1、 INTERNATIONAL TELECOMMUNICATION UNION ITU-T Q.2764TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Amendment 1(12/2002) SERIES Q: SWITCHING AND SIGNALLING Broadband ISDN B-ISDN application protocols for the network signalling Signalling System No. 7 B-ISDN User Part (B-ISUP) Basic call procedures Am
2、endment 1: Support for the International Emergency Preference Scheme ITU-T Recommendation Q.2764 (1999) Amendment 1 ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE Q.1Q.3 INTERNATIONAL AUTOMATIC AND SEMI-AUTOMATIC WORKING Q.4Q.59 FUNCTIONS AND I
3、NFORMATION FLOWS FOR SERVICES IN THE ISDN Q.60Q.99 CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS Q.100Q.119 SPECIFICATIONS OF SIGNALLING SYSTEM No. 4 Q.120Q.139 SPECIFICATIONS OF SIGNALLING SYSTEM No. 5 Q.140Q.199 SPECIFICATIONS OF SIGNALLING SYSTEM No. 6 Q.250Q.309 SPECIFICATIONS OF SIGNALLING SYSTE
4、M R1 Q.310Q.399 SPECIFICATIONS OF SIGNALLING SYSTEM R2 Q.400Q.499 DIGITAL EXCHANGES Q.500Q.599 INTERWORKING OF SIGNALLING SYSTEMS Q.600Q.699 SPECIFICATIONS OF SIGNALLING SYSTEM No. 7 Q.700Q.799 Q3 INTERFACE Q.800Q.849 DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. 1 Q.850Q.999 PUBLIC LAND MOBILE NETWORK Q
5、1000Q.1099 INTERWORKING WITH SATELLITE MOBILE SYSTEMS Q.1100Q.1199 INTELLIGENT NETWORK Q.1200Q.1699 SIGNALLING REQUIREMENTS AND PROTOCOLS FOR IMT-2000 Q.1700Q.1799 SPECIFICATIONS OF SIGNALLING RELATED TO BEARER INDEPENDENT CALL CONTROL (BICC) Q.1900Q.1999 BROADBAND ISDN Q.2000Q.2999 General aspects
6、 Q.2000Q.2099 Signalling ATM adaptation layer (SAAL) Q.2100Q.2199 Signalling network protocols Q.2200Q.2299 Common aspects of B-ISDN application protocols for access signalling and network signalling and interworking Q.2600Q.2699 B-ISDN application protocols for the network signalling Q.2700Q.2899 B
7、ISDN application protocols for access signalling Q.2900Q.2999 For further details, please refer to the list of ITU-T Recommendations. ITU-T Rec. Q.2764 (1999)/Amd.1 (12/2002) i ITU-T Recommendation Q.2764 Signalling System No. 7 B-ISDN User Part (B-ISUP) Basic call procedures Amendment 1 Support fo
8、r the International Emergency Preference Scheme Summary This amendment was produced to meet the urgent need for the implementation of the International Emergency Preference Scheme (IEPS) as specified in ITU-T Rec. E.106. This amendment contains the modifications to ITU-T Rec. Q.2764 (12/99) in order
9、 to accommodate these needs. This amendment should be read in connection with the related amendments to ITU-T Recs Q.2761, Q.2762, and Q.2763. Source Amendment 1 to ITU-T Recommendation Q.2764 (1999) was prepared by ITU-T Study Group 11 (2001-2004) and approved under the WTSA Resolution 1 procedure
10、on 29 December 2002. ii ITU-T Rec. Q.2764 (1999)/Amd.1 (12/2002) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is respon
11、sible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the IT
12、U-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborativ
13、e basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementatio
14、n of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of
15、the date of approval of this Recommendation, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urged to
16、consult the TSB patent database. ITU 2003 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. ITU-T Rec. Q.2764 (1999)/Amd.1 (12/2002) iii CONTENTS Page 1) Clause 1.4 Abbreviations. 1 2) Clause 2.2.1.3.2 Other acti
17、ons at the exchange . 1 3) Clause 2.2.1.4.2 Other actions at the exchange . 1 4) Clause 2.2.1.5.2 Other actions at the exchange . 2 5) Clause 2.2.2.3.2 Other actions at the exchange . 2 6) Clause 2.2.2.4.2 Other actions at the exchange . 2 7) Clause 2.2.2.5.2 Other actions at the exchange . 3 8) Cla
18、use 2.2.3.3.2 Other actions at the exchange . 3 9) Clause 2.2.3.4.2 Other actions at the exchange . 3 10) Clause 2.2.3.5.2 Other actions at the exchange . 4 11) Clause 2.3.1 Lack of resources at the incoming side. 4 12) Clause 2.3.2 Lack of resources at the outgoing side 4 13) Clause 2.8.1 Lack of r
19、esources 4 14) Clause 2.15 Primitive contents 4 ITU-T Rec. Q.2764 (1999)/Amd.1 (12/2002) 1 ITU-T Recommendation Q.2764 Signalling System No. 7 B-ISDN User Part (B-ISUP) Basic call procedures Amendment 1 Support for the International Emergency Preference Scheme 1) Clause 1.4 Abbreviations Add the fol
20、lowing new abbreviation alphabetically: IEPS International Emergency Preference Scheme 2) Clause 2.2.1.3.2 Other actions at the exchange Add the following: e) International Emergency Preference Scheme If an outgoing international exchange receives information from the national network that the call
21、is to be treated as an IEPS call (e.g. CPC value of IEPS), call establishment proceeds with priority. The call is established with the CPC set as IEPS call marking in the Set_Up request primitive. Restrictive network management controls (e.g. Automatic Call Gapping, B-ISUP Signalling Congestion Cont
22、rol, Automatic Congestion Control, Hard-to-Reach procedure) are not applied to this call. If routing procedures fail to establish an outgoing call, the call is queued and shall take precedence over any other normal call attempts. Optionally, if queuing occurs, an early ACM (called party status set t
23、o “no indication“) with the inclusion of the generic notification parameter set to “call completion delay“ may be returned to the originating exchange. 3) Clause 2.2.1.4.2 Other actions at the exchange Add the following: e) International Emergency Preference Scheme If an intermediate international e
24、xchange receives a call with CPC set to IEPS, the call establishment proceeds with priority. The call is established with the CPC set as IEPS call marking in the Set_Up request primitive. Restrictive network management controls (e.g. Automatic Call Gapping, B-ISUP Signalling Congestion Control, Auto
25、matic Congestion Control, Hard-to-Reach procedure) are not applied to this call. If routing procedures fail to establish an outgoing call, the call is queued and shall take precedence over any other normal call attempts. Optionally, if queuing occurs, an early ACM (called party status set to “no ind
26、ication“) with the inclusion of the generic notification parameter set to “call completion delay“ may be returned to the originating exchange. 2 ITU-T Rec. Q.2764 (1999)/Amd.1 (12/2002) 4) Clause 2.2.1.5.2 Other actions at the exchange Add the following: e) International Emergency Preference Scheme
27、If an incoming international exchange receives a call with CPC set to IEPS, the call establishment proceeds with priority. The call is established with the CPC set as IEPS call marking or national specific information for IEPS call treatment in the Set_Up request primitive. Restrictive network manag
28、ement controls (e.g. Automatic Call Gapping, B-ISUP Signalling Congestion Control, Automatic Congestion Control, Hard-to-Reach procedure) are not applied to this call. If routing procedures fail to establish an outgoing call, the call is queued and shall take precedence over any other normal call at
29、tempts. Optionally, if queuing occurs, an early ACM (called party status set to “no indication“) with the inclusion of the generic notification parameter set to “call completion delay“ may be returned to the originating exchange. 5) Clause 2.2.2.3.2 Other actions at the exchange Add the following: e
30、) International Emergency Preference Scheme If an outgoing international exchange receives information from the national network that the call is to be treated as an IEPS call (e.g. CPC value of IEPS), call establishment proceeds with priority. The call is established with the CPC set as IEPS call m
31、arking in the Set_Up request primitive. Restrictive network management controls (e.g. Automatic Call Gapping, B-ISUP Signalling Congestion Control, Automatic Congestion Control, Hard-to-Reach procedure) are not applied to this call. If routing procedures fail to establish an outgoing call, the call
32、is queued and shall take precedence over any other normal call attempts. Optionally, if queuing occurs, an early ACM (called party status set to “no indication“) with the inclusion of the generic notification parameter set to “call completion delay“ may be returned to the originating exchange. 6) Cl
33、ause 2.2.2.4.2 Other actions at the exchange Add the following: e) International Emergency Preference Scheme If an intermediate international exchange receives a call with CPC set to IEPS, the call establishment proceeds with priority. The call is established with the CPC set as IEPS call marking in
34、 the Set_Up request primitive. Restrictive network management controls (e.g. Automatic Call Gapping, B-ISUP Signalling Congestion Control, Automatic Congestion Control, Hard-to-Reach procedure) are not applied to this call. If routing procedures fail to establish an outgoing call, the call is queued
35、 and shall take precedence over any other normal call attempts. Optionally, if queuing occurs, an early ACM (called party status set to “no indication“) with the inclusion of the generic notification parameter set to “call completion delay“ may be returned to the originating exchange. ITU-T Rec. Q.2
36、764 (1999)/Amd.1 (12/2002) 3 7) Clause 2.2.2.5.2 Other actions at the exchange Add the following: e) International Emergency Preference Scheme If an incoming international exchange receives a call with CPC set to IEPS, the call establishment proceeds with priority. The call is established with the C
37、PC set as IEPS call marking or national specific information for IEPS call treatment in the Set_Up request primitive. Restrictive network management controls (e.g. Automatic Call Gapping, B-ISUP Signalling Congestion Control, Automatic Congestion Control, Hard-to-Reach procedure) are not applied to
38、this call. If routing procedures fail to establish an outgoing call, the call is queued and shall take precedence over any other normal call attempts. Optionally, if queuing occurs, an early ACM (called party status set to “no indication“) with the inclusion of the generic notification parameter set
39、 to “call completion delay“ may be returned to the originating exchange. 8) Clause 2.2.3.3.2 Other actions at the exchange Add the following: e) International Emergency Preference Scheme If an outgoing international exchange receives information from the national network that the call is to be treat
40、ed as an IEPS call (e.g. CPC value of IEPS), call establishment proceeds with priority. The call is established with the CPC set as IEPS call marking in the Set_Up request primitive. Restrictive network management controls (e.g. Automatic Call Gapping, B-ISUP Signalling Congestion Control, Automatic
41、 Congestion Control, Hard-to-Reach procedure) are not applied to this call. If routing procedures fail to establish an outgoing call, the call is queued and shall take precedence over any other normal call attempts. Optionally, if queuing occurs, an early ACM (called party status set to “no indicati
42、on“) with the inclusion of the generic notification parameter set to “call completion delay“ may be returned to the originating exchange. 9) Clause 2.2.3.4.2 Other actions at the exchange Add the following: e) International Emergency Preference Scheme If an intermediate international exchange receiv
43、es a call with CPC set to IEPS, the call establishment proceeds with priority. The call is established with the CPC set as IEPS call marking in the Set_Up request primitive. Restrictive network management controls (e.g. Automatic Call Gapping, B-ISUP Signalling Congestion Control, Automatic Congesti
44、on Control, Hard-to-Reach procedure) are not applied to this call. If routing procedures fail to establish an outgoing call, the call is queued and shall take precedence over any other normal call attempts. Optionally, if queuing occurs, an early ACM (called party status set to “no indication“) with
45、 the inclusion of the generic notification parameter set to “call completion delay“ may be returned to the originating exchange. 4 ITU-T Rec. Q.2764 (1999)/Amd.1 (12/2002) 10) Clause 2.2.3.5.2 Other actions at the exchange Add the following: e) International Emergency Preference Scheme If an incomin
46、g international exchange receives a call with CPC set to IEPS, the call establishment proceeds with priority. The call is established with the CPC set as IEPS call marking or national specific information for IEPS call treatment in the Set_Up request primitive. Restrictive network management control
47、s (e.g. Automatic Call Gapping, B-ISUP Signalling Congestion Control, Automatic Congestion Control, Hard-to-Reach procedure) are not applied to this call. If routing procedures fail to establish an outgoing call, the call is queued and shall take precedence over any other normal call attempts. Optio
48、nally, if queuing occurs, an early ACM (called party status set to “no indication“) with the inclusion of the generic notification parameter set to “call completion delay“ may be returned to the originating exchange. 11) Clause 2.3.1 Lack of resources at the incoming side Add the following paragraph
49、 at the end of the clause: Lack of resources at the incoming side may prevent the determination by the exchange that this is an IEPS call attempt. Therefore, the call attempt would be released in the same manner as any other call attempt. Once the call attempt has been determined to be an IEPS call attempt, then it will be given preferential treatment. 12) Clause 2.3.2 Lack of resources at the outgoing side Add the following paragraph at the end of the clause: If, however, the outgoing call/connection is
