1、 TIA STANDARD Telecommunications Telephone Terminal Equipment Resistance and Impedance Performance Requirements for Analog Telephones TIA-470.210-C Revision of TIA/EIA-470-B) APRIL 2004 TELECOMMUNICATIONS INDUSTRY ASSOCIATION Representing the telecommunications industry in association with the Elect
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7、 applicability of regulatory limitations before its use. (From Standards Proposal No. 3-4350.210-RV3, formulated under the cognizance of the TIA TR-41.3 Subcommittee on Analog and Digital Wireline Terminals.) Published by TELECOMMUNICATIONS INDUSTRY ASSOCIATION 2004 Standards and Technology Departme
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21、 license from IHS-,-,-Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA-470.210-C The TR-41.3.6 Working Group acknowledges the contribution made by the following individuals i
22、n the development of this standard. Name Representing Position (If Applicable) Don McKinnon AST Technology Labs, Inc. Chair / Editor Rick Carey RadioShack Editor Dave Stenner Advent Instruments, Inc. Fred Bonhomme Atlinks Ken Macdonald Microtronix Systems Ltd. Amar Ray Sprint Al Baum Uniden Steve Wh
23、itesell VTech The TR-41.3.6 Working Group, which had the technical responsibility during the development of this standard, had the following participating members. Name Representing James Bress AST Technology Labs Jim McNeill Atlinks Jim Mazzolini Casio Communications Pierluigi Pacciardi Casio Commu
24、nications Rick White CIDCO Communications John Bareham Consultant in Electroacoustics Len Bleile ESP Berndt Martenson ETSI Harry Van Zandt ESC Technologies Ken Macdonald Microtronix Systems Steve Kropp VTech Copyright Telecommunications Industry Association Provided by IHS under license with EIANot
25、for ResaleNo reproduction or networking permitted without license from IHS-,-,-Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA-470.210-C i TABLE OF CONTENTS 1 SCOPE _1 2 REF
26、ERENCES_2 2.1 NORMATIVE REFERENCES _2 2.2 INFORMATIVE REFERENCES _2 3 ABBREVIATIONS, ACRONYMS, AND DEFINITIONS _3 3.1 ABBREVIATIONS AND ACRONYMS _3 3.2 DEFINITIONS _3 4 TECHNICAL REQUIREMENTS _4 4.1 CATEGORIES OF CRITERIA_4 4.2 REQUIREMENTS MODEL_4 4.3 TEST EQUIPMENT PERFORMANCE _4 4.4 DC FEED CIRCU
27、IT _5 4.5 ON-HOOK RESISTANCE _6 4.5.1 Requirements6 4.5.2 Method of Measurement 6 4.6 OFF-HOOK RESISTANCE _8 4.6.1 dc Resistance8 4.6.1.1 Requirements. 8 4.6.1.2 Method of Measurement 8 4.6.2 Simulated Open Switch Interval Recovery Time.10 4.6.2.1 Requirements. 10 4.6.2.2 Method of Measurement 10 4.
28、7 ON-HOOK IMPEDANCE _11 4.7.1 dc Current During Ringing.12 4.7.1.1 Requirements. 12 4.7.1.2 Method of Measurement 12 4.7.2 Metallic Impedance During Ringing13 4.7.2.1 Requirement 13 4.7.2.2 Method of Measurement 13 4.7.3 Longitudinal Impedance During Ringing 14 4.7.3.1 Requirements. 14 4.7.3.2 Metho
29、d of Measurement 14 4.7.4 Longitudinal Impedance for ac Power Induction from Power Lines .15 4.7.4.1 Requirements. 15 4.7.4.2 Method of Measurement 15 4.7.5 On-Hook Metallic Impedance (5 Hz to 200 Hz, 1 Vrms to 10 Vrms) .16 4.7.5.1 Requirement 16 4.7.5.2 Method of Measurement 16 4.7.6 In-Band On-Hoo
30、k Metallic Impedance (200 to 3200 Hz) .17 4.7.6.1 Requirement 17 4.7.6.2 Method of Measurement 17 4.8 OFF-HOOK METALLIC IMPEDANCE (RETURN LOSS) _18 4.8.1 Requirements18 4.8.2 Method of Measurement 18 Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for Resa
31、leNo reproduction or networking permitted without license from IHS-,-,-TIA-470.210-C ii 4.9 LONGITUDINAL BALANCE _ 20 4.9.1 Requirement .20 4.9.2 Method of Measurement.20 ANNEX A (INFORMATIVE) Scaled On-Hook Performance Limits Based On CPE Quantity Connected At The CI _ 21 ANNEX B (INFORMATIVE) ISO
32、R-40 Frequencies _ 22 ANNEX C (INFORMATIVE) Longitudinal Balance Method Of Measurement _ 23 Table of Figures Figure 1 One possible dc Feed Circuit .5 Figure 2 On-Hook Resistance Requirements6 Figure 3 On-Hook Resistance between Tip and Ring 7 Figure 4 On-Hook Resistance Tip-to-Ring with Ring grounde
33、d and Tip-to-Ring with Tip grounded 7 Figure 5 V vs. I Characteristic Requirements.8 Figure 6 Off-Hook Resistance test setup 9 Figure 7 Open Switch Interval test setup10 Figure 8 dc Current during Ringing Requirements 12 Figure 9 dc Current during Ringing test setup12 Figure 10 Metallic Impedance Du
34、ring Ringing Requirements.13 Figure 11 Metallic Impedance test setup 13 Figure 12 Longitudinal Impedance test setup.14 Figure 13 On-Hook Metallic Impedance Requirements.16 Figure 14 In-Band On-Hook Metallic Impedance (200 to 3200 Hz) Requirements 17 Figure 15 Return Loss Requirements .18 Figure 16 R
35、eturn Loss Test Circuit 19 Figure 17 Longitudinal Balance requirements20 Figure C.1 Example Longitudinal Balance Test Setup.23 Table of Tables Table 1 On-Hook Resistance Test Matrix 7 Table 2 Off-Hook Resistance Test Matrix9 Table 3 Simulated Ringing Test Signal Matrix 11 Table 4 ac Power Induction
36、Test Signal Matrix .15 Table 5 5 Hz to 200 Hz On-Hook Metallic Impedance Test Signal Matrix .16 Table 6 In-Band On-Hook Metallic Impedance Test Signal Matrix 17 Table A.1 Scaled On-Hook Performance From Recommended Limits .21 Table B.1 ISO R-40 Frequencies22 Copyright Telecommunications Industry Ass
37、ociation Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA-470.210-C 1 1 SCOPE This standard establishes criteria and procedures for evaluating the Resistance and Impedance performance of analog telephones and terminals conne
38、cted to the Public Switched Telephone Network (PSTN). The recommended on-hook requirements are written with a model of five (5) Customer Premise Equipment (CPE) attached to the Customer Interface (CI) and the minimum performance requirements are based on a model of three (3) CPE. This document propo
39、ses or references at least one measurement procedure for each technical requirement. However, these procedures are not exclusive. Any measurement procedure and equipment that can result in an identical measurement is considered valid. While the procedures may call out specific test points within the
40、 requirements, the full range of the requirements take precedent over the test method. Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA-470.210-C 2 2 REFERENCES The following
41、 standards contain provisions, which, through reference 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 possi
42、bility of applying the most recent editions of the standards indicated below. ANSI and TIA maintain registers of currently valid national standards published by them. 2.1 NORMATIVE REFERENCES 1. ANSI/TIA-968-A-2002, Telecommunications Telephone Terminal Equipment Technical Requirements for Connectio
43、n of Terminal Equipment to the Telephone Network. 2.2 INFORMATIVE REFERENCES 1. ANSI T1.401-2000, Network-to-Customer Installation Interfaces Analog Voicegrade Switched Access Lines Using Loop-Start and Ground-Start Signaling. Copyright Telecommunications Industry Association Provided by IHS under l
44、icense with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA-470.210-C 3 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 CI Cu
45、stomer Interface CO Central Office (Used broadly to describe the telephone switch connected to a subscribers line) CPE Customer Premises Equipment ERL Echo Return Loss KSU Key System Unit RL Return Loss OSI Open Switch Interval 3.2 DEFINITIONS For the purposes of this Standard, the following definit
46、ions apply. Echo Return Loss The return loss averaged with 1/f power weighting over the log frequency band 500 Hz to 2500 Hz. Line Idle: A state of the CPE line when all connected CPE are On-Hook. Line In-Use: A state of the CPE line when at least one CPE is Off-Hook. Line State: The condition of the Tip and Ring interface. It can be ei
