1、 INTERNATIONAL TELECOMMUNICATION UNION ITU-T H.248.24TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (07/2003) SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMSInfrastructure of audiovisual services Communication procedures Gateway control protocol: Multi-frequency tone generation and detection packages
2、ITU-T Recommendation H.248.24 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 Communi
3、cation procedures 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.399 SUPPLEMENTARY SERVICES FOR MULTIMEDIA H.450H.499 MOBILITY AND COLLABORATION PROCEDURES Overview of Mobility and Collaboration, definiti
4、ons, protocols and procedures H.500H.509 Mobility for H-Series multimedia systems and services H.510H.519 Mobile multimedia collaboration applications and services H.520H.529 Security for mobile multimedia systems and services H.530H.539 Security for mobile multimedia collaboration applications and
5、services H.540H.549 Mobility interworking procedures H.550H.559 Mobile multimedia collaboration inter-working procedures H.560H.569 BROADBAND AND TRIPLE-PLAY MULTIMEDIA SERVICES Broadband multimedia services over VDSL H.610H.619 For further details, please refer to the list of ITU-T Recommendations.
6、 ITU-T Rec. H.248.24 (07/2003) i ITU-T Recommendation H.248.24 Gateway control protocol: Multi-frequency tone generation and detection package Summary This Recommendation defines two packages that provide multi-frequency tone generation and detection capabilities for H.248. Source ITU-T Recommendati
7、on H.248.24 was approved by ITU-T Study Group 16 (2001-2004) under ITU-T Recommendation A.8 procedure on 14 July 2003. ii ITU-T Rec. H.248.24 (07/2003) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Teleco
8、mmunication Standardization Sector (ITU-T) is a permanent organ of ITU. 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. The World Telecommunication Standardization As
9、sembly (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. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology w
10、hich fall within ITU-Ts purview, the necessary standards are prepared on a collaborative 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. Compliance with
11、 this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure e.g. interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words “shall“ or some other obligatory lan
12、guage 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 is required of any party. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this
13、 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 the date
14、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 consult t
15、he 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. H.248.24 (07/2003) iii CONTENTS Page 1 Scope 1 2 References. 1 2.1 Normative Reference 1 2.2 Informative References 1
16、3 Definitions 1 4 Abbreviations 1 5 Multi-frequency tone generation package 1 5.1 Properties 1 5.2 Events . 2 5.3 Signals 2 5.4 Statistics 2 5.5 Procedures 2 6 Multi-frequency tone detection package 3 6.1 Properties 3 6.2 Events . 3 6.3 Signals 4 6.4 Statistics 4 6.5 Procedures 4 ITU-T Rec. H.248.24
17、 (07/2003) 1 ITU-T Recommendation H.248.24 Gateway control protocol: Multi-frequency tone generation and detection packages 1 Scope This Recommendation defines two packages that provide multi-frequency tone generation and detection capabilities for H.248. The support of these packages is optional. 2
18、 References The following ITU-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
19、; all users of this Recommendation 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
20、 Recommendation does not give it, as a stand-alone document, the status of a Recommendation. 2.1 Normative Reference ITU-T Recommendation H.248.1 (2002), Gateway Control Protocol: Version 2. 2.2 Informative References ITU-T Recommendation Q.320 (1988), Signal code for register signalling. ITU-T Reco
21、mmendation Q.441 (1988), Signalling Code. 3 Definitions None. 4 Abbreviations This Recommendation uses the following abbreviations: MF Multi-Frequency MG Media Gateway MGC Media Gateway Controller 5 Multi-frequency tone generation package PackageID: mfg (0x003d) Version: 1 Extends: tonegen (0x0003)
22、version 1 This package defines the basic MF tones as signals and extends the allowed values of parameter tl of playtone in tonegen. 5.1 Properties None. 2 ITU-T Rec. H.248.24 (07/2003) 5.2 Events None. 5.3 Signals 5.3.1 MF signal code 0 SignalID: mf0 (0x0050) Generate MF signal code 0. The character
23、istics of the MF signal code, including frequencies and durations, are provisioned on the MG. Signal Type: Brief Duration: Provisioned Additional parameters: None Additional Values: mf0 (0x0050) is defined as a toneid for playtone. The other MF signal codes are specified in exactly the same way. A t
24、able with all signal names and signal Ids is included below. Note that each mf signal code is defined as both a signal and a toneid, thus extending the basic tone generation package. Also note that mf signal Ids are different from the names used in a digit map. Signal Name Signal ID/tone id mf signa
25、l code 0 mf0 (0x0050) mf signal code 1 mf1 (0x0051) mf signal code 2 mf2 (0x0052) mf signal code 3 mf3 (0x0053) mf signal code 4 mf4 (0x0054) mf signal code 5 mf5 (0x0055) mf signal code 6 mf6 (0x0056) mf signal code 7 mf7 (0x0057) mf signal code 8 mf8 (0x0058) mf signal code 9 mf9 (0x0059) mf signa
26、l code KP mfa (0x005a) mf signal code KP mfb (0x005b) mf signal code KP mfc (0x005c) mf signal code KP mfd (0x005d) mf signal code ST mfe (0x005e) mf signal code ST mff (0x005f) mf signal code ST mfg (0x0060) mf signal code ST mfh (0x0061) 5.4 Statistics None. 5.5 Procedures None. ITU-T Rec. H.248.2
27、4 (07/2003) 3 6 Multi-frequency tone detection package PackageID: mfd (0x003e) Version: 1 Extends: tonedet (0x0004) version 1 This package defines the events required for basic MF tone detection. This package extends the possible values of tone id in the “start tone detected“, “end tone detected“ an
28、d “long tone detected“ events. 6.1 Properties None. 6.2 Events 6.2.1 MF signal code 0 EventID: mf0 (0x0050) Detect MF signal code 0. The characteristics of the MF signal code, including frequencies and durations, are provisioned on the MG. EventsDescriptor Parameters: None ObservedEventsDescriptor P
29、arameters: None Additional Values: The events for the other MF signal codes are specified in exactly the same way. A table with all event names, event Ids and digit map symbols is included below. The event Ids are defined with same names as the signal Ids in package mfg. The additional tone id value
30、s are the same tone id values defined in package mfg. Signal Name Signal ID/tone id Digitmap Symbol mf signal code 0 mf0 (0x0050) 0 mf signal code 1 mf1 (0x0051) 1 mf signal code 2 mf2 (0x0052) 2 mf signal code 3 mf3 (0x0053) 3 mf signal code 4 mf4 (0x0054) 4 mf signal code 5 mf5 (0x0055) 5 mf signa
31、l code 6 mf6 (0x0056) 6 mf signal code 7 mf7 (0x0057) 7 mf signal code 8 mf8 (0x0058) 8 mf signal code 9 mf9 (0x0059) 9 mf signal code KP mfa (0x005a) A or a mf signal code KP mfb (0x005b) B or b mf signal code KP mfc (0x005c) C or c mf signal code KP mfd (0x005d) D or d mf signal code ST mfe (0x005
32、e) E or e mf signal code ST mff (0x005f) F or f mf signal code ST mfg (0x0060) G or g mf signal code ST mfh (0x0061) H or h 4 ITU-T Rec. H.248.24 (07/2003) 6.2.2 Digitmap completion event EventID: ce (0x0004) Generated when a digit map completes. EventsDescriptor parameters: Digit map processing is
33、activated only if a digit map parameter is present, specifying a digit map by name or by value. ObservedEventsDescriptor parameters: Digit String ParameterID: ds (0x0001) Type: string Possible values: A sequence of characters 0 through 9, A through H, and the long duration modifier Z, and the interd
34、igit threshold timers T, S and L. Description: The collected address string which matched part or all of an alternative event sequence specified in the digit map. Termination Method ParameterID: meth (0x0002) Type: enumeration Possible values: “UM“ (0x0001) Unambiguous match “PM“ (0x0002) Partial ma
35、tch, completion by timer expiry or unmatched event “FM“ (0x0003) Full match, completion by timer expiry or unmatched event Description: Indicates the reason for generation of the event. 6.3 Signals None. 6.4 Statistics None. 6.5 Procedures None. Printed in Switzerland Geneva, 2003 SERIES OF ITU-T RE
36、COMMENDATIONS Series A Organization of the work of ITU-T Series B Means of expression: definitions, symbols, classification Series C General telecommunication statistics Series D General tariff principles Series E Overall network operation, telephone service, service operation and human factors Seri
37、es F Non-telephone telecommunication services Series G Transmission systems and media, digital systems and networks Series H Audiovisual and multimedia systems Series I Integrated services digital network Series J Cable networks and transmission of television, sound programme and other multimedia si
38、gnals Series K Protection against interference Series L Construction, installation and protection of cables and other elements of outside plant Series M TMN and network maintenance: international transmission systems, telephone circuits, telegraphy, facsimile and leased circuits Series N Maintenance
39、: international sound programme and television transmission circuits Series O Specifications of measuring equipment Series P Telephone transmission quality, telephone installations, local line networks Series Q Switching and signalling Series R Telegraph transmission Series S Telegraph services term
40、inal equipment Series T Terminals for telematic services Series U Telegraph switching Series V Data communication over the telephone network Series X Data networks and open system communications Series Y Global information infrastructure and Internet protocol aspects Series Z Languages and general software aspects for telecommunication systems
