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TIA-4965-2012 Telecommunications Telephone Terminal Equipment Receive Volume Control Requirements for Digital and Analog Wireline Handset Terminals.pdf

1、 TIA-4965 October 2012Telecommunications Telephone Terminal Equipment Receive Volume Control Requirements for Digital and Analog Wireline Handset Terminals ANSI/TIA-4965- 2012 APPROVED: OCTOBER 19, 2012 NOTICE TIA Engineering Standards and Publications are designed to serve the public interest throu

2、gh eliminating misunderstandings between manufacturers and purchasers, facilitating interchangeability and improvement of products, and assisting the purchaser in selecting and obtaining with minimum delay the proper product for their particular need. The existence of such Standards and Publications

3、 shall not in any respect preclude any member or non-member of TIA from manufacturing or selling products not conforming to such Standards and Publications. Neither shall the existence of such Standards and Publications preclude their voluntary use by Non-TIA members, either domestically or internat

4、ionally. Standards and Publications are adopted by TIA in accordance with the American National Standards Institute (ANSI) patent policy. By such action, TIA does not assume any liability to any patent owner, nor does it assume any obligation whatever to parties adopting the Standard or Publication.

5、 This Standard does not purport to address all safety problems associated with its use or all applicable regulatory requirements. It is the responsibility of the user of this Standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations be

6、fore its use. (From Standards Proposal No. ANSI/TIA-PN-4965-R1, formulated under the cognizance of the TIA TR-41 User Premises Telecommunications Requirements, TR-41.3 Subcommittee on Analog and Digital Wireline Terminals. . Published by TELECOMMUNICATIONS INDUSTRY ASSOCIATION Standards and Technolo

7、gy Department 2500 Wilson Boulevard Arlington, VA 22201 U.S.A. PRICE: Please refer to current Catalog of TIA TELECOMMUNICATIONS INDUSTRY ASSOCIATION STANDARDS AND ENGINEERING PUBLICATIONS or call IHS, USA and Canada (1-877-413-5187) International (303-397-2896) or search online at http:/www.tiaonlin

8、e.org/standards/catalog/ All rights reserved Printed in U.S.A. NOTICE OF COPYRIGHT This document is copyrighted by the TIA. Reproduction of these documents either in hard copy or soft copy (including posting on the web) is prohibited without copyright permission. For copyright permission to reproduc

9、e portions of this document, please contact the TIA Standards Department or go to the TIA website (www.tiaonline.org) for details on how to request permission. Details are located at: http:/www.tiaonline.org/standards/catalog/info.cfm#copyright or Telecommunications Industry Association Technology (

10、b) there is no assurance that the Document will be approved by any Committee of TIA or any other body in its present or any other form; (c) the Document may be amended, modified or changed in the standards development or any editing process. The use or practice of contents of this Document may invol

11、ve the use of intellectual property rights (“IPR”), including pending or issued patents, or copyrights, owned by one or more parties. TIA makes no search or investigation for IPR. When IPR consisting of patents and published pending patent applications are claimed and called to TIAs attention, a sta

12、tement from the holder thereof is requested, all in accordance with the Manual. TIA takes no position with reference to, and disclaims any obligation to investigate or inquire into, the scope or validity of any claims of IPR. TIA will neither be a party to discussions of any licensing terms or condi

13、tions, which are instead left to the parties involved, nor will TIA opine or judge whether proposed licensing terms or conditions are reasonable or non-discriminatory. TIA does not warrant or represent that procedures or practices suggested or provided in the Manual have been complied with as respec

14、ts the Document or its contents. If the Document contains one or more Normative References to a document published by another organization (“other SSO”) engaged in the formulation, development or publication of standards (whether designated as a standard, specification, recommendation or otherwise),

15、 whether such reference consists of mandatory, alternate or optional elements (as defined in the TIA Engineering Manual, 4thedition) then (i) TIA disclaims any duty or obligation to search or investigate the records of any other SSO for IPR or letters of assurance relating to any such Normative Refe

16、rence; (ii) TIAs policy of encouragement of voluntary disclosure (see Engineering Manual Section 6.5.1) of Essential Patent(s) and published pending patent applications shall apply; and (iii) Information as to claims of IPR in the records or publications of the other SSO shall not constitute identif

17、ication to TIA of a claim of Essential Patent(s) or published pending patent applications. TIA does not enforce or monitor compliance with the contents of the Document. TIA does not certify, inspect, test or otherwise investigate products, designs or services or any claims of compliance with the con

18、tents of the Document. ALL WARRANTIES, EXPRESS OR IMPLIED, ARE DISCLAIMED, INCLUDING WITHOUT LIMITATION, ANY AND ALL WARRANTIES CONCERNING THE ACCURACY OF THE CONTENTS, ITS FITNESS OR APPROPRIATENESS FOR A PARTICULAR PURPOSE OR USE, ITS MERCHANTABILITY AND ITS NONINFRINGEMENT OF ANY THIRD PARTYS INT

19、ELLECTUAL PROPERTY RIGHTS. TIA EXPRESSLY DISCLAIMS ANY AND ALL RESPONSIBILITIES FOR THE ACCURACY OF THE CONTENTS AND MAKES NO REPRESENTATIONS OR WARRANTIES REGARDING THE CONTENTS COMPLIANCE WITH ANY APPLICABLE STATUTE, RULE OR REGULATION, OR THE SAFETY OR HEALTH EFFECTS OF THE CONTENTS OR ANY PRODUC

20、T OR SERVICE REFERRED TO IN THE DOCUMENT OR PRODUCED OR RENDERED TO COMPLY WITH THE CONTENTS. TIA SHALL NOT BE LIABLE FOR ANY AND ALL DAMAGES, DIRECT OR INDIRECT, ARISING FROM OR RELATING TO ANY USE OF THE CONTENTS CONTAINED HEREIN, INCLUDING WITHOUT LIMITATION ANY AND ALL INDIRECT, SPECIAL, INCIDEN

21、TAL OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF BUSINESS, LOSS OF PROFITS, LITIGATION, OR THE LIKE), WHETHER BASED UPON BREACH OF CONTRACT, BREACH OF WARRANTY, TORT (INCLUDING NEGLIGENCE), PRODUCT LIABILITY OR OTHERWISE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. THE FOREGOING N

22、EGATION OF DAMAGES IS A FUNDAMENTAL ELEMENT OF THE USE OF THE CONTENTS HEREOF, AND THESE CONTENTS WOULD NOT BE PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS. ANSI/TIA-4965 i TABLE OF CONTENTS FOREWORD_ iii INTRODUCTION _ iv 1 SCOPE _ 1 2 NORMATIVE REFERENCES _ 1 3 ABBREVIATIONS, ACRONYMS, AND DEFINITION

23、S _ 1 3.1 ABBREVIATIONS AND ACRONYMS _ 1 3.2 DEFINITIONS _ 2 4 TECHNICAL REQUIREMENTS _ 3 4.1 GENERAL _ 3 4.1.1 Power Failure Exclusion _3 4.1.2 Adjustable Frequency Response _3 4.1.3 Acoustic Test Interface Equipment _3 4.1.4 Handset Positioning _3 4.1.5 Test Signal _3 4.2 TEST CIRCUITS FOR ANALOG

24、TERMINAL TESTING _ 3 4.2.1 Analog Terminal Receive Testing with Artificial Lines _3 4.2.2 DC Feed Circuit _4 4.2.3 Termination Impedance _5 4.2.4 Test Signal Level _5 4.2.5 Artificial Lines _5 4.3 TEST ARRANGEMENTS FOR DIGITAL TERMINAL TESTING _ 6 4.3.1 Dual Mode Terminals _6 4.3.2 Reference Codecs

25、_6 4.3.2.1 G.711 Reference Narrowband Codec _6 4.3.2.2 Other Narrowband Reference Codecs _7 4.3.2.3 L16-256 Reference Wideband Codec _7 4.3.2.4 Other Wideband Reference Codecs _8 4.3.3 Precautions _8 4.3.4 Test Arrangements _8 4.3.4.1 Reference Codec Arrangement _8 4.3.4.2 Direct Digital Signal Gene

26、ration Arrangement _9 4.3.5 Test Signal Level _9 4.4 RECEIVE VOLUME CONTROL PERFORMANCE _ 9 4.4.1 Requirement _9 4.4.2 Method of Measurement _9 ANNEX A (INFORMATIVE) CONVERSATIONAL GAIN _ 11 A.1 THE HAC ACT _ 11 ANSI/TIA-4965 ii A.2 CONSUMER CONFUSION _ 11 A.3 INVESTIGATION _ 12 A.4 IEEE STD 269 _ 1

27、2 A.5 TEST SIGNAL LEVEL _ 12 A.6 CONVERSATIONAL GAIN PERFORMANCE REQUIREMENT _ 13 A.7 BENEFITS OF USING CONVERSATIONAL GAIN _ 13 TABLE OF FIGURES Figure 1 Test circuit for analog terminal receive measurements 3 Figure 2 One possible dc feed circuit . 4 Figure 3 Artificial line segment . 5 Figure 4 D

28、igital Telephone Set Test Arrangement with Reference Codec 8 Figure 5 Digital Telephone Set Test Arrangement using Direct Digital Signaling 9 TABLE OF TABLES Table 1 Artificial line segment component values . 5 Table 2 Mu-Law and A-Law 0 dBm0 Periodic Sequence that produces a 1 kHz, 0.772 volt rms S

29、ine-Wave Signal 6 ANSI/TIA-4965 iii Foreword (This foreword is not part of this Standard.) This document is a TIA Telecommunications standard produced by Subcommittee TR-41.3 of Committee TR-41. This Standard was developed in accordance with TIA procedural guidelines, and represents the consensus po

30、sition of Subcommittee TR-41.3, which served as the formulating group. There is one annex in this Standard. Annex A is informative and is not considered part of this Standard. The leadership of the TR-41.3 Analog and Digital Wireline Terminals Subcommittee (Chair: James Bress, AST Technology Labs, I

31、nc.) acknowledges the written contributions provided by the following individuals in the development of this standard. Organization Representative TIA-4965 Whitesell Consulting Steve Whitesell Editor Uniden Al Baum Editor AST Technology Labs Inc. Don McKinnon Suggestions for improvement of this Stan

32、dard are welcome. They should be sent to: Telecommunications Industry Association Engineering Department Suite 300 250 Wilson Boulevard Arlington, VA 22201 ( http:/www.tiaonline.org ) ANSI/TIA-4965 iv Introduction Volume control requirements for narrowband digital, wideband digital, and analog wirel

33、ine terminals are included in different industry standard documents, each with their own revision cycle. The Federal Communications Commission and Industry Canada currently reference significantly different versions of these multiple standards documents in their volume control regulations. Many term

34、inals are designed for and marketed in both the United States and Canada. Therefore, this lack of harmonization between the regulatory agencies for the two countries could result in significant problems for manufacturers of analog and/or digital wireline terminals. The purpose of this new Standard i

35、s to provide a single document that can be referenced by both the Federal Communications Commission and Industry Canada in their regulations, resulting in up-to-date and harmonized regulatory volume control requirements. If at some point in the future further research results in improved measurement

36、 techniques or other reasons to revise the volume control criteria, the requirements of both government agencies could be quickly brought up-to-date by simply pointing to the most recent version of this Standard. ANSI/TIA-4965 1 Telephone Terminal Equipment Receive Volume Control Requirements for Di

37、gital and Analog Wireline Handset Terminals 1 SCOPE This Standard establishes handset receive volume control requirements and testing methods for narrowband digital, wideband digital, and analog wireline terminals. 2 NORMATIVE REFERENCES The following standards contain provisions, which, through ref

38、erence in this text, constitute provisions of this Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this Standard are encouraged to investigate the possibility of applying the most recent editions of th

39、e standards indicated below. ANSI and TIA maintain registers of currently valid national standards published by them. 1. ANSI/IEEE Std 269-2010 IEEE Standard Methods for Measuring Transmission Performance of Analog and Digital Telephone Sets, Handsets, and Headsets 2. IEEE Std 1652-2008 - IEEE Stand

40、ard for the Application of Free Field Acoustic Reference to Telephony Measurements 3. ITU-T Recommendation G.711 (1988) Pulse code modulation (PCM) of voice frequencies 4. ITU-T Recommendation P.57 (2011) Artificial ears 5. ITU-T Recommendation P.58 (2011) Head and torso simulator for telephonometry

41、 3 ABBREVIATIONS, ACRONYMS, AND DEFINITIONS 3.1 ABBREVIATIONS AND ACRONYMS For the purposes of this Standard, the following abbreviations and acronyms apply. AWG American Wire Gauge DRP Drum Reference Point HATS Head and Torso Simulator L16-256 Linear, Sixteen Bit, 256 kbit/s Codec PBX Private Branc

42、h Exchange PCM Pulse Code Modulation RLR Receive Loudness Rating ROLR Receive Objective Loudness Rating TLP Transmission Level Point ANSI/TIA-4965 2 3.2 DEFINITIONS For the purposes of this Standard, the following definitions apply. Conversational Gain: The level of an acoustic output from a telepho

43、ne relative to the acoustic level that would be present in a face-to-face conversation at a distance of 1 meter. This reference acoustic level for a face-to-face conversation is 64 dBSPL for binaural listening. However, for monaural listening (such as when using a handset) the reference acoustic level is 70 dBSPL. (When only one ear is used for listening, a talker is perceived to be about 6 dB quieter than when both ears are used. Therefore,

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