1、 TIA-470.110-E (Revision of TIA-470.110-D) January 2018 Telecommunications Telephone Terminal Equipment Transmission Requirements for Analog Telephones with Handsets ANSI/TIA-470.110-E-2018 APPROVED: JANUARY 17, 2018 NOTICE TIA Engineering Standards and Publications are designed to serve the public
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23、THE USE OF THE CONTENTS HEREOF, AND THESE CONTENTS WOULD NOT BE PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS. ANSI/TIA-470.110-E i TABLE OF CONTENTS FOREWORD . v INTRODUCTION vi 1 SCOPE. 1 2 NORMATIVE REFERENCES 2 3 ABBREVIATIONS, ACRONYMS, AND DEFINITIONS 3 3.1 Definitions . 3 3.2 Abbreviations and Ac
24、ronyms . 5 4 TESTING CONSIDERATIONS. 6 4.1 General 6 4.1.1 Acoustic Test Interface Equipment 6 4.1.2 Test Signals . 6 4.1.3 Test Position 6 4.1.4 Testing Methods 6 4.1.5 Test Points and Range of Requirements . 6 4.1.6 Subjective Testing . 6 4.1.7 Test Environment Background Noise 6 4.2 Test Circuits
25、 . 7 4.2.1 Receive Testing with Artificial Lines . 7 4.2.2 Send Testing with Artificial Lines 7 4.2.3 Sidetone Testing with Artificial Lines 7 4.2.4 DC Feed Circuit . 8 4.2.5 Termination Impedance . 9 4.2.6 Source Impedance 9 4.2.7 Artificial Lines 10 4.2.8 Telephone Load Simulator . 11 5 TECHNICAL
26、REQUIREMENTS 13 5.1 Categories of Criteria . 13 5.2 Receive Performance . 13 5.2.1 Listener Reference Point 13 5.2.2 Receive Output Level 14 5.2.3 Receive Frequency Response . 15 5.2.4 Receive Output - Parallel Set Off-Hook . 18 5.2.5 Receive Output Multi-Line . 18 5.2.6 Receive Volume Control - Con
27、versational Gain . 19 5.2.7 Receive Distortion . 19 5.2.8 Receive Distortion Parallel set 20 5.2.9 Receive Distortion Maximum Volume Control Setting . 20 5.2.10 Receive Noise 20 5.2.11 Receive Noise - Single Frequency Interference (SFI) . 20 5.3 Send Performance 22 ANSI/TIA-470.110-E ii 5.3.1 Send F
28、requency Response . 22 5.3.2 Send Output . 24 5.3.3 Send Output - Parallel Set Off-Hook 25 5.3.4 Send Output Multi-Line 26 5.3.5 Send Muting 27 5.3.6 Send Distortion 27 5.3.7 Send Distortion - Parallel set 28 5.3.8 Send Off-Hook Noise 28 5.3.9 Send On-Hook Noise . 28 5.3.10 Send Off-Hook SFI 29 5.4
29、Talker Sidetone Performance . 30 5.4.1 Sidetone Delay 30 5.4.2 Sidetone Masking Rating (STMR) . 30 5.5 Acoustics Related to Analog Terminal Adaptor (ATA) Connection 31 5.5.1 Receive Output Level - ATA Connection. 31 5.5.2 Receive Frequency Response - ATA Connection . 31 5.5.3 Send Frequency Response
30、 - ATA Connection 33 5.5.4 Sidetone Masking Rating (STMR) - ATA Connection . 35 5.6 Stability Requirements . 36 5.6.1 Acoustic Stability 36 5.7 Additional Performance Requirements . 38 5.7.1 Magnetic Field for Hearing Aid Coupling 38 5.7.2 Acoustic Echo Control . 39 ANNEX A (NORMATIVE) CALCULATION O
31、F LOUDNESS RATINGS . 40 A.1 Send Loudness Rating (Handset): . 40 A.2 Receive Loudness Rating (Handset): 40 A.3 Sidetone Masking Rating (Handset): 41 ANNEX B (NORMATIVE) WEIGHTING CURVES 42 B.1 Receive Noise Curve 42 B.2 Send Noise Curves . 43 B.3 Historical Background of Send Noise Weighting Curves
32、44 ANNEX C (NORMATIVE) DRP TO FF AND DRP TO ERP TRANSFER FUNCTIONS 47 C.1 DRP to FF Transfer Function . 47 C.2 DRP to ERP Transfer Function 49 ANNEX D (NORMATIVE) ISO FREQUENCIES . 51 ANNEX E (NORMATIVE) PULSED NOISE SIGNAL-TO-DISTORTION-AND-NOISE RATIO (PN-SDNR) 53 ANNEX F (INFORMATIVE) VOLUME CONT
33、ROL RESET AND OVERRIDE INFORMATION . 56 ANNEX G (INFORMATIVE) RECEIVE ASSISTIVE FEATURES . 57 G.1 Handset Receive Tone Control . 57 ANSI/TIA-470.110-E iii G.2 Handset Receive Automatic Gain Control (AGC). 57 G.3 Handset Receive Automatic Level Enhancement (ALE) . 57 ANNEX H (INFORMATIVE) OTHER PARAM
34、ETERS THAT MAY INFLUENCE PRODUCT PERFORMANCE . 58 ANNEX I (INFORMATIVE) EXAMPLE OF KNOWN ATA TERMINATION IMPEDANCES59 ANNEX J (INFORMATIVE) BIBLIOGRAPHY 60 TABLE OF FIGURES Figure 1 Test circuit for receive measurements . 7 Figure 2 Test circuit for send measurements . 7 Figure 3 Test circuit for si
35、detone measurements 7 Figure 4 One possible dc feed circuit for PSTN. 8 Figure 5 One possible dc feed circuit for ATA 9 Figure 6 Artificial line segment. 10 Figure 7 Telephone Load Simulator (TLS) V-I characteristic requirement . 11 Figure 8 One possible Telephone Load Simulator implementation 12 Fi
36、gure 9 Receive frequency response limits 17 Figure 10 Send frequency response limits . 23 Figure 11 Receive frequency response limits for ATA connection. 32 Figure 12 Send frequency response limits for ATA connection . 34 Figure 13 Reference Corner Jig (RCJ) for stability testing . 36 Figure 14 Stab
37、ility face down orientation (#1) test 37 Figure 15 Stability on side orientation (#2) test . 37 Figure 16 Figure 1/G.131 Talker echo tolerance curves . 39 Figure B.1 A-weighting curve . 42 Figure B.2 Psophometric and C-Message weighting curve comparison . 44 Figure B.3 (A) 144-line weighting. (B) F1
38、A-line weighting and (C) C-message weighting curves 45 Figure C.1 DRP to FF Transformation Curve 48 Figure C.2 DRP to ERP Transformation Curve . 50 Figure E.1 Stimulus, Measurement, and Analysis Bands for PN-SDNR . 54 Figure I.1 One Known VG Selectable Termination Impedances 59 ANSI/TIA-470.110-E iv
39、 TABLE OF TABLES Table 1 Artificial line segment component values . 10 Table 2 Receive level limits 14 Table 3 Receive Loudness Rating (RLR) limits. 14 Table 4 Receive frequency response limits 17 Table 5 Send frequency response limits 23 Table 6 Send Level Limits 24 Table 7 Send loudness rating lim
40、its . 24 Table 8 Receive frequency response limits ATA connection . 32 Table 9 Send frequency response limits ATA connection 33 Table 10 Reference corner handset placement for stability test 37 Table A.1 ITU-T P.79 Tables 1, 2 and 3, weighting factors for calculating loudness ratings 41 Table B.1 A-
41、weighting curve 42 Table B.2 Psophometric weighting curve 43 Table B.3 C-Message weighting curve 43 Table C.1 DRP to FF Transformation Values at 1/12 Octave Center Frequencies 47 Table C.2 DRP to FF Transformation Values at R40 Frequencies . 47 Table C.3 DRP to ERP Correction Factors at 1/12 Octave
42、Frequencies . 49 Table C.4 DRP to ERP Correction Factors at R40 Frequencies . 50 Table D.1 ISO R-40, ISO R-10, 1/12 octave and 1/3 octave frequencies 51 Table E.1 Stimulus and Stimulus Measurement Bands for PN-SDNR . 54 Table E.2 Distortion Analysis Notch Bands for PN-SDNR 55 ANSI/TIA-470.110-E v FO
43、REWORD (This foreword is not part of this standard.) This document is a TIA Telecommunications standard produced by Working Group TR-41.3.5 of Committee TR-41. This standard was developed in accordance with TIA procedural guidelines, and represents the consensus position of the Working Group and its
44、 parent Subcommittee TR-41.3, which served as the formulating group. This standard is based on ANSI/TIA-470.110-D. There are 10 annexes in this Standard. Annex A through Annex E are normative and are considered part of this Standard. Annex F through Annex J are informative and are not considered par
45、t of this Standard. The leadership of the TR-41.3.5 Analog Interface Communications Device Working Group (Chair: Steve Whitesell, Whitesell Consulting LLC) acknowledges the written contributions provided by the following individuals in the development of this standard. Organization Representative Pr
46、evious Versions TIA-470.110-E AST Technology Labs Inc. Don McKinnon Editor Editor AST Technology Labs Inc. James Bress Editor Uniden Al Baum Whitesell Consulting LLC Stephen R Whitesell Copyrighted parts of ITU-T Recommendation P.79 are used with permission of the ITU. The ITU owns the copyright for
47、 the ITU Recommendations. Copyrighted parts of ISO 3 are used with permission of the ISO. The ISO owns the copyright for the ISO Standards. Suggestions for improvement of this standard are welcome. They should be sent to: Telecommunications Industry Association Technology and Standards Department Suite 200 1320 North Courthouse Road Arlington, VA 22201 ( http:/www.tiaonline.org )
