Party Number INVITE→→→→ IAM→→→→ Request-URI Called Party Number Odd/even indicator: set as required Nature of address indicator: Analyse the information contained in received URI with user=phone, and if it is in the format:- +CC NDC SN where CC is the country code of the network in which the next hop terminates, then set Nature of Address indicator to
0 0 0 0 0 1 1 "National (significant) number", remove "+CC" and use the remaining digits to fill the Address signals. +CC NDC SN where CC is not the country code of the network in which the next hop terminates, then set Nature of Address indicator to
0 0 0 0 1 0 0 "International number", remove "+" and use the remaining digits to fill the Address signals. Internal Network Number Indicator:
1 routing to internal network number not allowed
Numbering plan Indicator: 001 ISDN (Telephony) numbering plan (Rec. E.164) userinfo (sip: URI with user=phone)
Address Signals NOTE: RFC 3966 [28] describes the tel format of a userportion.
Clause 6.1.3.3 Modify 2nd paragraph: Other fields in the Nature of Connection Indicators should follow the current BICC/ISUP Recommendation. Clause 6.1.3.4 Replace 3rd and 4th paragraphs: For Profile A and B, the following mapping shall apply: indicator values in Table 5 should be set by the I-IWU as default in the FCI parameter: Table 5/Q.1912.5 - Default values for Forward Call Indicators Bits Codes Meaning D 1 "Interworking encountered". F 0 "ISDN user part/BICC not used all the way". HG 01 "ISDN user part/BICC not required all the way" I 0 "Originating access non-ISDN"
For Profile B, the appropriate values of the FCI parameter are determined based on analysis of various parameters (from signalling, internal states or configuration) at the I-IWU.
SIST EN 383 001 V1.1.1:2006



ETSI ETSI EN 383 001 V1.1.1 (2006-06) 10 Forward call indicators Bit A National/International call indicator 0 Call to be treated as a national call 1 Call to be treated as a international call bits CB End-to-end method indicator
0 0 no end-to-end method available (only link-by-link method available) bit D Interworking indicator
1
interworking encountered
As a network operator option, the value D = 0 "No interworking encountered" is used in case where the TMR = 64 kBit/s unrestricted is used.
NOTE: This will allow the DSS1 protocol at the S/T interface to avoid sending a Progress indicator with Progress information 0 0 0 0 0 0 1
[1]."Call is not end-to-end ISDN; further call progress information may be available in band ",, so the call will not be released for that reason at an ISDN terminal.
bit E End-to-end information indicator (national use)
0
no end-to-end information available bit F
ISDN user part/BICC indicator
0
ISDN user part/BICC not used all the way
As a network operator option, the value F = 1 "ISDN user part/BICC used all the way" is used in case where the TMR = 64 kBit/s unrestricted is used.
NOTE: This will allow the DSS1 protocol at the S/T interface to avoid sending a Progress indicator with Progress information 0 0 0 0 0 0 1
[1]. "Call is not end-to-end ISDN; further call progress information may be available in band ", so the call will not be released for that reason at an ISDN terminal.
bits HG ISDN user part/BICC preference indicator
0 1
ISDN user part/BICC not required all the way bit I
ISDN access indicator
0
originating access non-ISDN
As a network operator option, the value I = 1 "originating access ISDN" is used in case where the
TMR = 64 kBit/s unrestricted is used.
NOTE: This will allow the DSS1 protocol at the S/T interface to avoid sending a Progress indicator with Progress information 0 0 0 0 0 1 1
[3] "Originating access is non-ISDN", so the call will not be released for that reason at an ISDN terminal. bits KJ
SCCP method indicator
SIST EN 383 001 V1.1.1:2006



ETSI ETSI EN 383 001 V1.1.1 (2006-06) 11
0 0
no indication Clause 6.1.3.5 Modify title 6.1.3.5: 6.1.3.5 Transmission Medium Requirement (mandatory), User Service Information (optional), and Higher Layer
Compatibility information element within Access Transport Parameter (optional) Replace text of clause 6.1.3.5 by the following text: 6.1.3.5.1 Profile A In all instances the TMR parameter shall be set to the value "3.1 kHz audio", the USI and the Access Transport parameters shall not be sent. Transcoding shall be applied if required.
6.1.3.5.2 Profile B 6.1.3.5.2.1 I-IWU not acting as an International Gateway If transcoding is not supported at the I-IWU, and a SDP is received from the remote peer before the IAM is sent, then the TMR, USI and HLC shall be derived from SDP as described in clause 6.1.3.5.4. 6.1.3.5.2.2 I-IWU acting as an International Gateway If a SDP is received from the remote peer before the IAM is sent, then the TMR and HLC shall be derived from SDP as described in clause 6.1.3.5.4 below. NOTE: Only A-Law shall be supported. If the incoming call is an ISDN originated call and a G.711 codec is used, then the User Information Layer 1 Protocol indicator of the USI parameter shall be set in accordance with the encoding law of the subsequent BICC/ISUP network. If the incoming call is not an ISDN originated call, then the USI parameter shall not be sent. The offer-answer procedures for the G.711 codec are modified as follows: • If both G.711 A-law and -law codecs are received in the SDP offer, then independent from the received order of preference the G.711 A-law codec shall be returned in the SDP answer as the preferred codec. • If G.711 A-law codec is received in the SDP offer without -law codec, then the normal offer answer procedures apply. • If G.711
-law codec is received in the SDP offer without an A-law codec, then the -law codec shall be rejected. 6.1.3.5.3 Profile C (SIP-I) The TMR, USI and HLC, if present, shall be taken from the encapsulated ISUP to populate the associated ISUP parameters. Add clause 6.1.3.5.4 Transcoding not available at the I-IWU (Profile B only) The SDP Media Description Part received by the I-IWU should indicate only one media stream. If more than one media stream is indicated the following rules are valid: • based on operator policy the call can be refused with a 415 Unsupported media type response sent back; or • if the SDP offer contains one or more audio type media streams and one or more non-audio type media stream, only the audio streams shall be considered ; the other streams shall be rejected in accordance with the procedures of RFC 3264 [24]; and SIST EN 383 001 V1.1.1:2006



ETSI ETSI EN 383 001 V1.1.1 (2006-06) 12 • if the SDP offer contains several audio type media streams, the IWU shall only consider one, and reject the other streams in accordance with RFC 3264 [24].
SIST EN 383 001 V1.1.1:2006



ETSI ETSI EN 383 001 V1.1.1 (2006-06) 13 Modify Table 6: Table 6/Q.1912.5 - Coding of TMR/USI/HLC from SDP: SIP to BICC/ISUP
m= line
b= line (Note 4) a= line TMR parameter USI parameter (Note 1) HLC parameter :
NOTE: for of AS is evaluated to be B kbit/s. rtpmap: /[/] TMR codes Information Transport Capability User Information Layer 1 Protocol Indicator High Layer Characteristics Identification audio RTP/AVP 0 N/A or up to 64 kbit/s N/A "3.1kHz audio" "3.1kHz audio" "G.711 µ-law"
(Note 3) audio RTP/AVP Dynamic PT N/A or up to 64 kbit/s rtpmap: PCMU/8000 "3.1kHz audio" "3.1kHz audio" "G.711 µ-law"
(Note 3) audio RTP/AVP 8 N/A or up to 64 kbit/s N/A "3.1 kHz audio" "3.1 kHz audio" "G.711 Α-law" (Note 3) audio RTP/AVP Dynamic PT N/A or up to 64 kbit/s rtpmap: PCMA/8000 "3.1 kHz audio" "3.1 kHz audio" "G.711 A-law" (Note 3) audio RTP/AVP 9 AS:64 kbit/s rtpmap:9 G722/8000 "64 kbit/s unrestricted" "Unrestricted digital inf. w/tones/ann"
audio RTP/AVP Dynamic PT AS:64 kbit/s rtpmap: CLEARMODE/8000 (Note 2) "64 kbit/s unrestricted" "Unrestricted digital information"
image udptl t38 N/A or up to 64 kbit/s Based on T.38 [26] "3.1 kHz audio" "3.1 kHz audio"
"Facsímile Group 2/3" image tcptl t38 N/A or up to 64 kbit/s Based on T.38 [26] "3.1 kHz audio" "3.1 kHz audio"
"Facsímile Group 2/3" NOTE 1 - In this table the codec G.711 is used only as an example. Other codecs are is possible. NOTE 2 - CLEARMODE is specified in RFC 4040 [27].has not yet been standardized; and its usage is FFS
NOTE 3 - HLC is normally absent in this case. It is possible for HLC to be present with the value "Telephony", although 6.3.1/Q.939 indicates that this would normally be accompanied by a value of "Speech" for the Information Transfer Capability element. NOTE 4 - If the b=line indicates a bandwidth greater than 64kbit/s then the call may either use compression techniques or be rejected by returning a 415 response indicating only one media stream of 64kbit/s is supported.
SIST EN 383 001 V1.1.1:2006



ETSI ETSI EN 383 001 V1.1.1 (2006-06) 14 Clause 6.1.3.6 Modify the 3rd paragraph and then add a new paragraph as follows: ………….no additional interworking is needed for that parameter beyond the use of ISUP encapsulation. The contrary case is treated in the same way as for Profiles A and B.
If the address within the Calling Party Number or Generic Number after application of the mapping in this clause and processing by BICC/ISUP procedures is not the same as the respective value contained in the encapsulated ISUP, then the encapsulated ISUP address shall take precedence. NOTE: If the SIP address information has changed due to a SIP application elsewhere in the SIP domain and this is the address information that needs to be delivered to the called party, then it is assumed that the SIP application will have de-e
...