TR-41.3.3-04-11-003
Telecommunications
Telephone Terminal Equipment
Transmission Requirements for Narrowband Voice over IP and Voice over PCM Digital Wireline Telephones
SP-3-4352-RV2 (to become ANSI/TIA-810-B)
Draft 1 (October 6, 2004)
Editor: Roger Britt
Changes:
1. Deleted Clause 8 QoS (replaced by TSB116).
2. Corrected Clause 3 Reference TIA-571.
3. Corrected Clauses 5.2.1.2 and 5.2.2.2, replaced “should” with “shall”.
4. Corrected Clause 5.7.1.2, replaced “0.5 m” with “50 cm”.
5. Added Editor’s Note to Clause 5.10.2.3.
6. Corrected Clause 6.5.1, added “or headband”.
NOTICE
Nortel Networks grants a free, irrevocable license to the Telecommunications Industry Association (TIA) to incorporate text or other copyrightable material contained in this contribution and any modifications thereof in the creation of a TIA Publication; to copyright and sell in TIA's name any TIA Publication even though it may include all or portions of this contribution; and at TIA's sole discretion to permit others to reproduce in whole or in part such contribution or the resulting TIA Publication. Nortel Networks will also be willing to grant licenses under such copyrights to third parties on reasonable, non-discriminatory terms and conditions for purpose of practicing a TIA Publication which incorporates this contribution.
This document has been prepared by Nortel Networks to assist the TIA Engineering Committee. It is proposed to the Committee as a basis for discussion and is not to be construed as a binding proposal on Nortel Networks. Nortel Networks specifically reserves the right to amend or modify the material contained herein and nothing herein shall be construed as conferring or offering licenses or rights with respect to any intellectual property of Nortel Networks other than provided in the copyright statement above.
Nortel Networks agrees that if it has changed or added text to the required language in the TIA contribution template as contained in the TIA Engineering Manual, any such change or addition which is inconsistent with such contribution template, is of no force or effect.
SP-3-4352-RV2 (to become ANSI/TIA-810-B)
TABLE OF CONTENTS
1. Introduction 1
2. Scope 2
2.1. Limits of Applicability 2
2.2. Categories of Criteria 2
2.3. FCC Part 68 2
2.4. Environmental 2
2.5. Safety 2
3. Normative References 3
4. Definitions, Abbreviations and Acronyms 5
4.1. Codec 5
4.2. Ear Reference Point (ERP) 5
4.3. HATS Position 5
4.4. Mouth Reference Point (MRP) 5
4.5. Quiet and Full Scale Code 5
4.6. Reference Codec 5
4.7. Direct Digital Processing 6
4.8. Sound Pressure Levels 7
4.9. Electric Power and Noise Levels 7
4.10. Abbreviations and Acronyms 7
5. Handset Technical Requirements 9
5.1. Handset Frequency Response 9
5.1.1. Handset Send Frequency Response 9
5.1.2. Handset Receive Frequency Response 11
5.2. Handset Loudness Ratings and Receive Volume Control 13
5.2.1. Handset Send Loudness Rating (SLR) 13
5.2.2. Handset Receive Loudness Rating 13
5.2.3. Handset Receive Volume Control 14
5.2.4. Handset Talker Sidetone 14
5.3. Handset Noise 14
5.3.1. Handset Send Noise 14
5.3.2. Handset Send Single Frequency Interference 14
5.3.3. Handset Receive Noise 15
5.3.4. Handset Receive Single Frequency Interference 15
5.4. Handset Receive Comfort Noise (Advisory) 16
5.4.1. General 16
5.4.2. Measurement Method 16
5.4.3. Requirement 16
5.5. Handset Distortion and Noise 16
5.5.1. Handset Send Distortion and Noise 17
5.5.2. Handset Receive Distortion and Noise 17
5.6. Weighted Terminal Coupling Loss (TCLw) 18
5.6.1. Measurement Method 18
5.6.2. Requirements 19
5.7. Stability Loss 20
5.7.1. Measurement Method 20
5.7.2. Requirement 20
5.8. Long Duration Maximum Acoustic Pressure (Steady State Input) 21
5.8.1. General 21
5.8.2. Measurement Method 21
5.8.3. Requirements 22
5.9. Short Duration (Peak) Acoustic Pressure 22
5.9.1. General 22
5.9.2. Measurement Method 22
5.9.3. Requirements 23
5.10. Packet Voice Latency (Advisory) 23
5.10.1. Handset Send Latency 24
5.10.2. Handset Receive Latency 24
6. Headset Technical Requirements 25
6.1. Headset Frequency Response 25
6.1.1. Headset Send Frequency Response 25
6.1.2. Headset Receive Frequency Response 26
6.2. Headset Loudness Ratings 27
6.2.1. Headset Send Loudness Rating 27
6.2.2. Headset Receive Loudness Rating 27
6.2.3. Headset Talker Sidetone 28
6.3. Headset Noise 29
6.3.1. Headset Send Noise 29
6.3.2. Headset Send Single Frequency Interference 29
6.3.3. Headset Receive Noise 30
6.3.4. Headset Receive Single Frequency Interference 30
6.4. Headset Distortion and Noise 30
6.4.1. Headset Send Distortion and Noise 31
6.4.2. Headset Receive Distortion and Noise 31
6.5. Weighted Terminal Coupling Loss (TCLw) 32
6.5.1. Measurement Method 32
6.5.2. Requirements 32
6.6. Long Duration Maximum Acoustic Pressure (Steady State Input) 33
6.6.1. General 33
6.6.2. Measurement Method 34
6.6.3. Requirements 34
6.7. Short Duration (Peak) Acoustic Pressure 34
6.7.1. General 34
6.7.2. Measurement Method 35
6.7.3. Requirements 35
7. Handsfree Technical Requirements (Advisory) 36
7.1. Handsfree Frequency Response 36
7.1.1. Handsfree Send Frequency Response 36
7.1.2. Handsfree Receive Frequency Response 38
7.2. Handsfree Loudness Ratings and Receive Volume Control 40
7.2.1. Handsfree Send Loudness Rating 40
7.2.2. Handsfree Receive Loudness Rating 40
7.2.3. Handsfree Receive Volume Control 40
7.3. Handsfree Noise 40
7.3.1. Handsfree Send Noise 40
7.3.2. Handsfree Send Single Frequency Interference 41
7.3.3. Handsfree Receive Noise 41
7.3.4. Handsfree Receive Single Frequency Interference 42
7.4. Handsfree Distortion and Noise 42
7.4.1. Handsfree Send Distortion and Noise 42
7.4.2. Handsfree Receive Distortion and Noise 43
7.5. Weighted Terminal Coupling Loss (TCLw) 43
7.5.1. Measurement Method 43
7.5.2. Requirements 43
7.6. Stability Loss 44
7.6.1. Measurement Method 44
7.6.2. Requirement 44
Annex A (informative) – Calculation of Loudness Ratings 45
Annex B (informative) – Measurement and Level Conversions 48
Annex C (informative) – Preferred 1/12 Octave Frequencies 50
FOREWORD
(This foreword is not part of this standard.)
This document is a TIA/EIA Telecommunications standard produced by Working Group
TR-41.3.3 of Committee TR-41. This standard was developed in accordance with TIA/EIA procedural guidelines, and represents the consensus position of the Working Group and its parent Subcommittee TR-41.3, which served as the formulating group. This standard is based on TIA/EIA/IS-810.
The TR-41.3.3 VoIP/PCM Transmission Performance Working Group acknowledges the contribution made by the following individuals in the development of this standard.
Name / RepresentingRon Magnuson / Siemens / Chair
Roger Britt / Nortel Networks / Editor
John Bareham / Consultant in Electroacoustics
Kevin Cross / Malden Electronics Ltd.
Steve Graham / Nortel Networks
Phil Holland / Circa Communications Ltd.
Michael Knappe / Cisco Systems
Ken Simpson / Simon Fraser University Engineering Student
Stephen Whitesell / Lucent Technologies / TR-41.3 Chair
Allen Woo / Plantronics
Bob Young / Bob Young Associates
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 Standards.
The three annexes in this Standard are informative and are not considered part of this Standard.
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
XXX
SP-3-4352-RV2 (to become ANSI/TIA-810-B)
1. Introduction
This revision of TIA/EIA/IS-810 establishes handset, headset and handsfree telephone audio performance requirements for digital wireline telephones regardless protocol or digital format. A number of improvements and corrections have been made, particularly related to single frequency interference and acoustic pressure.
This standard only addresses conventional narrowband performance, where narrowband is defined as the frequency range between 300 and 3400 Hz. Wideband telephony, in the frequency range between 150 and 6800 Hz, is an enhancement that is likely to offered by VoIP telephones. The performance requirements of wideband telephony will be addressed in a future TIA/EIA standard.
2. Scope
This standard establishes voice performance requirements for narrowband digital wireline telephones with codecs that conform to the ITU-T G-Series Recommendations and where transmission is in digital format. A telephone is defined as a device that terminates networks and provides telephony voice service. Transmission may be over Local Area Networks, Firewire/IEEE1394, Universal Serial Bus (USB), public ISDN or digital over twisted pair wire. Applications include Voice over Internet Protocol (VoIP) and PCM-based telephones, whether connected through modems, gateways, or PBXs and personal computer-based telephones that may or may not have handsets.
Technical requirements are set for handset, headset and handsfree (speakerphone) modes of operation. Quality of Service is also addressed in Section Error! Reference source not found.. These requirements apply regardless of the technology used to couple the handset or headset to the telephone. Coupling may be by a cord, a short range air interface such as, but not limited to, a radio interface, an electric field interface, a magnetic field interface or an infra-red interface.
2.1. Limits of Applicability
These requirements are not intended to describe specific requirements for the following types of digital voice terminal equipment: telephones with carbon transmitters, ISDN terminal adapters and cellular voice terminals.
The loudness ratings in this standard intentionally differ from loss plan published in the PBX standard ANSI/TIA/EIA-464-B. At the time of approval of this standard, Project, PN-3673, was active to revise the ANSI/TIA/EIA-464-B loss plan to agree with this standard and extend its applicability to IP Gateways. Mixing digital telephone loudness ratings and PBX/Gateway loss plans may not provide optimum performance.
2.2. Categories of Criteria
Mandatory requirements are designated by the word "shall". Advisory requirements are designated by the word "should," or "may," or "desirable" which are used interchangeably in this standard. Advisory criteria represent product goals or are included in an effort to ensure universal product compatibility. Where both a mandatory and an advisory level are specified for the same criterion, the advisory level represents a goal currently identifiable as having distinct compatibility or performance advantages toward which future designs should strive.
2.3. FCC Part 68
This standard is intended to be in conformity with Part 68 of the Federal Communications Commission (FCC) Rules and Regulations, but is not limited to the scope of those rules. In the event that Part 68 requirements are more stringent than those contained in this standard, the provisions of Part 68 apply.
2.4. Environmental
The telephone will also be subject to the applicable environmental conditions specified in EIA/TIA-571.
2.5. Safety
This standard does not contain safety requirements. Compliance with the applicable UL and CSA safety standards may be required in certain locations.
3. Normative References
The following 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 possibility of applying the most recent editions of the standards indicated below, or their successors. ANSI and TIA maintain registers of currently valid national standards published by them.
[1] ANSI/TIA/EIA-464-B-1996, Requirements for Private Branch Exchange (PBX) Switching Equipment.
[2] ANSI/TIA/EIA-504-A-1997, Telecommunications – Telephone Terminal Equipment – Magnetic Field and Acoustic Gain Requirements for Handset Telephones Intended for use by the Hard of Hearing.
[3] ANSI/TEIA/ETIA-571-A-19991, Environmental Considerations for Telephone Terminals.
[4] ANSI/TIA/EIA-579-A-1998, Telecommunications – Telephone Terminal Equipment – Transmission Requirements for Digital Wireline Telephones.
[5] ANSI/IEEE Standard 269-1992, Standard Methods for Measuring Transmission Performance of Analog and Digital Telephone Sets.
[6] ANSI/IEEE Standard 661-1979 (Reaff 1998), Standard Method for Determining Objective Loudness Ratings of Telephone Connections.
[7] ANSI/IEEE Standard 1206-1994, Standard Methods for Measuring Transmission Performance of Telephone Handsets and Headsets.
[8] ANSI/IEEE Standard 1329-1999, Standard Method for Measuring Transmission Performance of Hands-Free Telephone Sets.
[9] ANSI S1.4-1990, Sound Level Meters.
[10] 47 CFR Part 68, Connection of Terminal Equipment to the Telephone Network.
[11] ITU-T Recommendation G.107 (1998), The E-Model, A Computational Model for use in Transmission Planning.
[12] ITU-T Recommendation G.109 (1999), Definition of categories of speech transmission quality.
[13] ITU-T Recommendation G.113 (1996), Transmission impairments.
[14] ITU-T Appendix I to Recommendation G.113 (1998), Transmission impairments – Appendix I: Provisional planning values for the equipment impairment factor Ie.
[15] ITU-T Recommendation G.114 (1996), One-way transmission time.
[16] ITU-T Recommendation G.122 (1993), Loudness ratings (LRs) of national systems.
[17] ITU-T Recommendation G.131 (1993), Control of talker echo.
[18] ITU-T Recommendation G.175 (1997), Transmission planning for private/public network interconnection of voice traffic.
[19] ITU-T Recommendation G.711 (1988), Pulse code Modulation (PCM) of voice frequencies.
[20] ITU-T Recommendation G.712 (1996), Transmission performance characteristics of pulse code modulation.
[21] ITU-T Recommendation G.723.1 (1996), Dual rate speech coder for multimedia communications transmitting at 5.3 and 6.3 kbit/s.
[22] ITU-T Recommendation G.729 (1996), Coding of speech at 8 kbit/s using conjugate-structure algebraic-code-excited linear-prediction (CS-ACELP).
[23] ITU-T Recommendation O.41 (1994), Psophometer for use on telephone-type circuits.
[24] ITU-T Recommendation O.131 (1988), Quantizing distortion measuring equipment using a pseudo-random noise test signal.
[25] ITU-T Recommendation P.51 (1996), Artificial mouth.
[26] ITU-T Recommendation P.56 (1993), Objective measurement of active speech level.
[27] ITU-T Recommendation P.57 (1996), Artificial ears.
[28] ITU-T Recommendation P.58 (1996), Head and torso simulator for telephonometry.
[29] ITU-T Recommendation P.64 (1999), Determination of sensitivity/frequency characteristics of local telephone systems.
[30] ITU-T Recommendation P.79 (1999), Calculation of loudness ratings for telephone sets.
[31] ITU-T Recommendation P.310 (1996), Transmission characteristics for telephone band (300 - 3400 Hz) digital telephones.
[32] ITU-T Recommendation P.360 (1998), Efficiency of devices for preventing the occurrence of excessive acoustic pressure by telephone receivers.