1、 TIA STANDARD Telecommunications Telephone Terminal Equipment Transmission Requirements for Narrowband Digital Telephones TIA-810-B (Revision of TIA-810-A) November 2006 TELECOMMUNICATIONS INDUSTRY ASSOCIATION Representing the telecommunications industry in association with the Electronic Industries
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23、IONS. ANSI/TIA-810-B i TABLE OF CONTENTS 1. INTRODUCTION . 1 2. SCOPE 2 2.1. LIMITS OF APPLICABILITY 2 2.2. CATEGORIES OF CRITERIA . 3 2.3. FCC PART 68. 3 2.4. ENVIRONMENTAL 3 2.5. SAFETY 3 3. NORMATIVE REFERENCES 4 4. DEFINITIONS, ABBREVIATIONS AND ACRONYMS . 5 4.1. CODEC . 5 4.2. EAR REFERENCE POI
24、NT (ERP) 5 4.3. ARTIFICIAL EAR/MOUTH VS. EAR/MOUTH SIMULATOR 5 4.4. HATS POSITION 5 4.5. NOMINAL VOLUME CONTROL SETTING . 5 4.6. REFERENCE VOLUME CONTROL SETTING 5 4.7. PREFERRED EAR SIMULATOR 5 4.8. STANDARD TEST POSITION 5 4.9. RECOMMENDED TEST POSITIONS (RTP). 6 4.10. MOUTH REFERENCE POINT (MRP)
25、6 4.11. QUIET AND FULL SCALE CODE 6 4.12. REFERENCE CODEC . 7 4.13. DIRECT DIGITAL PROCESSING . 7 4.14. SOUND PRESSURE LEVELS . 8 4.15. ELECTRIC POWER AND NOISE LEVELS . 9 4.16. 50TP . 9 4.17. ABBREVIATIONS AND ACRONYMS 9 5. GENERAL TECHNICAL REQUIREMENTS. 10 6. HANDSET TECHNICAL REQUIREMENTS. 11 6.
26、1. HANDSET FREQUENCY RESPONSE 11 6.1.1. Handset Send Frequency Response 11 6.1.2. Handset Receive Frequency Response 13 6.2. HANDSET LOUDNESS RATINGS AND RECEIVE VOLUME CONTROL . 15 6.2.1. Handset Send Loudness Rating (SLR) 15 6.2.2. Handset Receive Loudness Rating (RLR) 15 6.2.3. Handset Receive Vo
27、lume Control Range 15 6.2.4. Magnetic Field for Hearing Aid Coupling 16 6.2.5. Handset Talker Sidetone (STMR). 16 6.2.6. Handset Sidetone Delay 16 6.3. HANDSET NOISE. 17 6.3.1. Handset Send Noise 17 ANSI/TIA-810-B ii 6.3.2. Handset Send Single Frequency Interference17 6.3.3. Handset Receive Noise17
28、6.3.4. Handset Receive Single Frequency Interference.18 6.4. HANDSET RECEIVE COMFORT NOISE (ADVISORY) .18 6.4.1. General 18 6.4.2. Measurement Method 18 6.4.3. Requirement.19 6.5. HANDSET DISTORTION AND NOISE .19 6.5.1. Handset Send Distortion and Noise.19 6.5.2. Handset Receive Distortion and Noise
29、20 6.6. WEIGHTED TERMINAL COUPLING LOSS (TCLW).20 6.6.1. Measurement Method 21 6.6.2. Requirements.21 6.7. STABILITY LOSS .22 6.7.1. Measurement Method 22 6.7.2. Requirement.22 6.8. LONG DURATION MAXIMUM ACOUSTIC PRESSURE (STEADY STATE INPUT) .23 6.8.1. General 23 6.8.2. Measurement Method 23 6.8.3.
30、 Requirements.23 6.9. SHORT DURATION MAXIMUM ACOUSTIC PRESSURE (PEAK) 24 6.9.1. General 24 6.9.2. Measurement Method 24 6.9.3. Requirements.24 6.10. VOIP TELEPHONE DELAY24 6.10.1. Requirement24 6.10.2. Handset Send Delay24 6.10.3. Handset Receive Delay.25 7. HEADSET TECHNICAL REQUIREMENTS26 7.1. HEA
31、DSET FREQUENCY RESPONSE .26 7.1.1. Headset Send Frequency Response .26 7.1.2. Headset Receive Frequency Response 27 7.2. HEADSET LOUDNESS RATINGS 28 7.2.1. Headset Send Loudness Rating (SLR) 28 7.2.2. Headset Receive Loudness Rating (RLR) .29 7.2.3. Headset Talker Sidetone (STMR) .29 7.3. HEADSET NO
32、ISE30 7.3.1. Headset Send Noise.30 7.3.2. Headset Send Single Frequency Interference30 7.3.3. Headset Receive Noise 30 7.3.4. Headset Receive Single Frequency Interference .31 7.4. HEADSET DISTORTION AND NOISE31 7.4.1. Headset Send Distortion and Noise .31 7.4.2. Headset Receive Distortion and Noise
33、 32 7.5. WEIGHTED TERMINAL COUPLING LOSS (TCLW).32 ANSI/TIA-810-B iii 7.5.1. Measurement Method . 32 7.5.2. Requirements 33 7.6. LONG DURATION MAXIMUM ACOUSTIC PRESSURE (STEADY STATE INPUT). 34 7.6.1. General 34 7.6.2. Measurement Method . 34 7.6.3. Requirements 34 7.7. SHORT DURATION (PEAK) ACOUSTI
34、C PRESSURE 34 7.7.1. General 34 7.7.2. Measurement Method . 34 7.7.3. Requirements 34 8. HANDSFREE TECHNICAL REQUIREMENTS 35 8.1. HANDSFREE FREQUENCY RESPONSE 35 8.1.1. Handsfree Send Frequency Response . 35 8.1.2. Handsfree Receive Frequency Response 37 8.2. HANDSFREE LOUDNESS RATINGS AND RECEIVE V
35、OLUME CONTROL. 38 8.2.1. Handsfree Send Loudness Rating (SLR) 38 8.2.2. Handsfree Receive Loudness Rating (RLR) . 39 8.2.3. Handsfree Receive Volume Control . 39 8.3. HANDSFREE NOISE 39 8.3.1. Handsfree Send Noise. 39 8.3.2. Handsfree Send Single Frequency Interference 40 8.3.3. Handsfree Receive No
36、ise 40 8.3.4. Handsfree Receive Single Frequency Interference . 40 8.4. HANDSFREE DISTORTION AND NOISE 41 8.4.1. Handsfree Send Distortion and Noise. 41 8.4.2. Handsfree Receive Distortion and Noise 41 8.5. WEIGHTED TERMINAL COUPLING LOSS (TCLW) 42 8.5.1. Measurement Method . 42 8.5.2. Requirements
37、42 8.6. STABILITY LOSS. 43 8.6.1. Measurement Method . 43 8.6.2. Requirement 43 ANNEX A (NORMATIVE) CALCULATION OF LOUDNESS RATINGS. 44 ANNEX B (INFORMATIVE) MEASUREMENT AND LEVEL CONVERSIONS. 47 ANNEX C (INFORMATIVE) PREFERRED 1/12THOCTAVE FREQUENCIES. 49 ANNEX D (INFORMATIVE) NOMINAL HANDSET FREQU
38、ENCY RESPONSE DERIVATION 50 ANNEX E (INFORMATIVE) SDN ERRONEOUS RESULT EXAMPLE. 64 ANNEX F (INFORMATIVE) BIBLIOGRAPHY . 65 ANSI/TIA-810-B iv 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
39、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 ANSI/TIA/EIA-810-A. The TR-41.3.3 VoIP/PCM Transmissio
40、n Performance Working Group acknowledges the contribution made by the following individuals in the development of this standard. Name Representing Ken Macdonald Microtronix Systems Ltd. Chair Roger Britt Nortel Editor John Bareham Consultant in Electroacoustics Al Baum Uniden Ruchir Dave Cisco Syste
41、ms Miguel DeAraujo Nortel Steve Graham Plantronics Tom Harley Texas Instruments Glenn Hess MWM Acoustics Ron Magnuson Acoustics for Communications Kirit Patel Cisco Systems Joachim Pomy Avaya Amar N. Ray Embarq Allen Woo Plantronics Bob Young IEEE STIT Copyrighted parts of ITU-T Recommendation P.79
42、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 four annexes in this Standard are informative and are not considered part of this Standar
43、d. 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 ANSI/TIA-810-B 1 1. Introduction This revision of ANSI/TIA/EIA-810-A establishes handset, headset and
44、 handsfree telephone audio performance requirements for digital telephones regardless of protocol or digital format. A number of improvements and corrections have been made, particularly related to the use of ear simulators. This standard addresses conventional narrowband performance, where narrowba
45、nd is defined as the frequency range between 300 and 3400 Hz. Requirements for wideband telephony, in the frequency range between 150 and 6800 Hz are defined in TIA-920. ANSI/TIA-810-B 2 2. Scope This standard establishes voice performance requirements for narrowband digital telephones and devices.
46、Transmission may be over any digital interface including wired, or wireless, Local or Wide Area Networks, Firewire/IEEE Std 1394, Universal Serial Bus (USB), public ISDN or digital over twisted pair wire. This includes TDM-based and packet-based (e.g. VoIP) telephones. These telephones may be connec
47、ted through modems, Voice Gateways, wireless access points, PBXs, or personal computer-based telephones. Examples include: ISDN telephones, digital proprietary telephones, VoIP telephones (corded and cordless), softphones (such as laptop computers), IEEE 802.11 telephones, USB telephones, USB device
48、s, DECT telephones, BluetoothTelephones and Bluetooth devices. In principle, this document can be used to evaluate wireless devices and other devices where the A-law and mu-law codecs are not supported for the full audio channel. In this case the targets specified in this standard may not apply. If
49、A-law or mu-law codecs are supported they shall be used for testing to compliance to this standard. For telephone systems that incorporate a Universal Serial Bus (USB) type interface or a Bluetooth type interface to a host (such as laptop computers), it may be desirable for the USB or Bluetooth device to meet the requirements of relevant clauses of this standard, where the host device is assumed to have a 0 dB loss plan, in its default state. It may be desirable for the device to provide gain adjustment for both the send and receive channels. When connected to a
