1、 INTERNATIONAL TELECOMMUNICATION UNION ITU-T H.248.27TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (07/2003) SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMSInfrastructure of audiovisual services Communication procedures Gateway control protocol: Supplemental tones packages ITU-T Recommendation H.248.
2、27 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 H.240H.25
3、9 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, definitions, protocols and procedur
4、es 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 services H.540H.549 Mobilit
5、y 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. ITU-T Rec. H.248.27 (07/20
6、03) i ITU-T Recommendation H.248.27 Gateway control protocol: Supplemental tones packages Summary This Recommendation defines three packages that provide conferencing, diagnostic and carrier services tones capabilities for H.248. Source ITU-T Recommendation H.248.27 was approved by ITU-T Study Group
7、 16 (2001-2004) under the ITU-T Recommendation A.8 procedure on 14 July 2003. ii ITU-T Rec. H.248.27 (07/2003) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T
8、) 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 Assembly (WTSA), which meets every four yea
9、rs, 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 which fall within ITU-Ts purview, the nece
10、ssary 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 this Recommendation is voluntary. Howeve
11、r, 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 language such as “must“ and the negative equ
12、ivalents 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 Recommendation may involve the use of a
13、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 of approval of this Recommendation, ITU h
14、ad 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 the TSB patent database. ITU 2003 All righ
15、ts reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. ITU-T Rec. H.248.27 (07/2003) iii CONTENTS Page 1 Scope 1 2 References. 1 3 Definitions 1 4 Abbreviations 1 5 Conferencing tones generation package . 1 5.1 Properties 1 5
16、.2 Events . 1 5.3 Signals 2 5.4 Statistics 5 5.5 Procedures 5 6 Diagnostic tones generation package 5 6.1 Properties 5 6.2 Events . 5 6.3 Signals 5 6.4 Statistics 9 6.5 Procedures 9 7 Carrier tones generation package 9 7.1 Properties 9 7.2 Events . 9 7.3 Signals 10 7.4 Statistics 12 7.5 Procedures 1
17、2 ITU-T Rec. H.248.27 (07/2003) 1 ITU-T Recommendation H.248.27 Gateway control protocol: Supplemental tones packages 1 Scope This Recommendation defines three packages that provide conferencing, diagnostic and carrier services tones capabilities for H.248. The support of these packages is optional.
18、 2 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 revisi
19、on; 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 R
20、ecommendation does not give it, as a stand-alone document, the status of a Recommendation. ITU-T Recommendation H.248.1 (2002), Gateway control protocol: Version 2. 3 Definitions None. 4 Abbreviations This Recommendation uses the following abbreviations: MG Media Gateway MGC Media Gateway Controller
21、 5 Conferencing tones generation package PackageID: conftn (0x0038) Version: 1 Extends: tonegen version 1 This package defines conferencing signals that indicate to the participants of a conference when: a caller has entered or leaves a conference; a conference is locked or unlocked; a time limit is
22、 about to expire. This package uses the term “tone“ which may be a tone for an audio stream or may be a still or moving image for a video stream, among other possible options. 5.1 Properties None. 5.2 Events None. 2 ITU-T Rec. H.248.27 (07/2003) 5.3 Signals 5.3.1 Conference entrance tone SignalID: e
23、nter (0x0061) Description: Generate conference entrance tone, which indicates that a new caller has joined the conference. The physical characteristics of the conference entrance tone are available in the gateway. Signal Type: Brief Duration: Provisioned Additional parameters: Tone Direction Paramet
24、erID: btd (0x0001) Type: Enumeration Possible values: External ext (0x0001), Internal int (0x0002), Both both (0x0003) Description: The tone direction indicates in which direction the signal shall proceed with respect to the centre of the context. “Internal“ denotes that the signal shall proceed tow
25、ard the centre of the context from the termination, while “external“ denotes that the signal shall proceed toward the edge of the context. “Both“ indicates that the signal shall proceed in both directions. Unspecified tone direction shall default to “external“. Note that using the playtone signal in
26、 package tonegen to generate this signal will prevent the capability to use the directionality parameter. The other signals in this package are specified in exactly the same way. A table with all signal names and signal IDs is included. Note that each signal is defined as both a signal and a toneid,
27、 thus extending the basic tone generation package. Signal name Signal ID/tone id Conf. Entrance Tone enter (0x0061) Conf. Exit Tone exit (0x0062) Conf. Lock Tone lock (0x0063) Conf. Unlock Tone unlock (0x0064) Time Limit Warning Tone timelim (0x0065) 5.3.2 Conference exit tone SignalID: exit (0x0062
28、) Description: Generate conference exit tone, which indicates that a conferee has left the conference. The physical characteristics of the conference exit tone are available in the gateway. ITU-T Rec. H.248.27 (07/2003) 3 Signal Type: Brief Duration: Provisioned Additional parameters: Tone Direction
29、 ParameterID: btd (0x0001) Type: Enumeration Possible values: External ext (0x0001), Internal int (0x0002), Both both (0x0003) Description: The tone direction indicates in which direction the signal shall proceed with respect to the centre of the context. “Internal“ denotes that the signal shall pro
30、ceed toward the centre of the context from the termination, while “external“ denotes that the signal shall proceed toward the edge of the context. “Both“ indicates that the signal shall proceed in both directions. Unspecified tone direction shall default to “external“. Note that using the playtone s
31、ignal in package tonegen to generate this signal will prevent the capability to use the directionality parameter. 5.3.3 Conference lock tone SignalID: lock (0x0063) Description: Generate conference lock tone, which indicates that the controller has blocked new callers from joining the conference. Th
32、e physical characteristics of the conference lock tone are available in the gateway. Signal Type: Brief Duration: Provisioned Additional parameters: Tone Direction ParameterID: btd (0x0001) Type: Enumeration Possible values: External ext (0x0001), Internal int (0x0002), Both both (0x0003) 4 ITU-T Re
33、c. H.248.27 (07/2003) Description: The tone direction indicates in which direction the signal shall proceed with respect to the centre of the context. “Internal“ denotes that the signal shall proceed toward the centre of the context from the termination, while “external“ denotes that the signal shal
34、l proceed toward the edge of the context. “Both“ indicates that the signal shall proceed in both directions. Unspecified tone direction shall default to “external“. Note that using the playtone signal in package tonegen to generate this signal will prevent the capability to use the directionality pa
35、rameter. 5.3.4 Conference unlock tone SignalID: unlock (0x0064) Description: Generate conference unlock tone, which indicates that the controller has allowed new callers to join the conference. The physical characteristics of conference unlock tone is available in the gateway. Signal Type: Brief Dur
36、ation: Provisioned Additional parameters: Tone Direction ParameterID: btd (0x0001) Type: Enumeration Possible values: External ext (0x0001), Internal int (0x0002), Both both (0x0003) Description: The tone direction indicates in which direction the signal shall proceed with respect to the centre of t
37、he context. “Internal“ denotes that the signal shall proceed toward the centre of the context from the termination, while “external“ denotes that the signal shall proceed toward the edge of the context. “Both“ indicates that the signal shall proceed in both directions. Unspecified tone direction sha
38、ll default to “external“. Note that using the playtone signal in package tonegen to generate this signal will prevent the capability to use the directionality parameter. 5.3.5 Time limit warning tone SignalID: timelim (0x0065) Description: Generates a time limit warning tone, which indicates that th
39、ere are only a few minutes remaining on the provisioned conference bridge. The physical characteristics of the time limit warning tone are available in the gateway. Signal Type: Brief Duration: Provisioned ITU-T Rec. H.248.27 (07/2003) 5 Additional parameters: Tone Direction ParameterID: btd (0x0001
40、) Type: Enumeration Possible values: External ext (0x0001), Internal int (0x0002), Both both (0x0003) Description: The tone direction indicates in which direction the signal shall proceed with respect to the centre of the context. “Internal“ denotes that the signal shall proceed toward the centre of
41、 the context from the termination, while “external“ denotes that the signal shall proceed toward the edge of the context. “Both“ indicates that the signal shall proceed in both directions. Unspecified tone direction shall default to “external“. Note that using the playtone signal in package tonegen
42、to generate this signal will prevent the capability to use the directionality parameter. 5.4 Statistics None. 5.5 Procedures None. 6 Diagnostic tones generation package PackageID: test (0x0039) Version: 1 Extends: tonegen version 1 This package defines diagnostic signals for use by telephony provide
43、rs. The definitions and usage of these tones are dependent upon the test application in use. These signals are provided as an aid to performing diagnostic tests and the use and characteristics of the signals may vary from region to region and implementation to implementation. 6.1 Properties None. 6.
44、2 Events None. 6.3 Signals 6.3.1 Low tone SignalID: low (0x0066) Description: Generates a low tone. The physical characteristics of low tone are available in the gateway. 6 ITU-T Rec. H.248.27 (07/2003) Signal Type: Brief Duration: Provisioned Additional parameters: Tone Direction ParameterID: btd (
45、0x0001) Type: Enumeration Possible values: External ext (0x0001), Internal int (0x0002), Both both (0x0003) Description: The tone direction indicates in which direction the signal shall proceed with respect to the centre of the context. “Internal“ denotes that the signal shall proceed toward the cen
46、tre of the context from the termination, while “external“ denotes that the signal shall proceed toward the edge of the context. “Both“ indicates that the signal shall proceed in both directions. Unspecified tone direction shall default to “external“. Note that using the playtone signal in package to
47、negen to generate this signal will prevent the capability to use the directionality parameter. The other signals in this package are specified in exactly the same way. A table with all signal names and signal IDs is included. Note that each signal is defined as both a signal and a toneid, thus exten
48、ding the basic tone generation package. Signal name Signal ID/tone id Low Tone low (0x0066) High Tone high (0x0067) Loud Tone loud (0x0068) Faint Tone faint (0x0069) Slow Interrupted Tone slow (0x006a) Fast Interrupted Tone fast (0x006b) 6.3.2 High one SignalID: high (0x0067) Description: Generates
49、a high tone. The physical characteristics of high tone are available in the gateway. Signal Type: Brief Duration: Provisioned Additional parameters: Tone Direction ParameterID: btd (0x0001) Type: Enumeration ITU-T Rec. H.248.27 (07/2003) 7 Possible values: External ext (0x0001), Internal int (0x0002), Both both (0x0003) Description: The tone direction indicates in which direction the signal shall proceed with respect to the centre of the context. “Internal“ denotes that the signal shall proceed toward the centre of the context from the te
