1、 TIA-470.130-C (Revision of TIA-470.130) April 2008Telecommunications Telephone Terminal Equipment Transmission Requirements for Analog Telephones with Headsets ANSI/TIA-470.130-C-2008 APPROVED: APRIL 16, 2008 REAFFIRMED: MAY 3, 2016 NOTICE TIA Engineering Standards and Publications are designed to
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23、MAGES IS A FUNDAMENTAL ELEMENT OF THE USE OF THE CONTENTS HEREOF, AND THESE CONTENTS WOULD NOT BE PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS.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-470.130-C i TABLE OF CONTENTS FOREWORD _ V 1 SCOPE _ 1 2 REFERENCES _ 2 3 ABBREVIATIONS, ACRONYMS, AND DEFINITIONS _ 3 3.1 ABBREVIATIONS AND ACRONYMS
24、. 3 3.2 DEFINITIONS 4 4 TECHNICAL REQUIREMENTS _ 6 4.1 CATEGORIES OF CRITERIA. 6 4.2 GENERAL 6 4.2.1 Headset Type 6 4.2.2 Mouth and Ear Simulator Usage.6 4.2.3 Headset Positioning 6 4.2.4 Volume and tone control settings .6 4.3 TEST CIRCUITS. 7 4.3.1 Send Testing with Artificial Lines7 4.3.2 Receive
25、 Testing with Artificial Lines.7 4.3.3 Sidetone Testing with Artificial Lines8 4.3.4 DC Feed Circuit9 4.3.5 Termination Impedance10 4.3.6 Artificial Lines10 4.3.7 CPE Load Simulator.11 4.4 RECEIVE PERFORMANCE 13 4.4.1 General13 4.4.2 Headset Receiver Volume Control Setting.13 4.4.3 Headset Receive F
26、requency Response .13 4.4.3.1 Requirement 13 4.4.3.2 Method of Measurement .13 4.4.4 Headset Receive Loudness Rating (RLR) 15 4.4.4.1 Basic Requirement 15 4.4.4.2 Parallel Set Off-Hook Requirement15 4.4.4.3 Conference Mode15 4.4.4.3.1 Requirement 15 4.4.4.3.2 Method of Measurement 16 4.4.5 Headset R
27、eceive Distortion 16 4.4.5.1 Headset Receive Signal-to-Distortion and Noise Ratio16 4.4.5.1.1 Requirement 16 4.4.5.1.2 Method of Measurement 16 ANSI/TIA-470.130-C ii 4.4.5.2 Headset Receive Signal-to-Distortion and Noise Ratio with a Parallel Set16 4.4.6 Headset Receive Noise .17 4.4.6.1 Headset Off
28、-Hook Noise.17 4.4.6.1.1 Requirement .17 4.4.6.1.2 Method of Measurement.17 4.4.6.2 Headset Off-Hook Receive Single Frequency Interference17 4.4.6.2.1 General .17 4.4.6.2.2 Requirement .17 4.4.6.2.3 Measurement Method.17 4.5 SEND PERFORMANCE 18 4.5.1 General18 4.5.2 Headset Send Frequency Response 1
29、8 4.5.2.1 Requirement 18 4.5.2.2 Method of Measurement .18 4.5.3 Headset Send Loudness Rating (SLR) .20 4.5.3.1 Basic Requirement 20 4.5.3.2 Parallel Set Off-Hook Requirement20 4.5.3.3 Conference Mode20 4.5.3.3.1 Requirement .20 4.5.3.3.2 Method of Measurement.20 4.5.4 Headset Send Distortion .21 4.
30、5.4.1 Headset Send Signal-to-Distortion and Noise Ratio.21 4.5.4.1.1 Requirement .21 4.5.4.1.2 Method of Measurement.21 4.5.4.2 Headset Send Signal-to-Distortion and Noise Ratio with a Parallel Set 21 4.5.5 Headset Send Noise 22 4.5.5.1 Headset Off-Hook Noise.22 4.5.5.1.1 Requirement .22 4.5.5.1.2 M
31、ethod of Measurement.22 4.5.5.2 Headset On-Hook Noise .22 4.5.5.2.1 Requirement .22 4.5.5.2.2 Method of Measurement.22 4.5.5.3 Headset Off-Hook Send Single Frequency Interference.23 4.5.5.3.1 General .23 4.5.5.3.2 Requirement .23 4.5.5.3.3 Measurement Method.23 4.5.6 Headset Send Muting23 4.5.6.1 Re
32、quirement 23 4.5.6.2 Method of Measurement .23 4.6 SIDETONE PERFORMANCE24 4.6.1 General24 4.6.2 Headset Sidetone Masking Rating (STMR) .24 4.6.2.1 Requirement 24 4.6.2.2 Method of Measurement .24 ANSI/TIA-470.130-C iii 4.6.3 Headset Sidetone Echo Delay.24 4.6.3.1 Recommendation.24 4.6.3.2 Method of
33、Measurement .24 4.7 ACOUSTIC STABILITY. 25 4.7.1 Requirements 25 4.7.2 Method of Measurement.25 ANNEX A (NORMATIVE) NOISE WEIGHTING CURVES _ 27 A.1 SEND NOISE CURVES 27 A.2 RECEIVE NOISE CURVE 29 ANNEX B (NORMATIVE) CALCULATION OF LOUDNESS RATINGS _ 30 B.1 SEND LOUDNESS RATING (HANDSET):. 30 B.2 REC
34、EIVE LOUDNESS RATING (HANDSET):. 31 B.3 SIDETONE MASKING RATING (HANDSET): 31 ANNEX C (NORMATIVE) ISO R40 AND 1/12THOCTAVE BAND FREQUENCIES _ 33 ANNEX D (INFORMATIVE) BIBLIOGRAPHY _ 35 ANNEX E (INFORMATIVE) RECEIVE ACOUSTIC LIMITING_ 36 ANNEX F (INFORMATIVE) LOUDNESS RATINGS FOR TELEPHONES ON PBX, V
35、OICE GATEWAYS, DIGITAL END OFFICE AND DIGITAL LOOP CARRIERS _ 37 ANNEX G (INFORMATIVE) LOSS PLAN AND LOUDNESS RATING REFERENCES AND HIERARCHY_ 39 ANNEX H (INFORMATIVE) NOMINAL FREQUENCY RESPONSE CHARACTERISTICS AND LOUDNESS RATING CALCULATIONS _ 40 ANNEX I (INFORMATIVE) USE OF THE FREE FIELD AS THE
36、TELEPHONOMETRIC REFERENCE POINT _ 44 ANNEX J (INFORMATIVE) RETURN LOSS TESTING_ 46 ANSI/TIA-470.130-C iv Table of Figures Figure 1 Test Circuit for Send Measurements 7 Figure 2 Test Circuit for Receive Measurements . 7 Figure 3 Test Circuit for Sidetone Measurements 8 Figure 4 One Possible DC Feed C
37、ircuit 9 Figure 5 Artificial Line Segment 10 Figure 6 CPE Load Simulator V-I Characteristic Requirement 11 Figure 7 One Possible CPE Load Simulator Implementation. 12 Figure 8 Headset receive frequency response mask . 14 Figure 9 Headset Send Frequency Response Mask 19 Figure 10 Reference Corner Jig
38、 (RCJ) For Stability Testing 25 Figure 11 Headset Stability Test Orientation #1. 26 Figure 12 Headset Stability Test Orientation #2. 26 Figure A.1 Psophometric and C-Message Noise Weighting Curves Comparison 28 Figure A.2 A-Weighting Noise Weighting Curve 29 Figure F.1 Loudness Rating Relationships
39、for PBXs, VGs and DEOs 38 Figure G.1 Hierarchical Relationship between Loudness Rating and Loss Plan Standards . 39 Figure H.1 Nominal Send Frequency Response . 42 Figure H.2 Nominal Receive Frequency Response 42 Figure I.1 Flat Free Field Loudspeaker Response 44 Figure I.2 HATS Measurement of Same
40、Loudspeaker. 44 Figure I.3 HATS Measurement of Handset Telephone 45 Figure I.4 Type 1 Ear Simulator Measurement of Handset Telephone 45 Table of Tables Table 1 Artificial Line Segment Component Values 10 Table 2 Headset receive frequency response limits 14 Table 3 Headset Receive Loudness Rating Lim
41、its . 15 Table 4 Headset Receive Signal-to-Distortion and Noise Ratio Requirements 16 Table 5 Headset Send Frequency Response Limits 19 Table 6 Headset Send Loudness Rating Limits 20 Table 7 Headset Send Signal-to-Distortion and Noise Ratio Requirements. 21 Table 8 Reference corner headset placement
42、 for stability test 25 Table A.1 Psophometric Weighting Curve Table A.2 C-Message Weighting Curve . 27 Table A.3 A-Weighting Curve 29 Table B.1 ITU-T P.79 Tables 1, 2 and 3, Weighting Factors For Calculating Loudness Ratings 32 Table C.1 ISO R40, ISO R-10,1/12thOctave and 1/3rdOctave Frequencies 33
43、Table H.1 Nominal Frequency Response Characteristics and Loudness Ratings Calculations 43 ANSI/TIA-470.130-C v 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
44、 accordance with TIA procedural guidelines, and represents the consensus position of the Subcommittee, which served as the formulating group. There are ten annexes in this Standard. Annex A, Annex B, and Annex C are normative and are considered part of this Standard; Annex D through Annex J are info
45、rmative and are not considered part of this Standard. The leadership of the TR-41.3.11 Headset Acoustic Performance Requirements for Analog Telephones Subcommittee (Chair: K. Allen Woo, Plantronics, Inc.) acknowledges the written contributions provided by the following individuals in the development
46、 of this document. Organization Representative TIA-470.130-C AST Technology Labs Don McKinnon 9 Editor Acoustics for Communications Ron Magnuson 9 Advent Instruments, Inc. Dave Stenner 9 Consultant in Electro-acoustics John Bareham 9 Bob Young and Associates Bob Young 9 Embarq Amar Ray 9 Listen Inc.
47、 Steve Temme 9 MWM Acoustics Glenn Hess 9 Nortel Roger Britt 9 Plantronics K. Allen Woo 9 Uniden Al Baum 9 Suggestions for improvement of this standard 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-470.130-C 1 Telephone Terminal Equipment Transmission Requirements for Analog Telephones with Headsets 1 SCOPE This standard provides transmission requirements for analog telephones when used with a headset. The requirements in this standard ap
