TIA-470 110-D-2014 Telecommunications Telephone Terminal Equipment - Transmission Requirements for Analog Telephones with Handsets.pdf

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19、iv Introduction _ vi 1 Scope _ 1 2 Normative References _ 2 3 Abbreviations, Acronyms, and Definitions _ 3 3.1 Abbreviations and Acronyms 3 3.2 Definitions . 4 4 Testing considerations _ 5 4.1 General 5 4.1.1 Subjective Testing . 5 4.1.2 Testing Methods . 5 4.1.3 Test Points and Range of Requirement

20、s . 5 4.1.4 Acoustic Test Interface Equipment . 5 4.1.5 Test Signals . 5 4.1.6 Test Position . 5 4.2 Test Circuits 6 4.2.1 Send Testing with Artificial Lines 6 4.2.2 Receive Testing with Artificial Lines . 6 4.2.3 Sidetone Testing with Artificial Lines 7 4.2.4 DC Feed Circuit 8 4.2.5 Termination Imp

21、edance 8 4.2.6 Artificial Lines 9 4.2.7 CPE Load Simulator . 10 5 Technical Requirements _ 12 5.1 Categories of Criteria 12 5.2 Send Performance . 13 5.2.1 Send Frequency Response 13 5.2.2 Send Loudness Rating (SLR) 14 5.2.3 Send Loudness Rating (SLR) - Parallel Set Off-Hook . 15 5.2.4 Send Loudness

22、 Rating (SLR) Multi-Line 15 5.2.5 Send Distortion . 15 5.2.6 Send Distortion - Parallel set 17 5.2.7 Send Noise Off-Hook 17 5.2.8 Send Noise - Off-Hook - Single Frequency Interference . 18 5.2.9 Send Noise On-Hook . 18 5.2.10 Send Muting 18 5.3 Receive Performance . 19 5.3.1 Nominal Volume Control S

23、etting Determination - Method of Measurement 19 5.3.2 Receive Frequency Response . 19 5.3.3 Receive Loudness Rating (RLR) 21 5.3.4 Receive Loudness Rating (RLR) - Parallel Set Off-Hook 21 5.3.5 Receive Loudness Rating (RLR) Multi-Line . 22 5.3.6 Receive Volume Control - Conversational Gain 22 5.3.7

24、Receive Distortion 22 ANSI/TIA-PN-470.110-D ii 5.3.8 Receive Distortion Parallel set . 24 5.3.9 Receive Distortion Maximum Volume Control Setting 24 5.3.10 Receive Noise Off-hook 25 5.3.11 Receive Noise - Off-Hook - Single Frequency Interference . 25 5.4 Sidetone Performance . 26 5.4.1 Sidetone Mask

25、ing Rating (STMR) . 26 5.4.2 Sidetone Delay 26 5.5 Additional Performance Requirements . 27 5.5.1 Acoustic Stability 27 5.5.2 Magnetic Field for Hearing Aid Coupling 29 Annex A (Normative) Weighting Curves _ 30 A.1 Receive Noise Curve . 30 A.2 Send Noise Curves 31 A.3 Historical Background of Send N

26、oise Weighting Curves . 32 Annex B (Normative) Calculation of Loudness Ratings _ 36 B.1 Send Loudness Rating (Handset): . 36 B.2 Receive Loudness Rating (Handset): 37 B.3 Sidetone Masking Rating (Handset): 37 Annex C (Normative) ISO Frequencies _ 39 Annex D (Informative) Receive Acoustic Limiting _

27、41 Annex E (Informative) Loudness Ratings For Telephones On PBX, VGs and DLCs _ 42 Annex F (Informative) Loss Plan and Loudness Rating References and Hierarchy _ 44 Annex G (Informative) Other Parameters That May Influence Product Performance _ 45 Annex H (Informative) Bibliography _ 46 ANSI/TIA-PN-

28、470.110-D iii TABLE OF FIGURES Figure 1 Test circuit for send measurements 6 Figure 2 Test circuit for receive measurements 6 Figure 3 Test circuit for sidetone measurements 7 Figure 4 One possible dc feed circuit 8 Figure 5 Artificial line segment 9 Figure 6 CPE load simulator V-I characteristic re

29、quirement 10 Figure 7 One possible CPE load simulator implementation . 11 Figure 8 Send frequency response limits 13 Figure 9 Receive frequency response limits . 20 Figure 10 Reference Corner Jig (RCJ) for stability testing . 27 Figure 11 Stability face down orientation (#1) test . 28 Figure 12 Stab

30、ility on side orientation (#2) test 28 Figure A.1 A-weighting curve 30 Figure A.2 Psophometric and C-Message weighting curve comparison . 32 Figure A.3 (A) 144-line weighting. (B) F1A-line weighting and (C) C-message weighting curves 34 Figure E.1 Loudness Rating relationships for PBXs, VGs and DEOs

31、 43 Figure F.1 Hierarchical relationship between Loudness Rating and loss plan standards . 44 TABLE OF TABLES Table 1 Artificial line segment component values 10 Table 2 Send frequency response limits . 13 Table 3 Send loudness rating limits 14 Table 4 Limits for send PN-SDNR vs frequency 15 Table 5

32、 Limits for send PN-SDNR vs level 16 Table 6 Send PN-SDNR stimulus center frequencies and band limits . 16 Table 7 Send PN-SDNR analysis notch frequency band 17 Table 8 Receive frequency response limits . 19 Table 9 Receive loudness rating limits . 21 Table 10 Limits for receive PN-SDNR vs frequency

33、 . 23 Table 11 Limits for receive PN-SDNR vs level 23 Table 12 Receive PN-SDNR stimulus center frequencies and band limits 24 Table 13 Receive PN-SDNR analysis notch frequency band . 24 Table 14 Reference corner handset placement for stability test . 28 Table A.1 A-weighting curve 30 Table A.2 Psoph

34、ometric weighting curve . 31 Table A.3 C-Message weighting curve . 31 Table B.1 ITU-T P.79 Tables 1, 2 and 3, weighting factors for calculating loudness ratings 38 Table C.1 ISO R-40, ISO R-10,1/12thoctave and 1/3rdoctave frequencies 39 ANSI/TIA-PN-470.110-D iv Foreword (This foreword is not part of

35、 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 parent Subcommittee TR-41.3, which

36、served as the formulating group. This standard is based on ANSI/TIA-470.110-C and ANSI/TIA-470.110-C-1. There are eight annexes in this Standard. Annex A, Annex B and Annex C are normative and are considered part of this Standard. Annex D, Annex E, Annex F, Annex G, and Annex H are informative and a

37、re not considered part of this Standard. The leadership of the TR-41.3.5 Handset Acoustic Performance Working Group (Chair/Editor: James Bress, AST Technology Labs Inc.) acknowledges the written contributions provided by the following individuals in the development of this standard. Organization Rep

38、resentative Previous Version TIA-470.110-D AST Technology Labs Inc. James Bress Editor AST Technology Labs Inc. Don McKinnon Editor Microtronix Systems LTD Ken Macdonald Editor Advent Instruments Inc. Dave Stenner Editor Atlinks Fred Bonhomme Bob Young Associates Bob Young Consultant in Electroacous

39、tics John Bareham MWM Acoustics, LLC Glenn R. Hess Listen Inc. Dan Foley Listen Inc. Steve Temme Nortel Roger Britt RadioShack Richard Carey Siemens Ron Magnuson Sprint Dr. Amar Nath Ray Uniden Al Baum VTech Steve Kropp VTech Stephen R Whitesell Whitesell Consulting Stephen R Whitesell ANSI/TIA-PN-4

40、70.110-D v Copyrighted parts of ITU-T Appendix I to Recommendation G.113 and Recommendation P.79 are used with permission of the ITU. The ITU owns the copyright for the ITU Recommendations. Copyrighted parts of ISO 3 are used with permission of the ISO. The ISO owns the copyright for the ISO Standar

41、ds. Suggestions for improvement of this standard are welcome. They should be sent to: Telecommunications Industry Association Engineering Department Suite 200 1320 North Courthouse Road Arlington, VA 22201 ( http:/www.tiaonline.org ) ANSI/TIA-PN-470.110-D vi Introduction This revision of TIA-470.110

42、-C establishes handset telephone acoustic transmission performance requirements for analog telephones. The most significant changes made for this revision include: 1. Changed test signals to be real speech. 2. Removed the “mandatory” receive frequency response mask and changed the “desired” receive

43、frequency response mask to be the “mandatory” receive frequency response mask. 3. Removed the “low leak” (18N) test condition. 4. Changed from using the “Reference Volume Control” setting to the “Nominal Volume Control” setting which is based on Conversational Gain. 5. Send linearity requirements we

44、re removed. 6. Receive linearity requirements were removed. 7. Added a measurement of “Conversational Gain” to measure the volume control gain. 8. Added Magnetic Field For Hearing Aid Coupling (HAC) requirements based on TIA-1083-A. 9. The addendum to TIA-470.110-C was included in the revision. ANSI

45、/TIA-PN-470.110-D 1 Telecommunications Telephone Terminal Equipment Transmission Requirements for Analog Telephones with Handsets 1 SCOPE This standard provides acoustic performance requirements for telephones (Customer Premises Equipment (CPE) with handsets intended for connection to the Public Swi

46、tched Telephone Network (PSTN). These requirements should ensure compatibility and satisfactory performance to the user in a high percentage of installations. ANSI/TIA-PN-470.110-D 2 2 NORMATIVE REFERENCES The following standards contain provisions, which, through reference in this text, constitute

47、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 the standards indicated below. ANSI an