1、 International Telecommunication Union ITU-T H.248.70TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (03/2009) SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMSInfrastructure of audiovisual services Communication procedures Gateway control protocol: Dialling method information packages Recommendation ITU
2、-T H.248.70 ITU-T H-SERIES RECOMMENDATIONS AUDIOVISUAL AND MULTIMEDIA SYSTEMS CHARACTERISTICS OF VISUAL TELEPHONE SYSTEMS H.100H.199 INFRASTRUCTURE OF AUDIOVISUAL SERVICES General H.200H.219 Transmission multiplexing and synchronization H.220H.229 Systems aspects H.230H.239 Communication procedures
3、H.240H.259 Coding of moving video H.260H.279 Related systems aspects H.280H.299 Systems and terminal equipment for audiovisual services H.300H.349 Directory services architecture for audiovisual and multimedia services H.350H.359 Quality of service architecture for audiovisual and multimedia service
4、s H.360H.369 Supplementary services for multimedia H.450H.499 MOBILITY AND COLLABORATION PROCEDURES Overview of Mobility and Collaboration, definitions, protocols and procedures H.500H.509 Mobility for H-Series multimedia systems and services H.510H.519 Mobile multimedia collaboration applications a
5、nd services H.520H.529 Security for mobile multimedia systems and services H.530H.539 Security for mobile multimedia collaboration applications and services H.540H.549 Mobility interworking procedures H.550H.559Mobile multimedia collaboration inter-working procedures H.560H.569 BROADBAND, TRIPLE-PLA
6、Y AND ADVANCED MULTIMEDIA SERVICES Broadband multimedia services over VDSL H.610H.619 Advanced multimedia services and applications H.620H.629 IPTV MULTIMEDIA SERVICES AND APPLICATIONS FOR IPTV General aspects H.700H.719 IPTV terminal devices H.720H.729 IPTV middleware H.730H.739 IPTV application ev
7、ent handling H.740H.749 IPTV metadata H.750H.759 IPTV multimedia application frameworks H.760H.769 IPTV service discovery up to consumption H.770H.779 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T H.248.70 (03/2009) i Recommendation ITU-T H.248.70 Gateway control
8、 protocol: Dialling method information packages Summary Recommendation ITU-T H.248.70 defines three packages: dmi, xdmi and edmi, that extend the dd, xdd and edd packages, respectively. The new packages support a mechanism to provide information to the MGC regarding the dialling method (DTMF or deca
9、dic pulses) associated with the detected digit or digitmap. Source Recommendation ITU-T H.248.70 was approved on 16 March 2009 by ITU-T Study Group 16 (2009-2012) under Recommendation ITU-T A.8 procedure. ii Rec. ITU-T H.248.70 (03/2009) FOREWORD The International Telecommunication Union (ITU) is th
10、e United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Rec
11、ommendations 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 ITU-T study groups which, in turn, produce Recommendations on these topics. Th
12、e 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 collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Admin
13、istration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure e.g., interoperability or applicability) and com
14、pliance with the Recommendation is achieved when all of these mandatory provisions are met. The words “shall“ or some other obligatory language such as “must“ and the negative equivalents are used to express requirements. The use of such words does not suggest that compliance with the Recommendation
15、 is required of any party. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation 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
16、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, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommenda
17、tion. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2009 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, with
18、out the prior written permission of ITU. Rec. ITU-T H.248.70 (03/2009) iii CONTENTS Page 1 Scope 1 2 References. 2 3 Definitions 2 4 Abbreviations and acronyms 2 5 Conventions 2 6 Dialling method information package 2 6.1 Properties 2 6.2 Events . 3 6.3 Signals 3 6.4 Statistics 3 6.5 Error Codes. 3
19、6.6 Procedures 4 7 Dial method information package for extended digitmap detection 4 7.1 Properties 4 7.2 Events . 4 7.3 Signals 5 7.4 Statistics 5 7.5 Error Codes. 5 7.6 Procedures 5 8 Dial method information package for enhanced digitmap detection 5 8.1 Properties 6 8.2 Events . 6 8.3 Signals 6 8.
20、4 Statistics 7 8.5 Error Codes. 7 8.6 Procedures 7 Bibliography. 8 Rec. ITU-T H.248.70 (03/2009) 1 Recommendation ITU-T H.248.70 Gateway control protocol: Dialling method information packages 1 Scope This Recommendation defines three packages: dmi, xdmi and edmi, that extend the dd, xdd and edd pack
21、ages, respectively. The new packages support a mechanism to provide information to the MGC regarding the dialling method (DTMF or decadic pulses) associated with the detected digit or digitmap. The DTMF detection packages dd, xdd and edd are commonly used to not only detect DTMF digits but also deca
22、dic pulsed (i.e., loop disconnect) digits. Figure 1 shows an interworking scenario between legacy terminals and an H.323 network b-ITU-T H.323. AGWMGCH.323Legacy User Equipment(terminals, PBXs)Figure 1 Interworking between legacy equipment and a H.323 network b-ITU-T H.323 In the scenario of Figure
23、1, when a call is established and has reached the speech phase, the media gateway controller (MGC) may order the access gateway (AGW) to start DTMF detection (e.g., due to a H.323 application). This is in order to transfer “in-band“ digits to the H.323 network. Digits can be conveyed in the control
24、plane toward the H.323 network via the H.245 UserInputIndication message b-ITU-T H.245. In some scenarios, the dialling method by which the detected digit was generated is of relevance to the MGC. For example: If a DMTF digit 1 is received, the MG will report it correctly (i.e., with the dd/d1 event
25、). However, if loop disconnect (LD) dialling is used on the line, a problem may occur if the PSTN user signals a REGISTER RECALL pulsed signal to initiate an enquiry call. In some markets, the duration of the REGISTER RECALL pulsed signal overlaps with that of LD digit 1. Therefore, the AGW would re
26、port the signal as being “Digit 1“ rather than RECALL/HOOKFLASH which results in incorrect call behaviour. This Recommendation defines extension packages that allow a MGC to determine the dialling method associated with a detected digit. 2 Rec. ITU-T H.248.70 (03/2009) 2 References The following ITU
27、-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject to revision; users of this Recommendatio
28、n are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. The reference to a document within this Recommendation does not give it,
29、 as a stand-alone document, the status of a Recommendation. ITU-T H.248.1 Recommendation ITU-T H.248.1 (2005), Gateway control protocol: Version 3. ITU-T H.248.16 Recommendation ITU-T H.248.16 (2002), Gateway control protocol: Enhanced digit collection packages and procedures. 3 Definitions None. 4
30、Abbreviations and acronyms This Recommendation uses the following abbreviations and acronyms: AGW Access Gateway DTMF Dual-Tone Multi-Frequency LD Loop Disconnect MG Media Gateway MGC Media Gateway Controller PBX Private Branch Exchange PSTN Public Switched Telecommunications Network 5 Conventions N
31、one. 6 Dialling method information package Package Name: Digit Dialling Method Information Package ID: dmi (0x00f2) Description: This package defines an event parameter that may be used by all DTMF Detection Package events ITU-T H.248.1. This parameter allows the MGC to determine whether a detected
32、digit reported by the MG was generated with DTMF or with decadic pulses (i.e., loop disconnect). Version: 1 Extends: dd (0x0006) version 2 6.1 Properties None. Rec. ITU-T H.248.70 (03/2009) 3 6.2 Events This package does not define any new event. The event parameter defined in this package can be us
33、ed with any of the events of the base package i.e., dmi/std, dmi/etd, dmi/ltd, dmi/d0, dmi/d1, dmi/d2, dmi/d3, dmi/d4, dmi/d5, dmi/d6, dmi/d7, dmi/d8, dmi/d9, dmi/da, dmi/db, dmi/dc, dmi/dd, dmi/ds, dmi/do, dmi/ce. 6.2.1 EventsDescriptor parameters 6.2.1.1 Dialling method required Parameter Name: Di
34、alling Method Required Parameter ID: dmr (0x00a0) Description: Indicates that the MGC requires to be informed of the dialling type associated with the digits to be reported. Type: Boolean Optional: Yes Possible values: “ON“: Report dialling method. “OFF“: Do not report dialling method. Default: “OFF
35、“ 6.2.2 ObservedEventsDescriptor parameters 6.2.2.1 Dialling method Parameter Name: Dialling Method Parameter ID: dm (0x00a0) Description: Indicates the dialling method associated with the reported dialled digits. Type: Enumeration Optional: Yes Possible values: “DTMF“ (0x0001) Digit was generated w
36、ith DTMF. “LD“ (0x0002) Digit was generated with decadic pulses (i.e., loop disconnect). Default: “DTMF“ 6.3 Signals None. 6.4 Statistics None. 6.5 Error Codes None. 4 Rec. ITU-T H.248.70 (03/2009) 6.6 Procedures If the MGC wishes to be informed of the dialling method, it shall include the Dialling
37、Method Required event parameter set to ON in any of the following events: dmi/std, dmi/etd, dmi/ltd, dmi/d0, dmi/d1, dmi/d2, dmi/d3, dmi/d4, dmi/d5, dmi/d6, dmi/d7, dmi/d8, dmi/d9, dmi/da, dmi/db, dmi/dc, dmi/dd, dmi/ds, dmi/do, dmi/ce. If this event parameter is set to ON and the digit was dialled
38、with decadic pulses, the MG shall include the Dialling Method parameter when notifying the event to the MGC. If the Dialling Method Required event parameter is set to ON and the digit was dialled with DTMF, the MG does not need to, but is allowed to, include the Dialling Method parameter when notify
39、ing the event to the MGC. If the Dialling Method Required event parameter is set to OFF or is not included, the MG shall not include the Dialling Method parameter when notifying the event to the MGC, regardless of which method the digit was dialled with. On being informed of the type of digit transm
40、ission/detection, the MGC can correctly interpret the received digit based on the current call state. 7 Dial method information package for extended digitmap detection Package Name: Digit Dialling Method Information for Extended Digitmap Detection Package ID: xdmi (0x00f3) Description: This package
41、defines an event parameter that may be used by all the extended DTMF detection package events ITU-T H.248.16. This parameter allows the MGC to determine whether a detected digit reported by the MG was generated with DTMF or with decadic pulses (i.e., loop disconnect). Version: 1 Extends: xdd (0x0052
42、) version 1 7.1 Properties None. 7.2 Events This package does not define any new event. The event parameter defined in this package can be used with any of the events of the base package, i.e., xdmi/std, xdmi/etd, xdmi/ltd, xdmi/d0, xdmi/d1, xdmi/d2, xdmi/d3, xdmi/d4, xdmi/d5, xdmi/d6, xdmi/d7, xdmi
43、/d8, xdmi/d9, xdmi/da, xdmi/db, xdmi/dc, xdmi/dd, xdmi/ds, xdmi/do, xdmi/ce, xdmi/xce. 7.2.1 EventsDescriptor parameters 7.2.1.1 Dialling method required Parameter Name: Dialling Method Required Parameter ID: dmr (0x00a0) Description: Indicates that the MGC requires to be informed of the dialling me
44、thod associated with the digits to be reported. Type: Boolean Optional: Yes Rec. ITU-T H.248.70 (03/2009) 5 Possible values: “ON“: Report dialling method. “OFF“: Do not report dialling method. Default: “OFF“ 7.2.2 ObservedEventsDescriptor parameters 7.2.2.1 Dialling method Parameter Name: Dialling M
45、ethod Parameter ID: dm (0x00a0) Description: Indicates the dialling method associated with the reported dialled digits. Type: Enumeration Optional: Yes Possible values: “DTMF“ (0x0001) Digit was generated with DTMF. “LD“ (0x0002) Digit was generated with decadic pulses (i.e., loop disconnect). Defau
46、lt: “DTMF“ 7.3 Signals None. 7.4 Statistics None. 7.5 Error Codes None. 7.6 Procedures If the MGC wishes to be informed of the dialling method, it shall include the Dialling Method Required event parameter set to ON in any of the following events: xdmi/std, xdmi/etd, xdmi/ltd, xdmi/d0, xdmi/d1, xdmi
47、/d2, xdmi/d3, xdmi/d4, xdmi/d5, xdmi/d6, xdmi/d7, xdmi/d8, xdmi/d9, xdmi/da, xdmi/db, xdmi/dc, xdmi/dd, xdmi/ds, xdmi/do, xdmi/ce, xdmi/xce. If this event parameter is set to ON and the digit was dialled with decadic pulses, the MG shall include the Dialling Method parameter when notifying the event
48、 to the MGC. If the Dialling Method Required event parameter is set to ON and the digit was dialled with DTMF, the MG does not need to, but is allowed to, include the Dialling Method parameter when notifying the event to the MGC. If the Dialling Method Required event parameter is set to OFF or is no
49、t included, the MG shall not include the Dialling Method parameter when notifying the event to the MGC, regardless of which method the digit was dialled with. On being informed of the type of digit transmission/detection, the MGC can correctly interpret the received digit based on the current call state. 8 Dial method information package for enhanced digitmap detection Package Name: Digit Dialling Method Information for Enhanced Digitmap Detection Package ID: edmi (0x00f4) 6 Rec. ITU-T H.248.70 (03/2009) Description: Th
