1、 - STD-ITU-T RECMN 8.957-L-ENGL 2996 4862572 Ob33440 O23 = INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Q.957.1 SERIES Q: SWITCHING AND SIGNALLING Digital subscriber Signalling System No. I - Stage 3 description for supplementary services using DSS 1 (0
2、7196) Stage 3 description for additional information transfer supplementary services using DSS I : User-to-User Signalling (UUS) ITU-T Recommendation Q.957.1 (Previously CCITT Recommendation) ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE FUNCT
3、IONS AND INFORMATION FLOWS FOR SERVICES IN THE ISDN SPECIFICATIONS OF SIGNALLING SYSTEMS No. 4 AND No. 5 SPECIFICATIONS OF SIGNALLING SYSTEM No. 6 SPECIFICATIONS OF SIGNALLING SYSTEM RI SPECIFICATIONS OF SIGNALLING SYSTEM R2 DIGITAL EXCHANGES INTERWORKING OF SIGNALLING SYSTEMS SPECIFICATIONS OF SIGN
4、ALLING SYSTEM No. 7 DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. I INTERNATIONAL AUTOMATIC AND SEMI-AUTOMATIC WORKING CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS General Data link layer Network layer User-network management - Stage 3 description for supplementary services using DSS 1 PUBLIC LAND MOBILE
5、 NETWORK INTERWORKING WITH SATELLITE MOBILE SYSTEMS INTELLIGENT NETWORK BROADBAND ISDN Q.1-Q.3 Q.4-Q. 59 Q.60-Q.99 Q.100-(2.119 Q. 1 204.249 Q.250-(2.309 Q.310-(2.399 Q.400-Q.499 Q.500-Q.599 Q.600-Q.699 Q ,700-Q. 849 Q. 85-Q .999 Q .850-Q .9 1 9 Q. 920-Q.929 Q .930-Q.939 Q. 940-Q. 949 Q.95-Q.999 Q.
6、1000-Q. 1 O99 Q.1100-Q.1199 Q. 120O-Q.1999 Q.2000-Q.2999 I1 For further details, please rejr to ITU-T List of Recommendations. I STDSITU-T RECMN Q.757.L-ENGL L77b qBb2i7L b33442 9Tb D 1TU-T RECOMMENDATION 0.957.1 STAGE 3 DESCRIPTION FOR ADDITIONAL INFORMATION TRANSFER SUPPLEMENTARY SERVICES USING DS
7、S 1: USER-TO-USER SIGNALLING (UUS) Summary The User-to-User Signalling (UUS) supplementary service allows an ISDN user to sendreceive a limited amount of information to/from another ISDN user over the signalling channel in association with a call to the other ISDN user. Source ITU-T Recommendation Q
8、.957.1 was revised by ITU-T Study Group 11 (1993-1996) and was approved under the WTSC Resolution No. 1 procedure on the 9th of July 1996. STD-ITU-T RECMN Q.957-1-ENGL 177b W 48b2571 Ob33443 832 FOREWORD IT (International Telecommunication Union) is the United Nations Specialized Agency in the field
9、 of telecommunications. The IT Telecommunication Standardization Sector (ITU-T) is a permanent organ of the ITU. The ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis, T
10、he World Telecommunication Standardization Conference (WTSC), which meets every four years, establishes the topics for study by the IT-T Study Groups which, in their turn, produce Recommendations on these topics. The approval of Recommendations by the Members of the ITU-T is covered by the procedure
11、 laid down in WTSC Resolution No. 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with IS0 and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telec
12、ommunication administration and a recognized operating agency. INTELLECTUAL PROPERTY RIGHTS The IT draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. The ITU takes no position concerning the evid
13、ence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, the ITU had/had not received notice of intellectual property, protected by patents,
14、 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 consult the TSB patent database. O ITU 1997 All rights reserved. No part of this publication may be reproduced or utiliz
15、ed in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the ITU. , 11 Recommendation 4.957.1 (07/96) 1 1.1 1.2 1.3 1.4 1.5 1.6 CONTENTS User-to-User Signalling (UUS) Definition Description . 1.2.1 General descnption 1.2.2 Spe
16、cific terminology . 1.2.3 Qualifications on the applicability to telecommunications services . 1.2.4 State definitions . Operational requirements . 1.3.1 Provisiodwithdrawal 1.3.2 Requirements on the originating network side 1.3.3 Requirements in the network . 1.3.4 1.3.5 Assumptions made about the
17、terminal Coding requirements 1.4.1 Messages . 1.4.2 Codesets 1.4.3 Information elements . 1.4.4 Codepoints . Signalling requirements 1 . 5.1 Activatioddeactivatiodregistration 1.5.2 Invocation and operation . Interaction with other supplementary services . Requirements on the terminating network sid
18、e . 1.6.1 1.6.2 1.6.3 1.6.4 1.6.5 1.6.6 1.6.7 1.6.8 1.6.9 1.6.10 1.6.11 1.6.12 1.6.13 1.6.14 1.6.15 Call Waiting Call Transfer Connected Line Identification Presentation Connected Line Identification Restriction Calling Line Identification Presentation . Calling Line Identification Restriction Close
19、d User Group Conference Calling Direct-Dialling-In Call diversion (call forwarding) services Line Hunting . Three-Party Service . User-to-User Signalling . Multiple Subscriber Number . Call Hold . Recommendation Q.957.1 (07/96) Page 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 7 7 7 9 9 10 18 18 18 19 19 19 19 19
20、19 19 19 25 25 26 26 26 . 111 STD-ITU-T RECMN Q-957-L-ENGL L99b m Lib259L Db33445 bD5 D 1.6.16 Advice of Charge . 1.6.1 7 Sub-addressing 1.6.18 Terminal Portability 1.6.19 Completion of Calls to Busy Subscriber . 1.6.20 Malicious Call Identification . 1.6.2 1 Reverse Charging 1.6.22 Multi-Level Prec
21、edence and Preemption Interactions with other networks 1.7.1 Interaction with non-ISDNs 1.7.2 Procedures for interworking with private ISDNs 1.7 1.8 Signalling flow . 1.9 Parameter values (timers) . Dynamic description (SDLs) 1.1 O References Page 26 26 26 27 27 27 27 27 27 28 28 28 28 28 iV Recomme
22、ndation 4.957.1 (07/96) Recommendation Q.957.1 STAGE 3 DESCRIPTION FOR ADDITIONAL INFORMATION TRANSFER (revised in 1996) SUPPLEMENTARY SERVICES USING DSS 1 : USER-TO-USER SIGNALLING (UUS) 1 User-to-User Signalling JUS) 1.1 Definition The user-to-user signalling (UUS) supplementary service allows an
23、ISDN user to sendreceive a limited amount of information tofrom another ISDN user over the signalling channel in association with a call to the other ISDN user. 1.2 Description 1.2.1 General description The US supplementary services provide a means of communication between two users by using as a ba
24、sis the layer 3 protocol defined in clause 514.93 1 11. User-to-user signalling is used to exchange information between two users to provide the services described in the Stage 1 Service Description. The exchange of user-to-user signalling is limited by flow control procedures provided by the networ
25、k or the user. The exchange of user-to-user information is not a network acknowledged service. Any acknowledgement procedure shall be controlled at a higher layer between users. Three WS services associated with circuit-switched calls that may be provided by the network to users are: i service I - U
26、ser-to-user information exchanged during the setup and clearing phases of a call, by transporting User-to-user information element within 4.93 1 11 call control messages; service 2 - User-to-user information exchanged fiom the senders point of view during call establishment, between the ALERTING and
27、 CONNECT messages, within USER INFORMATION messages; and iii) service 3 - User-to-user information exchanged while a call is in the Active state, within USER INFORMATION messages. All three services may be used separately or in any combination in association with a single call. As an option, at call
28、 setup, users may be able to speciQ that the requested user-to-user signalling service(s) is (are) required for the call, i.e. the call should not be completed if user-to-user information cannot be passed. ii) 1.2.2 Specific terminology The user is the DSS 1 protocol entity at the user side of the u
29、ser-network interface. The network is the DSS 1 protocol entity at the network side of the user-network interface. The called user is the user who is offered an incoming call at the terminating interface. The calling user is the user who initiates an outgoing cai1 at the originating interface. The s
30、erved user is the user requesting the User-to-User (UUS) supplementary service. 1 Recommendation Q.957.1 (07/96) STD-ITU-T RECMN Q-757.1-ENGL 177b 9 48b2571 0b334L17 488 9 The invoke component is defined in Recommendation Q.932 2. 1.2.3 See Recommendation 1.257.1 3. Qualifications on the applicabili
31、ty to telecommunications services 1.2.4 State definitions The states associated with basic call control according to Recommendation Q.93 1 13 are applicable. 1.3 Operational requirements 1.3.1 Provision/withdrawal UUS services 1 and 2 must be subscribed to by the calling user. UUS service 3 must be
32、subscribed to by the served user. Whether these component services are offered to the user as separate supplementary or in any particular combination is a service provider option. 1.3.2 The basic call control procedures according to 5.1/Q.93 1 i are applicable. Requirements on the originating networ
33、k side 1.3.3 Requirements in the network Not applicable to DSS 1. 1.3.4 The basic call control procedures according to 5.2/Q.93 1 i are applicable. Requirements on the terminating network side 1.3.5 Terminal equipment using UUS service 1 is expected to be able to generate and accept the User-to- use
34、r information element (see 4.5.30/Q.931 i) as described in 1.5.2.1 below. In the case of explicit activation, it is also expected to support the codings and procedures in 1.5.2.1. Terminal equipment using UUS service 2 is expected to be able to generate and/or accept USER INFORMATION messages contai
35、ning the User-to-user information element (see 4.5.30/Q.93 1 i) as described in 1.5.2.2.3 below. It is also expected to support the codings and procedures in 1.5.2.2. Terminal equipment using UUS service 3 is expected to be able to generate and/or accept USER INFORMATION messages containing the User
36、-to-user information element (see 4.5.30/Q.93 1 i) as described in 1.5.2.3.4 below. It is also expected to support the codings and procedures in 1.5.2.3 below. In the case that congestion control is used, it is also expected to support the CONGESTION CONTROL message and the Congestion level informat
37、ion element (see 4.5.14/Q.931 i I), and to comply with the procedures of 1.5.2.3.5 below. Assumptions made about the terminal 1.4 Coding requirements 1.4.1 Messages The following messages are applicable to service activation for services 1, 2 and 3 : SETUP, SETUP ACKNOWLEDGE, CALL PROCEEDING, PROGRE
38、SS, ALERTING, CONNECT, DISCONNECT, RELEASE, RELEASE COMPLETE. The FACILITY message is also applicable to the activation of service 3. The following messages are applicable to the operation of service 1: SETUP, ALERTING, CONNECT, DISCONNECT, RELEASE, RELEASE COMPLETE. 2 Recommendation 4.957.1 (07/96)
39、 The following message is applicable to the operation of services 2 and 3: USER INFORMATION. Where the congestion control procedures are used, the following message is applicable to service 3: CONGESTION CONTROL. The following are message contents for UUS services. Message Type: ALERTING Information
40、 element Protocol discriminator Call reference ALERTTNG Facility Message type = User-to-user Reference Direction Type Length 4.214.93 1 Both M 1 4.314.93 1 Both M 2- * 4.4Q.93 1 Both M 1 8.2.314.932 Both O (Note I) 19 4.5.30Q.93 1 Both O (Note 2) 2-13 1 Message Type: CALL PROCEEDING Information elem
41、ent Protocol discriminator Call reference PROCEEDING Facility Message type = CALL Reference Direction TY Pe Length 4.214.93 1 Both M 1 4.314.93 1 Both M 2-* 4.4Q.93 1 Both M I 8.2.314.93 2 Both O (Note 1) 19 NOTE 2 - Other mandatory and optional information elements per Recommendation Q.93 1. Inform
42、ation element Message Type: CONGESTION CONTROL Reference Direction Type Length M Protocol discriminator Call reference Message type = CONGESTION CONTROL Congestion level Cause M M M 4.2Q.93 1 N+U 4.3Q.93 1 N+U 4.4lQ.93 1 N+U 8.2.314.93 1 N+U 4.5.244.93 1 N+U I NOTE - Other optional information eleme
43、nts per Recommendation Q.93 1. 1 2-* 1 1 4-32 Recommendation 4.957.1 (07/96) 3 STD-ITU-T RECMN Q-757.1-ENGL 179b = 48b2571 Ob33449 250 = Information element Protocol discriminator Call reference Message type = CONNECT Facility User-to-user Message Type: CONNECT Reference Direction Type 4.214.93 1 Bo
44、th M 4.314.93 1 Both M 4.414.93 1 Both M 8.2.314.932 Both O (Note 1) 4.5.3014.93 1 Both O (Note 2) Reference 4.214.93 1 4.31Q.93 1 4.414.93 1 8.2.314.932 4.5.3014.93 1 Length I Direction TY Pe Length Both M 1 Both M 2-* Both M 1 Both O (Note 2) 19 Both O (Note 1) 2-131 1 2-* Information element Prot
45、ocol discriminator 1 for the call, and Reference Direction TY Pe Length 4.214.93 1 Both M 1 for service 3 activation during call establishment. May also be included for explicit service 1 activation when contention is not allowed for the call, if not present in the ALERTING message. Not otherwise in
46、cluded for UUS service. NOTE 2 -May be included for service 1 (explicit or implicit activation). Not included otherwise. NOTE 3 - Other mandatory and optional information elements per Recommendation Q.93 1. 4314.93 1 8.114.932 8.2.30lQ.932 Message Type: DISCONNECT Both M 2- * Both M 1 Both O (Note 1
47、) 19 Information element Protocol discriminator Call reference Message type = DISCONNECT Facility User-to-user I I NOTE 1 - May be included for UUS service 1 where DISCONNECT is the first clearing message. Not included otherwise. NOTE 2 - May be included to indicate explicit servicelacceptance or se
48、rvice 1,2 or 3 rejection. NOTE 3 - Other mandatory and optional information elements per Recommendation 4.93 1. Message Type: FACILITY Call reference Message type = FACILITY Facility I 1 NOTE 1 - Included for UUS service 3 activation or deactivation during a call. NOTE 2 - Other mandatory and option
49、al information elements per Recommendation Q.932. 4 Recommendation Q.957.1 (07/96) STD-ITU-T RECMN Q.957-L-ENGL L99b YBb259L b33450 T72 W Information element Protocol discriminator Call reference Message type = PROGRESS Facility User-to-user Message Type: PROGRESS Reference Direction TY Pe Length 4.214.93 1 Both M 1 4.31Q.93 1 Both M 2-* 4.414.93 I Both M 1 8.2.314.93 2 N+U O (Note 1) 19 4.5.3014.93 1 N+U O (Note 2) 2-13 1 User-to-user Message Type: RELEASE 4.5.30fQ.93 1 Both O (Note 1) 2-131 Information element Protocol discriminator C
