ETSI EN 300 176-2 V2.3.1 (2019-12)
Digital Enhanced Cordless Telecommunications (DECT); Test specification; Part 2: Audio and speech
Digital Enhanced Cordless Telecommunications (DECT); Test specification; Part 2: Audio and speech
REN/DECT-00343
Digitalne izboljšane brezvrvične telekomunikacije (DECT) - Specifikacija preskusa - 2. del: Zvok in govor
Ta dokument določa preskuse, ki se uporabljajo za vso opremo za digitalne izboljšane brezvrvične komunikacije (DECT), s katero se dostopa do katerega koli frekvenčnega pasu digitalnih izboljšanih brezvrvičnih komunikacij (vključno z ustreznimi frekvenčnimi pasovi po standardu IMT-2000), ter preskuse, ki se uporabljajo za govor in prenos zvoka prek digitalnih izboljšanih brezvrvičnih komunikacij, za katere se uporabijo kateri koli kodeki in katere koli specifikacije za zvok iz standarda ETSI EN 300 175-8 [8]. Cilj tega dokumenta je zagotoviti:
• učinkovito uporabo frekvenčnega spektra;
• preprečitev poškodb katerega koli priključenega omrežja in njegovih storitev;
• preprečitev poškodb drugih radijskih omrežij in storitev;
• preprečitev poškodb druge opreme za digitalne izboljšane brezvrvične komunikacije ali njenih storitev;
• medsebojno delovanje terminalske opreme prek katerega koli javnega telekomunikacijskega omrežja, vključno z digitalnim omrežjem z integriranimi storitvami (ISDN)/javnim komutiranim telefonskim omrežjem (PSTN) ter internetom,
in sicer s preskušanjem določb standardov od ETSI EN 300 175-1 [1] do ETSI EN 300 175-8 [8], ki zadevajo te cilje. Preskusi iz standarda ETSI EN 300 176 so ločeni na dva dela:
• 1. del [9] zajema preskušanje parametrov radijskih frekvenc, varnostnih elementov in protokolov digitalnih izboljšanih brezvrvičnih komunikacij, ki omogočajo lažje izvajanje preskusov radijskih frekvenc ter učinkovito uporabo frekvenčnega spektra;
• 2. del (ta dokument) opisuje preskušanje zahtev za govor in zvok med omrežnim vmesnikom ter prenosnimi radijskimi priključki digitalnih izboljšanih brezvrvičnih komunikacij (DECT PT) ali med skupnim radijskim vmesnikom digitalnih izboljšanih brezvrvičnih komunikacij (DECT CI) in prenosnim radijskim priključkom digitalnih izboljšanih brezvrvičnih komunikacij (DECT PT) ali alternativno fiksnim radijskim priključkom digitalnih izboljšanih brezvrvičnih komunikacij (DECT FT). Ta dokument se ne uporablja za terminalsko opremo, ki je namenjena posebej za invalide (npr. s povečanjem glasnosti prejetega govora kot pomočjo za naglušne osebe). Terminalska oprema digitalnih izboljšanih brezvrvičnih komunikacij je sestavljena iz naslednjih elementov:
a) fiksni del (FP),
b) prenosni del (PP),
c) brezvrvični terminalski prilagodilnik (CTA),
d) brezžična relejna postaja (WRS) (fiksni in prenosni del skupaj).
Ta dokument omogoča preskušanje:
a) fiksnega in prenosnega dela skupaj ali
b) fiksnega in prenosnega dela kot ločenih elementov.
Kadar je fiksni del digitalnih izboljšanih brezvrvičnih komunikacij povezan z javnim komutiranim telefonskim omrežjem, zahteve pa določajo posebnosti za glasovno telefonijo, bodo te vključene v fiksni del.
General Information
Overview
ETSI EN 300 176-2 V2.3.1 (2019-12) (ETSI EN 300 176-2 V2.3.1) is the DECT (Digital Enhanced Cordless Telecommunications) test specification - Part 2: Audio and speech. It specifies the tests for DECT equipment accessing any DECT frequency band (including applicable IMT‑2000 bands) and for DECT speech/audio transmission using the codecs and audio specifications referenced in ETSI EN 300 175‑8. The standard’s aims are to ensure efficient spectrum use, protect networks and other radio services from interference, support DECT-to-network interworking (ISDN/PSTN/Internet), and validate speech/audio performance of Fixed Parts (FP), Portable Parts (PP), Cordless Terminal Adapters (CTA) and Wireless Relay Stations (WRS).
Key topics and technical requirements
- Scope of audio/speech testing: Tests between network interfaces and DECT PTs or between DECT CI air interface and PT/FT; structured to test FP and PP together or separately. (Not applicable to devices specifically designed for the disabled.)
- Audio types and codecs: Coverage of narrowband, wideband, super-wideband and fullband audio types and their mapping to codecs (document references codecs such as G.711, G.726, G.722, G.729.1, MPEG‑AAC and LC3plus).
- Test setups and instrumentation: Use of low-noise rooms, artificial mouth/ear, Head and Torso Simulator (HATS), Lower Tester (LT) and calibrated measurement chains.
- Performance test areas: Hands‑free/loudspeaking mode, handset/headset positioning, background noise simulation, echo path variability, digital signal levels, and positional robustness.
- Ideal/reference codecs and measurement interpretation: Definitions of ideal codec behavior for objective test comparisons and guidance on interpreting measurement results and uncertainties.
- General test conditions: Power/environment limits, applicant declarations regarding speech coding algorithms and TAP in the FP, and test configurations for complete DECT systems or individual components.
Practical applications and users
- Device manufacturers: Validate DECT handsets, base stations (FP), CTAs and WRS against audio/speech performance and regulatory requirements.
- Test laboratories: Implement standardized test methods (HATS, LT setups, echo/background noise simulations) to produce reproducible compliance evidence.
- Regulatory authorities and certification bodies: Assess conformity to DECT audio/speech requirements and ensure coexistence with other radio services.
- Network operators and integrators: Verify interworking (PSTN/ISDN/Internet) and voice quality across DECT deployments.
Related standards
- ETSI EN 300 176‑1 (Part 1 - RF, security and protocol tests)
- ETSI EN 300 175‑1 to EN 300 175‑8 (DECT system and audio specifications)
- Other referenced codec standards (G.711, G.722, G.726, G.729.1, MPEG‑AAC, LC3plus)
Keywords: DECT test specification, audio and speech testing, ETSI EN 300 176‑2, DECT codecs, HATS, hands‑free testing, speech quality, DECT compliance.
Standards Content (Sample)
Draft ETSI EN 300 176-2 V2.2.7 (2019-08)
EUROPEAN STANDARD
Digital Enhanced Cordless Telecommunications (DECT);
Test specification;
Part 2: Audio and speech
2 Draft ETSI EN 300 176-2 V2.2.7 (2019-08)
Reference
REN/DECT-00343
Keywords
7 kHz, audio, codec, DECT, handsfree,
IMT-2000, loudspeaking, mobility, narrowband,
quality, radio, regulation, speech, superwideband,
TDD, TDMA, telephony, terminal, testing, voice,
wideband
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88
Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI
deliverable is the one made publicly available in PDF format at www.etsi.org/deliver.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
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If you find errors in the present document, please send your comment to one of the following services:
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Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying
and microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.
© ETSI 2019.
All rights reserved.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its Members.
3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and
of the oneM2M Partners. ®
GSM and the GSM logo are trademarks registered and owned by the GSM Association.
ETSI
3 Draft ETSI EN 300 176-2 V2.2.7 (2019-08)
Contents
Intellectual Property Rights . 16
Foreword . 16
Modal verbs terminology . 17
1 Scope . 18
2 References . 19
2.1 Normative references . 19
2.2 Informative references . 22
3 Definition of terms, symbols and abbreviations . 24
3.1 Terms . 24
3.2 Symbols . 27
3.3 Abbreviations . 27
4 Interpretation of the measurement results . 29
5 General test requirements . 29
5.0 General . 29
5.1 Test philosophy . 30
5.1.1 Testable items . 30
5.1.2 Testing of the codecs . 30
5.1.3 Testing of the audio types . 30
5.1.4 Devices with analog line interfaces . 30
5.1.5 Equipment supporting an ETSI approved profile . 30
5.1.6 Equipment not supporting an ETSI approved profile . 31
5.1.7 Applicant's declaration . 32
6 General testing conditions . 32
6.1 Low noise room . 32
6.2 Lower Tester (LT) . 32
6.2.1 Description . 32
6.2.2 Connections between the EUT and the LT . 32
6.2.3 Functions and abilities . 33
6.2.4 Measurement uncertainty . 33
6.3 Power and environment . 33
6.3.1 Environment for tests . 33
6.3.2 Power supply limitations . 33
6.3.3 Power source . 33
6.4 Test configurations . 34
6.4.1 General . 34
6.4.2 Testing a DECT system . 34
6.4.3 Testing a separate PP or FP . 34
6.4.4 Reference FP (ReFP) and Reference PP (RePP). 35
6.5 Digital signal levels . 36
6.5.1 Digital signal levels for codecs G.711 and G.726 . 36
6.6 General test conditions . 36
6.7 Ideal codecs (for codecs G.726, G.711, G.722, G.729.1, MPEG-AAC and LC3plus) . 37
6.7.0 General . 37
6.7.1 Ideal codec for codecs G.726, G.711 and LC3plus in NB mode . 37
6.7.2 Ideal codec for codecs G.722, G.729.1, MPEG-4 and LC3plus (wideband mode) . 38
6.7.3 Ideal codec for MPEG-4 or LC3plus (super-wideband mode) . 39
6.7.4 Ideal codec for LC3plus in fullband mode . 39
6.8 Electro-acoustical equipment . 39
6.8.0 General . 39
6.8.1 Artificial mouth and artificial ear . 39
6.8.2 Head and Torso Simulator (HATS) . 39
6.9 Speech coding scheme . 40
6.9.1 Requirement for speech coding algorithm . 40
ETSI
4 Draft ETSI EN 300 176-2 V2.2.7 (2019-08)
6.9.2 Applicant's declaration on speech coding algorithm . 40
6.9.3 Requirement for the TAP in the FP . 40
6.9.4 Applicant's declaration on the TAP in the FP . 40
6.10 Test setup. 40
6.10.1 Set up for handset type 1a or 1b. 40
6.10.2 Set up for handset type 2a . 40
6.10.3 Set up for handset or headset other than type 1a, 1b or 2a . 41
6.10.3.0 Super-wideband and fullband applications . 41
6.10.3.1 Positioning handset or headset . 41
6.10.3.2 Position and calibration of HATS . 41
6.10.4 Set up for hands-free measurements . 42
6.10.4.0 Super-wideband and fullband applications . 42
6.10.4.1 Positioning handsfree . 43
6.10.4.2 Position and calibration of HATS . 49
6.10.4.2.1 Sending . 49
6.10.4.2.2 Receiving . 49
6.10.5 Set up for measurements in loudspeaking mode . 50
6.10.6 Setup for background noise simulation . 50
6.10.7 Setup of variable echo path . 51
6.10.8 Setup for testing positional robustness of handsets. 53
7 Test of audio specifications . 54
7.1 Overall description . 54
7.1.1 Introduction to DECT audio specifications . 54
7.1.2 Introduction to the audio types . 54
7.1.3 List of Audio types . 55
7.1.4 Audio types for Portable Parts . 56
7.1.5 Audio types for Fixed Parts . 57
7.1.6 Complete DECT system . 57
7.1.7 Structure of the specification of the audio types . 58
7.1.8 Audio Types and codecs . 65
7.1.9 Audio Types and physical interfaces . 65
7.2 Audio types applicable to Portable Parts . 66
7.2.0 General . 66
7.2.1 Performance levels of DECT Portable Parts (handsets). 66
7.2.2 Type 0: Reference PP (RePP) . 67
7.2.3 PP Type 1a: "Classic" GAP narrowband handset . 67
7.2.3.1 Introduction . 67
7.2.3.2 Compatible services and codecs . 67
7.2.3.3 Specification. 68
7.2.4 PP Type 1b: "Improved" GAP narrowband handset . 68
7.2.4.1 Introduction . 68
7.2.4.2 Compatible services and codecs . 68
7.2.4.3 Specification. 68
7.2.5 PP Type 1c: HATS-tested "standard" narrowband handset . 68
7.2.5.1 Introduction . 68
7.2.5.2 Compatible services and codecs . 68
7.2.5.3 Specification. 69
7.2.6 PP Type 1d: HATS-tested "improved" narrowband handset . 69
7.2.6.1 Introduction . 69
7.2.6.2 Compatible services and codecs . 69
7.2.6.3 Specification. 69
7.2.7 PP Type 3a: HATS tested narrowband "standard" loudspeaking handsfree . 69
7.2.7.1 Introduction . 69
7.2.7.2 Compatible services and codecs . 70
7.2.7.3 Specification. 70
7.2.8 PP Type 3b: HATS tested narrowband "improved" loudspeaking handsfree . 70
7.2.8.1 Introduction . 70
7.2.8.2 Compatible services and codecs . 70
7.2.8.3 Specification. 70
7.2.9 PP Type 2a: P.311-tested wideband handset. 70
7.2.9.1 Introduction . 70
ETSI
5 Draft ETSI EN 300 176-2 V2.2.7 (2019-08)
7.2.9.2 Compatible services and codecs . 70
7.2.9.3 Specification. 70
7.2.10 PP Type 2b: HATS-tested "standard" wideband handset or headset . 71
7.2.10.1 Introduction . 71
7.2.10.2 Compatible services and codecs . 71
7.2.10.3 Specification. 71
7.2.11 PP Type 2c: HATS tested "improved" wideband handset or headset . 71
7.2.11.1 Introduction . 71
7.2.11.2 Compatible services and codecs . 71
7.2.11.3 Specification. 71
7.2.12 PP Type 4a: HATS tested wideband "standard" loudspeaking handsfree . 72
7.2.12.1 Introduction . 72
7.2.12.2 Compatible services and codecs . 72
7.2.12.3 Specification. 72
7.2.13 PP Type 4b: HATS tested wideband "improved" loudspeaking and handsfree . 72
7.2.13.1 Introduction . 72
7.2.13.2 Compatible services and codecs . 72
7.2.13.3 Specification. 73
7.2.14 PP Type 5a: super-wideband 14 kHz handset or headset. 73
7.2.14.1 Introduction . 73
7.2.14.2 Compatible services and codecs . 73
7.2.14.3 Specification. 73
7.2.15 PP Type 5b: super-wideband 14 kHz loudspeaking handsfree . 73
7.2.15.1 Introduction . 73
7.2.15.2 Compatible services and codecs . 73
7.2.15.3 Specification. 73
7.2.16 PP Type 6: PPs with external 2 wire, 3,1 kHz telephony interface . 73
7.2.16.1 Introduction . 73
7.2.16.2 Compatible services and codecs . 73
7.2.16.3 Specification. 73
7.2.17 PP Type 7a: fullband 20 kHz handset or headset . 74
7.2.17.1 Introduction . 74
7.2.17.2 Compatible services and codecs . 74
7.2.17.3 Specification. 74
7.2.18 PP Type 7b: fullband 20 kHz loudspeaking handsfree . 74
7.2.18.1 Introduction . 74
7.2.18.2 Compatible services and codecs . 74
7.2.18.3 Specification. 74
7.2.19 PP Type 7c, d, e: fullband 20 kHz stereo audio device . 74
7.2.19.1 Introduction . 74
7.2.19.2 Compatible services and codecs . 74
7.2.19.3 Specification. 74
7.3 Audio transmission types applicable to Fixed Parts . 75
7.3.0 General . 75
7.3.1 FP Type 0: Reference FP (ReFP) . 75
7.3.2 FP Type 1a: "classical" Fixed Part for ISDN Network . 76
7.3.2.1 Introduction . 76
7.3.2.2 Compatible services and codecs . 76
7.3.2.3 Specifications . 76
7.3.2.3.1 Transcoding and equalization . 76
7.3.2.3.2 PP type detection . 77
7.3.2.3.3 Activation of audio processing functions . 77
7.3.2.3.4 Transmission specification . 77
7.3.3 FP Type 1b: Fixed Part for ISDN Network . 77
7.3.3.1 Introduction . 77
7.3.3.2 Compatible services and codecs . 77
7.3.3.3 Specification. 78
7.3.3.3.1 Transcoding and equalization . 78
7.3.3.3.2 PP type detection . 78
7.3.3.3.3 Activation of audio processing functions . 78
7.3.3.3.4 Transmission specification . 79
7.3.4 FP Type 2: FP with analog 2-wire interface, 3,1 kHz service . 79
ETSI
6 Draft ETSI EN 300 176-2 V2.2.7 (2019-08)
7.3.4.1 Introduction . 79
7.3.4.2 Compatible services, physical interfaces and codecs . 79
7.3.4.3 Specification. 79
7.3.4.3.1 Transcoding, equalization and conversion . 79
7.3.4.3.2 PP type detection and activation of audio processing functions . 79
7.3.4.3.3 Transmission specification . 80
7.3.5 FP Type 3: VoIP narrowband Fixed Part . 80
7.3.5.1 Introduction . 80
7.3.5.2 Compatible services, physical interfaces and codecs . 80
7.3.5.3 Specification. 81
7.3.5.3.1 Transcoding and equalization . 81
7.3.5.3.2 PP type detection . 81
7.3.5.3.3 Activation of audio processing functions . 81
7.3.5.3.4 Transmission specification . 82
7.3.6 FP Type 4: ISDN wideband Fixed Part . 82
7.3.6.1 Introduction . 82
7.3.6.2 Compatible services and codecs . 82
7.3.6.3 Specification. 82
7.3.6.3.1 Transcoding and equalization . 82
7.3.6.3.2 PP type detection . 82
7.3.6.3.3 Activation of audio processing functions . 83
7.3.6.3.4 Transmission specification . 83
7.3.7 FP Type 5: VoIP wideband, super-wideband or fullband Fixed Part . 83
7.3.7.1 Introduction . 83
7.3.7.2 Compatible services, physical interfaces and codecs . 84
7.3.7.3 Specification. 84
7.3.7.3.1 Transcoding and equalization . 84
7.3.7.3.2 PP type detection . 84
7.3.7.3.3 Activation of audio processing functions . 85
7.3.7.3.4 Transmission specification . 85
7.3.8 FP Type 6a: FP handling an Internal call inside a DECT FP (any service) . 85
7.3.8.1 Introduction . 85
7.3.8.2 Compatible services, physical interfaces and codecs . 85
7.3.8.3 Specification. 86
7.3.9 FP Type 6b: FP handling an n-party conference inside a DECT FP (any service) . 86
7.3.9.1 Introduction . 86
7.3.9.2 Compatible services, physical interfaces and codecs . 86
7.3.9.3 Specification for the conference bridge. 86
7.3.10 FP Type 7: DECT Repeater Part (REP) . 86
7.3.10.1 Introduction . 86
7.3.10.2 Compatible services, physical interfaces and codecs . 86
7.3.10.3 Specification. 86
7.4 Additional features . 87
7.4.1 Introduction. 87
7.4.2 Echo canceller in Fixed Part . 87
7.4.3 Echo suppressor in Fixed Part. 88
7.5 Transmission characteristics for Portable Parts . 89
7.5.1 Transmission characteristics for Portable Part type 1a ("Classic GAP" handset) . 89
7.5.1.1 PP frequency responses . 89
7.5.1.1.1 Sending . 89
7.5.1.1.2 Receiving . 90
7.5.1.2 PP sending and receiving loudness ratings . 90
7.5.1.2.1 Nominal values . 90
7.5.1.2.2 User-controlled volume control in PP . 91
7.5.1.2.3 PP adaptive volume control . 92
7.5.1.3 Sidetone . 92
7.5.1.3.1 Talker sidetone . 92
7.5.1.3.2 Listener sidetone . 92
7.5.1.4 Terminal coupling loss . 94
7.5.1.4.1 Weighted Terminal Coupling Loss (TCLw) . 94
7.5.1.4.2 Stability loss . 95
7.5.1.5 Distortion . 96
ETSI
7 Draft ETSI EN 300 176-2 V2.2.7 (2019-08)
7.5.1.5.1 Sending . 96
7.5.1.5.2 Receiving . 96
7.5.1.5.3 Sidetone . 97
7.5.1.6 Out of band signals. 97
7.5.1.6.1 Sending (discrimination against out of band input signals) . 97
7.5.1.6.2 Receiving (spurious out of band signals) . 97
7.5.1.7 Noise . 98
7.5.1.7.1 Sending . 98
7.5.1.7.2 Band-limited noise. 98
7.5.1.7.3 Receiving . 98
7.5.1.7.4 Level of sampling frequency (receiving) . 99
7.5.1.8 Acoustic shock . 99
7.5.1.8.1 Continuous signal . 99
7.5.1.8.2 Peak signal . 99
7.5.1.9 PP Delay . 99
7.5.1.10 PP ambient noise rejection . 101
7.5.2 Additional requirements for PP type 1b ("improved GAP" handset) . 101
7.5.2.0 General . 101
7.5.2.1 Terminal coupling loss . 101
7.5.2.1.1 Weighted Terminal Coupling Loss (TCLw) . 101
7.5.2.2 Attenuation Range in Sending Direction during Double Talk A . 102
H,S,dt
7.5.2.3 Attenuation Range in Receiving Direction during Double Talk A . 103
H,R,dt
7.5.2.4 Activation in Sending Direction . 104
7.5.2.5 Activation in Receiving Direction . 105
7.5.3 Transmission characteristics for PP types 1c and 1d (HATS tested, narrowband telephony handsets) . 106
7.5.3.1 Frequency responses . 106
7.5.3.1.1 Sending . 106
7.5.3.1.2 Receiving . 108
7.5.3.2 Sending and receiving loudness ratings . 111
7.5.3.2.1 Nominal values . 111
7.5.3.2.2 Void . 112
7.5.3.2.3 Void . 112
7.5.3.2.4 Microphone mute.
...
EUROPEAN STANDARD
Digital Enhanced Cordless Telecommunications (DECT);
Test specification;
Part 2: Audio and speech
2 ETSI EN 300 176-2 V2.3.1 (2019-12)
Reference
REN/DECT-00343
Keywords
7 kHz, audio, codec, DECT, handsfree, IMT-
2000, loudspeaking, mobility, narrowband,
quality, radio, regulation, speech, superwideband,
TDD, TDMA, telephony, terminal, testing, voice,
wideband
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88
Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI
deliverable is the one made publicly available in PDF format at www.etsi.org/deliver.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx
If you find errors in the present document, please send your comment to one of the following services:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying
and microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.
© ETSI 2019.
All rights reserved.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its Members.
3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and
of the oneM2M Partners. ®
GSM and the GSM logo are trademarks registered and owned by the GSM Association.
ETSI
3 ETSI EN 300 176-2 V2.3.1 (2019-12)
Contents
Intellectual Property Rights . 16
Foreword . 16
Modal verbs terminology . 17
1 Scope . 18
2 References . 19
2.1 Normative references . 19
2.2 Informative references . 22
3 Definition of terms, symbols and abbreviations . 24
3.1 Terms . 24
3.2 Symbols . 27
3.3 Abbreviations . 27
4 Interpretation of the measurement results . 29
5 General test requirements . 29
5.0 General . 29
5.1 Test philosophy . 30
5.1.1 Testable items . 30
5.1.2 Testing of the codecs . 30
5.1.3 Testing of the audio types . 30
5.1.4 Devices with analog line interfaces . 30
5.1.5 Equipment supporting an ETSI approved profile . 30
5.1.6 Equipment not supporting an ETSI approved profile . 31
5.1.7 Applicant's declaration . 32
6 General testing conditions . 32
6.1 Low noise room . 32
6.2 Lower Tester (LT) . 32
6.2.1 Description . 32
6.2.2 Connections between the EUT and the LT . 32
6.2.3 Functions and abilities . 33
6.2.4 Measurement uncertainty . 33
6.3 Power and environment . 33
6.3.1 Environment for tests . 33
6.3.2 Power supply limitations . 33
6.3.3 Power source . 33
6.4 Test configurations . 34
6.4.1 General . 34
6.4.2 Testing a DECT system . 34
6.4.3 Testing a separate PP or FP . 34
6.4.4 Reference FP (ReFP) and Reference PP (RePP). 35
6.5 Digital signal levels . 36
6.5.1 Digital signal levels for codecs G.711 and G.726 . 36
6.6 General test conditions . 36
6.7 Ideal codecs (for codecs G.726, G.711, G.722, G.729.1, MPEG-AAC and LC3plus) . 37
6.7.0 General . 37
6.7.1 Ideal codec for codecs G.726, G.711 and LC3plus in NB mode . 37
6.7.2 Ideal codec for codecs G.722, G.729.1, MPEG-4 and LC3plus (wideband mode) . 38
6.7.3 Ideal codec for MPEG-4 or LC3plus (super-wideband mode) . 39
6.7.4 Ideal codec for LC3plus in fullband mode . 39
6.8 Electro-acoustical equipment . 39
6.8.0 General . 39
6.8.1 Artificial mouth and artificial ear . 39
6.8.2 Head and Torso Simulator (HATS) . 39
6.9 Speech coding scheme . 40
6.9.1 Requirement for speech coding algorithm . 40
ETSI
4 ETSI EN 300 176-2 V2.3.1 (2019-12)
6.9.2 Applicant's declaration on speech coding algorithm . 40
6.9.3 Requirement for the TAP in the FP . 40
6.9.4 Applicant's declaration on the TAP in the FP . 40
6.10 Test setup. 40
6.10.1 Set up for handset type 1a or 1b. 40
6.10.2 Set up for handset type 2a . 40
6.10.3 Set up for handset or headset other than type 1a, 1b or 2a . 41
6.10.3.0 Super-wideband and fullband applications . 41
6.10.3.1 Positioning handset or headset . 41
6.10.3.2 Position and calibration of HATS . 41
6.10.4 Set up for hands-free measurements . 42
6.10.4.0 Super-wideband and fullband applications . 42
6.10.4.1 Positioning handsfree . 43
6.10.4.2 Position and calibration of HATS . 49
6.10.4.2.1 Sending . 49
6.10.4.2.2 Receiving . 49
6.10.5 Set up for measurements in loudspeaking mode . 50
6.10.6 Setup for background noise simulation . 50
6.10.7 Setup of variable echo path . 51
6.10.8 Setup for testing positional robustness of handsets. 53
7 Test of audio specifications . 54
7.1 Overall description . 54
7.1.1 Introduction to DECT audio specifications . 54
7.1.2 Introduction to the audio types . 54
7.1.3 List of Audio types . 55
7.1.4 Audio types for Portable Parts . 56
7.1.5 Audio types for Fixed Parts . 57
7.1.6 Complete DECT system . 57
7.1.7 Structure of the specification of the audio types . 58
7.1.8 Audio Types and codecs . 65
7.1.9 Audio Types and physical interfaces . 65
7.2 Audio types applicable to Portable Parts . 66
7.2.0 General . 66
7.2.1 Performance levels of DECT Portable Parts (handsets). 66
7.2.2 Type 0: Reference PP (RePP) . 67
7.2.3 PP Type 1a: "Classic" GAP narrowband handset . 67
7.2.3.1 Introduction . 67
7.2.3.2 Compatible services and codecs . 67
7.2.3.3 Specification. 68
7.2.4 PP Type 1b: "Improved" GAP narrowband handset . 68
7.2.4.1 Introduction . 68
7.2.4.2 Compatible services and codecs . 68
7.2.4.3 Specification. 68
7.2.5 PP Type 1c: HATS-tested "standard" narrowband handset . 68
7.2.5.1 Introduction . 68
7.2.5.2 Compatible services and codecs . 68
7.2.5.3 Specification. 69
7.2.6 PP Type 1d: HATS-tested "improved" narrowband handset . 69
7.2.6.1 Introduction . 69
7.2.6.2 Compatible services and codecs . 69
7.2.6.3 Specification. 69
7.2.7 PP Type 3a: HATS tested narrowband "standard" loudspeaking handsfree . 69
7.2.7.1 Introduction . 69
7.2.7.2 Compatible services and codecs . 70
7.2.7.3 Specification. 70
7.2.8 PP Type 3b: HATS tested narrowband "improved" loudspeaking handsfree . 70
7.2.8.1 Introduction . 70
7.2.8.2 Compatible services and codecs . 70
7.2.8.3 Specification. 70
7.2.9 PP Type 2a: P.311-tested wideband handset. 70
7.2.9.1 Introduction . 70
ETSI
5 ETSI EN 300 176-2 V2.3.1 (2019-12)
7.2.9.2 Compatible services and codecs . 70
7.2.9.3 Specification. 70
7.2.10 PP Type 2b: HATS-tested "standard" wideband handset or headset . 71
7.2.10.1 Introduction . 71
7.2.10.2 Compatible services and codecs . 71
7.2.10.3 Specification. 71
7.2.11 PP Type 2c: HATS tested "improved" wideband handset or headset . 71
7.2.11.1 Introduction . 71
7.2.11.2 Compatible services and codecs . 71
7.2.11.3 Specification. 71
7.2.12 PP Type 4a: HATS tested wideband "standard" loudspeaking handsfree . 72
7.2.12.1 Introduction . 72
7.2.12.2 Compatible services and codecs . 72
7.2.12.3 Specification. 72
7.2.13 PP Type 4b: HATS tested wideband "improved" loudspeaking and handsfree . 72
7.2.13.1 Introduction . 72
7.2.13.2 Compatible services and codecs . 72
7.2.13.3 Specification. 73
7.2.14 PP Type 5a: super-wideband 14 kHz handset or headset. 73
7.2.14.1 Introduction . 73
7.2.14.2 Compatible services and codecs . 73
7.2.14.3 Specification. 73
7.2.15 PP Type 5b: super-wideband 14 kHz loudspeaking handsfree . 73
7.2.15.1 Introduction . 73
7.2.15.2 Compatible services and codecs . 73
7.2.15.3 Specification. 73
7.2.16 PP Type 6: PPs with external 2 wire, 3,1 kHz telephony interface . 73
7.2.16.1 Introduction . 73
7.2.16.2 Compatible services and codecs . 73
7.2.16.3 Specification. 73
7.2.17 PP Type 7a: fullband 20 kHz handset or headset . 74
7.2.17.1 Introduction . 74
7.2.17.2 Compatible services and codecs . 74
7.2.17.3 Specification. 74
7.2.18 PP Type 7b: fullband 20 kHz loudspeaking handsfree . 74
7.2.18.1 Introduction . 74
7.2.18.2 Compatible services and codecs . 74
7.2.18.3 Specification. 74
7.2.19 PP Type 7c, d, e: fullband 20 kHz stereo audio device . 74
7.2.19.1 Introduction . 74
7.2.19.2 Compatible services and codecs . 74
7.2.19.3 Specification. 74
7.3 Audio transmission types applicable to Fixed Parts . 75
7.3.0 General . 75
7.3.1 FP Type 0: Reference FP (ReFP) . 75
7.3.2 FP Type 1a: "classical" Fixed Part for ISDN Network . 76
7.3.2.1 Introduction . 76
7.3.2.2 Compatible services and codecs . 76
7.3.2.3 Specifications . 76
7.3.2.3.1 Transcoding and equalization . 76
7.3.2.3.2 PP type detection . 77
7.3.2.3.3 Activation of audio processing functions . 77
7.3.2.3.4 Transmission specification . 77
7.3.3 FP Type 1b: Fixed Part for ISDN Network . 77
7.3.3.1 Introduction . 77
7.3.3.2 Compatible services and codecs . 77
7.3.3.3 Specification. 78
7.3.3.3.1 Transcoding and equalization . 78
7.3.3.3.2 PP type detection . 78
7.3.3.3.3 Activation of audio processing functions . 78
7.3.3.3.4 Transmission specification . 79
7.3.4 FP Type 2: FP with analog 2-wire interface, 3,1 kHz service . 79
ETSI
6 ETSI EN 300 176-2 V2.3.1 (2019-12)
7.3.4.1 Introduction . 79
7.3.4.2 Compatible services, physical interfaces and codecs . 79
7.3.4.3 Specification. 79
7.3.4.3.1 Transcoding, equalization and conversion . 79
7.3.4.3.2 PP type detection and activation of audio processing functions . 79
7.3.4.3.3 Transmission specification . 80
7.3.5 FP Type 3: VoIP narrowband Fixed Part . 80
7.3.5.1 Introduction . 80
7.3.5.2 Compatible services, physical interfaces and codecs . 80
7.3.5.3 Specification. 81
7.3.5.3.1 Transcoding and equalization . 81
7.3.5.3.2 PP type detection . 81
7.3.5.3.3 Activation of audio processing functions . 81
7.3.5.3.4 Transmission specification . 82
7.3.6 FP Type 4: ISDN wideband Fixed Part . 82
7.3.6.1 Introduction . 82
7.3.6.2 Compatible services and codecs . 82
7.3.6.3 Specification. 82
7.3.6.3.1 Transcoding and equalization . 82
7.3.6.3.2 PP type detection . 82
7.3.6.3.3 Activation of audio processing functions . 83
7.3.6.3.4 Transmission specification . 83
7.3.7 FP Type 5: VoIP wideband, super-wideband or fullband Fixed Part . 83
7.3.7.1 Introduction . 83
7.3.7.2 Compatible services, physical interfaces and codecs . 84
7.3.7.3 Specification. 84
7.3.7.3.1 Transcoding and equalization . 84
7.3.7.3.2 PP type detection . 84
7.3.7.3.3 Activation of audio processing functions . 85
7.3.7.3.4 Transmission specification . 85
7.3.8 FP Type 6a: FP handling an Internal call inside a DECT FP (any service) . 85
7.3.8.1 Introduction . 85
7.3.8.2 Compatible services, physical interfaces and codecs . 85
7.3.8.3 Specification. 86
7.3.9 FP Type 6b: FP handling an n-party conference inside a DECT FP (any service) . 86
7.3.9.1 Introduction . 86
7.3.9.2 Compatible services, physical interfaces and codecs . 86
7.3.9.3 Specification for the conference bridge. 86
7.3.10 FP Type 7: DECT Repeater Part (REP) . 86
7.3.10.1 Introduction . 86
7.3.10.2 Compatible services, physical interfaces and codecs . 86
7.3.10.3 Specification. 86
7.4 Additional features . 87
7.4.1 Introduction. 87
7.4.2 Echo canceller in Fixed Part . 87
7.4.3 Echo suppressor in Fixed Part. 88
7.5 Transmission characteristics for Portable Parts . 89
7.5.1 Transmission characteristics for Portable Part type 1a ("Classic GAP" handset) . 89
7.5.1.1 PP frequency responses . 89
7.5.1.1.1 Sending . 89
7.5.1.1.2 Receiving . 90
7.5.1.2 PP sending and receiving loudness ratings . 90
7.5.1.2.1 Nominal values . 90
7.5.1.2.2 User-controlled volume control in PP . 91
7.5.1.2.3 PP adaptive volume control . 92
7.5.1.3 Sidetone . 92
7.5.1.3.1 Talker sidetone . 92
7.5.1.3.2 Listener sidetone . 92
7.5.1.4 Terminal coupling loss . 94
7.5.1.4.1 Weighted Terminal Coupling Loss (TCLw) . 94
7.5.1.4.2 Stability loss . 95
7.5.1.5 Distortion . 96
ETSI
7 ETSI EN 300 176-2 V2.3.1 (2019-12)
7.5.1.5.1 Sending . 96
7.5.1.5.2 Receiving . 96
7.5.1.5.3 Sidetone . 97
7.5.1.6 Out of band signals. 97
7.5.1.6.1 Sending (discrimination against out of band input signals) . 97
7.5.1.6.2 Receiving (spurious out of band signals) . 97
7.5.1.7 Noise . 98
7.5.1.7.1 Sending . 98
7.5.1.7.2 Band-limited noise. 98
7.5.1.7.3 Receiving . 98
7.5.1.7.4 Level of sampling frequency (receiving) . 99
7.5.1.8 Acoustic shock . 99
7.5.1.8.1 Continuous signal . 99
7.5.1.8.2 Peak signal . 99
7.5.1.9 PP Delay . 99
7.5.1.10 PP ambient noise rejection . 101
7.5.2 Additional requirements for PP type 1b ("improved GAP" handset) . 101
7.5.2.0 General . 101
7.5.2.1 Terminal coupling loss . 101
7.5.2.1.1 Weighted Terminal Coupling Loss (TCLw) . 101
7.5.2.2 Attenuation Range in Sending Direction during Double Talk A . 102
H,S,dt
7.5.2.3 Attenuation Range in Receiving Direction during Double Talk A . 103
H,R,dt
7.5.2.4 Activation in Sending Direction . 104
7.5.2.5 Activation in Receiving Direction . 105
7.5.3 Transmission characteristics for PP types 1c and 1d (HATS tested, narrowband telephony handsets) . 106
7.5.3.1 Frequency responses . 106
7.5.3.1.1 Sending . 106
7.5.3.1.2 Receiving . 108
7.5.3.2 Sending and receiving loudness ratings . 111
7.5.3.2.1 Nominal values . 111
7.5.3.2.2 Void . 112
7.5.3.2.3 Void . 112
7.5.3.2.4 Microphone mute.
...
SLOVENSKI STANDARD
01-februar-2020
Digitalne izboljšane brezvrvične telekomunikacije (DECT) - Specifikacija preskusa
- 2. del: Zvok in govor
Digital Enhanced Cordless Telecommunications (DECT) - Test specification - Part 2:
Audio and speech
Ta slovenski standard je istoveten z: ETSI EN 300 176-2 V2.3.1 (2019-12)
ICS:
33.070.30 Digitalne izboljšane Digital Enhanced Cordless
brezvrvične telekomunikacije Telecommunications (DECT)
(DECT)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
Digital Enhanced Cordless Telecommunications (DECT);
Test specification;
Part 2: Audio and speech
2 ETSI EN 300 176-2 V2.3.1 (2019-12)
Reference
REN/DECT-00343
Keywords
7 kHz, audio, codec, DECT, handsfree, IMT-
2000, loudspeaking, mobility, narrowband,
quality, radio, regulation, speech, superwideband,
TDD, TDMA, telephony, terminal, testing, voice,
wideband
ETSI
650 Route des Lucioles
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Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88
Important notice
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All rights reserved.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its Members.
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GSM and the GSM logo are trademarks registered and owned by the GSM Association.
ETSI
3 ETSI EN 300 176-2 V2.3.1 (2019-12)
Contents
Intellectual Property Rights . 16
Foreword . 16
Modal verbs terminology . 17
1 Scope . 18
2 References . 19
2.1 Normative references . 19
2.2 Informative references . 22
3 Definition of terms, symbols and abbreviations . 24
3.1 Terms . 24
3.2 Symbols . 27
3.3 Abbreviations . 27
4 Interpretation of the measurement results . 29
5 General test requirements . 29
5.0 General . 29
5.1 Test philosophy . 30
5.1.1 Testable items . 30
5.1.2 Testing of the codecs . 30
5.1.3 Testing of the audio types . 30
5.1.4 Devices with analog line interfaces . 30
5.1.5 Equipment supporting an ETSI approved profile . 30
5.1.6 Equipment not supporting an ETSI approved profile . 31
5.1.7 Applicant's declaration . 32
6 General testing conditions . 32
6.1 Low noise room . 32
6.2 Lower Tester (LT) . 32
6.2.1 Description . 32
6.2.2 Connections between the EUT and the LT . 32
6.2.3 Functions and abilities . 33
6.2.4 Measurement uncertainty . 33
6.3 Power and environment . 33
6.3.1 Environment for tests . 33
6.3.2 Power supply limitations . 33
6.3.3 Power source . 33
6.4 Test configurations . 34
6.4.1 General . 34
6.4.2 Testing a DECT system . 34
6.4.3 Testing a separate PP or FP . 34
6.4.4 Reference FP (ReFP) and Reference PP (RePP). 35
6.5 Digital signal levels . 36
6.5.1 Digital signal levels for codecs G.711 and G.726 . 36
6.6 General test conditions . 36
6.7 Ideal codecs (for codecs G.726, G.711, G.722, G.729.1, MPEG-AAC and LC3plus) . 37
6.7.0 General . 37
6.7.1 Ideal codec for codecs G.726, G.711 and LC3plus in NB mode . 37
6.7.2 Ideal codec for codecs G.722, G.729.1, MPEG-4 and LC3plus (wideband mode) . 38
6.7.3 Ideal codec for MPEG-4 or LC3plus (super-wideband mode) . 39
6.7.4 Ideal codec for LC3plus in fullband mode . 39
6.8 Electro-acoustical equipment . 39
6.8.0 General . 39
6.8.1 Artificial mouth and artificial ear . 39
6.8.2 Head and Torso Simulator (HATS) . 39
6.9 Speech coding scheme . 40
6.9.1 Requirement for speech coding algorithm . 40
ETSI
4 ETSI EN 300 176-2 V2.3.1 (2019-12)
6.9.2 Applicant's declaration on speech coding algorithm . 40
6.9.3 Requirement for the TAP in the FP . 40
6.9.4 Applicant's declaration on the TAP in the FP . 40
6.10 Test setup. 40
6.10.1 Set up for handset type 1a or 1b. 40
6.10.2 Set up for handset type 2a . 40
6.10.3 Set up for handset or headset other than type 1a, 1b or 2a . 41
6.10.3.0 Super-wideband and fullband applications . 41
6.10.3.1 Positioning handset or headset . 41
6.10.3.2 Position and calibration of HATS . 41
6.10.4 Set up for hands-free measurements . 42
6.10.4.0 Super-wideband and fullband applications . 42
6.10.4.1 Positioning handsfree . 43
6.10.4.2 Position and calibration of HATS . 49
6.10.4.2.1 Sending . 49
6.10.4.2.2 Receiving . 49
6.10.5 Set up for measurements in loudspeaking mode . 50
6.10.6 Setup for background noise simulation . 50
6.10.7 Setup of variable echo path . 51
6.10.8 Setup for testing positional robustness of handsets. 53
7 Test of audio specifications . 54
7.1 Overall description . 54
7.1.1 Introduction to DECT audio specifications . 54
7.1.2 Introduction to the audio types . 54
7.1.3 List of Audio types . 55
7.1.4 Audio types for Portable Parts . 56
7.1.5 Audio types for Fixed Parts . 57
7.1.6 Complete DECT system . 57
7.1.7 Structure of the specification of the audio types . 58
7.1.8 Audio Types and codecs . 65
7.1.9 Audio Types and physical interfaces . 65
7.2 Audio types applicable to Portable Parts . 66
7.2.0 General . 66
7.2.1 Performance levels of DECT Portable Parts (handsets). 66
7.2.2 Type 0: Reference PP (RePP) . 67
7.2.3 PP Type 1a: "Classic" GAP narrowband handset . 67
7.2.3.1 Introduction . 67
7.2.3.2 Compatible services and codecs . 67
7.2.3.3 Specification. 68
7.2.4 PP Type 1b: "Improved" GAP narrowband handset . 68
7.2.4.1 Introduction . 68
7.2.4.2 Compatible services and codecs . 68
7.2.4.3 Specification. 68
7.2.5 PP Type 1c: HATS-tested "standard" narrowband handset . 68
7.2.5.1 Introduction . 68
7.2.5.2 Compatible services and codecs . 68
7.2.5.3 Specification. 69
7.2.6 PP Type 1d: HATS-tested "improved" narrowband handset . 69
7.2.6.1 Introduction . 69
7.2.6.2 Compatible services and codecs . 69
7.2.6.3 Specification. 69
7.2.7 PP Type 3a: HATS tested narrowband "standard" loudspeaking handsfree . 69
7.2.7.1 Introduction . 69
7.2.7.2 Compatible services and codecs . 70
7.2.7.3 Specification. 70
7.2.8 PP Type 3b: HATS tested narrowband "improved" loudspeaking handsfree . 70
7.2.8.1 Introduction . 70
7.2.8.2 Compatible services and codecs . 70
7.2.8.3 Specification. 70
7.2.9 PP Type 2a: P.311-tested wideband handset. 70
7.2.9.1 Introduction . 70
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5 ETSI EN 300 176-2 V2.3.1 (2019-12)
7.2.9.2 Compatible services and codecs . 70
7.2.9.3 Specification. 70
7.2.10 PP Type 2b: HATS-tested "standard" wideband handset or headset . 71
7.2.10.1 Introduction . 71
7.2.10.2 Compatible services and codecs . 71
7.2.10.3 Specification. 71
7.2.11 PP Type 2c: HATS tested "improved" wideband handset or headset . 71
7.2.11.1 Introduction . 71
7.2.11.2 Compatible services and codecs . 71
7.2.11.3 Specification. 71
7.2.12 PP Type 4a: HATS tested wideband "standard" loudspeaking handsfree . 72
7.2.12.1 Introduction . 72
7.2.12.2 Compatible services and codecs . 72
7.2.12.3 Specification. 72
7.2.13 PP Type 4b: HATS tested wideband "improved" loudspeaking and handsfree . 72
7.2.13.1 Introduction . 72
7.2.13.2 Compatible services and codecs . 72
7.2.13.3 Specification. 73
7.2.14 PP Type 5a: super-wideband 14 kHz handset or headset. 73
7.2.14.1 Introduction . 73
7.2.14.2 Compatible services and codecs . 73
7.2.14.3 Specification. 73
7.2.15 PP Type 5b: super-wideband 14 kHz loudspeaking handsfree . 73
7.2.15.1 Introduction . 73
7.2.15.2 Compatible services and codecs . 73
7.2.15.3 Specification. 73
7.2.16 PP Type 6: PPs with external 2 wire, 3,1 kHz telephony interface . 73
7.2.16.1 Introduction . 73
7.2.16.2 Compatible services and codecs . 73
7.2.16.3 Specification. 73
7.2.17 PP Type 7a: fullband 20 kHz handset or headset . 74
7.2.17.1 Introduction . 74
7.2.17.2 Compatible services and codecs . 74
7.2.17.3 Specification. 74
7.2.18 PP Type 7b: fullband 20 kHz loudspeaking handsfree . 74
7.2.18.1 Introduction . 74
7.2.18.2 Compatible services and codecs . 74
7.2.18.3 Specification. 74
7.2.19 PP Type 7c, d, e: fullband 20 kHz stereo audio device . 74
7.2.19.1 Introduction . 74
7.2.19.2 Compatible services and codecs . 74
7.2.19.3 Specification. 74
7.3 Audio transmission types applicable to Fixed Parts . 75
7.3.0 General . 75
7.3.1 FP Type 0: Reference FP (ReFP) . 75
7.3.2 FP Type 1a: "classical" Fixed Part for ISDN Network . 76
7.3.2.1 Introduction . 76
7.3.2.2 Compatible services and codecs . 76
7.3.2.3 Specifications . 76
7.3.2.3.1 Transcoding and equalization . 76
7.3.2.3.2 PP type detection . 77
7.3.2.3.3 Activation of audio processing functions . 77
7.3.2.3.4 Transmission specification . 77
7.3.3 FP Type 1b: Fixed Part for ISDN Network . 77
7.3.3.1 Introduction . 77
7.3.3.2 Compatible services and codecs . 77
7.3.3.3 Specification. 78
7.3.3.3.1 Transcoding and equalization . 78
7.3.3.3.2 PP type detection . 78
7.3.3.3.3 Activation of audio processing functions . 78
7.3.3.3.4 Transmission specification . 79
7.3.4 FP Type 2: FP with analog 2-wire interface, 3,1 kHz service . 79
ETSI
6 ETSI EN 300 176-2 V2.3.1 (2019-12)
7.3.4.1 Introduction . 79
7.3.4.2 Compatible services, physical interfaces and codecs . 79
7.3.4.3 Specification. 79
7.3.4.3.1 Transcoding, equalization and conversion . 79
7.3.4.3.2 PP type detection and activation of audio processing functions . 79
7.3.4.3.3 Transmission specification . 80
7.3.5 FP Type 3: VoIP narrowband Fixed Part . 80
7.3.5.1 Introduction . 80
7.3.5.2 Compatible services, physical interfaces and codecs . 80
7.3.5.3 Specification. 81
7.3.5.3.1 Transcoding and equalization . 81
7.3.5.3.2 PP type detection . 81
7.3.5.3.3 Activation of audio processing functions . 81
7.3.5.3.4 Transmission specification . 82
7.3.6 FP Type 4: ISDN wideband Fixed Part . 82
7.3.6.1 Introduction . 82
7.3.6.2 Compatible services and codecs . 82
7.3.6.3 Specification. 82
7.3.6.3.1 Transcoding and equalization . 82
7.3.6.3.2 PP type detection . 82
7.3.6.3.3 Activation of audio processing functions . 83
7.3.6.3.4 Transmission specification . 83
7.3.7 FP Type 5: VoIP wideband, super-wideband or fullband Fixed Part . 83
7.3.7.1 Introduction . 83
7.3.7.2 Compatible services, physical interfaces and codecs . 84
7.3.7.3 Specification. 84
7.3.7.3.1 Transcoding and equalization . 84
7.3.7.3.2 PP type detection . 84
7.3.7.3.3 Activation of audio processing functions . 85
7.3.7.3.4 Transmission specification . 85
7.3.8 FP Type 6a: FP handling an Internal call inside a DECT FP (any service) . 85
7.3.8.1 Introduction . 85
7.3.8.2 Compatible services, physical interfaces and codecs . 85
7.3.8.3 Specification. 86
7.3.9 FP Type 6b: FP handling an n-party conference inside a DECT FP (any service) . 86
7.3.9.1 Introduction . 86
7.3.9.2 Compatible services, physical interfaces and codecs . 86
7.3.9.3 Specification for the conference bridge. 86
7.3.10 FP Type 7: DECT Repeater Part (REP) . 86
7.3.10.1 Introduction . 86
7.3.10.2 Compatible services, physical interfaces and codecs . 86
7.3.10.3 Specification. 86
7.4 Additional features . 87
7.4.1 Introduction. 87
7.4.2 Echo canceller in Fixed Part . 87
7.4.3 Echo suppressor in Fixed Part. 88
7.5 Transmission characteristics for Portable Parts . 89
7.5.1 Transmission characteristics for Portable Part type 1a ("Classic GAP" handset) . 89
7.5.1.1 PP frequency responses . 89
7.5.1.1.1 Sending . 89
7.5.1.1.2 Receiving . 90
7.5.1.2 PP sending and receiving loudness ratings . 90
7.5.1.2.1 Nominal values . 90
7.5.1.2.2 User-controlled volume control in PP . 91
7.5.1.2.3 PP adaptive volume control . 92
7.5.1.3 Sidetone . 92
7.5.1.3.1 Talker sidetone . 92
7.5.1.3.2 Listener sidetone . 92
7.5.1.4 Terminal coupling loss . 94
7.5.1.4.1 Weighted Terminal Coupling Loss (TCLw) . 94
7.5.1.4.2 Stability loss . 95
7.5.1.5 Distortion . 96
ETSI
7 ETSI EN 300 176-2 V2.3.1 (2019-12)
7.5.1.5.1 Sending . 96
7.5.1.5.2 Receiving . 96
7.5.1.5.3 Sidetone . 97
7.5.1.6 Out of band signals. 97
7.5.1.6.1 Sending (discrimination against out of band input signals) . 97
7.5.1.6.2 Receiving (spurious out of band signals) . 97
7.5.1.7 Noise . 98
7.5.1.7.1 Sending . 98
7.5.1.7.2 Band-limited noise. 98
7.5.1.7.3 Receiving . 98
7.5.1.7.4 Level of sampling frequency (receiving) . 99
7.5.1.8 Acoustic shock . 99
7.5.1.8.1 Continuous signal . 99
7.5.1.8.2 Peak signal . 99
7.5.1.9 PP Delay . 99
7.5.1.10 PP ambient noise rejection . 101
7.5.2 Additional requirements for PP type 1b ("improved GAP" handset) . 101
7.5.2.0 General . 101
7.5.2.1 Terminal coupling loss . 101
7.5.2.1.1 Weighted Terminal Coupling Loss (TCLw) . 101
7.5.2.2 Attenuation Range in Sending Direction during Double Talk A . 102
H,S,dt
7.5.2.3 Attenuation Range in Receiving Direction during Double Talk A . 103
H,R,dt
7.5.2.4 Activation in Sending Direction . 104
7.5.2.5 Activation in Receiving Direction . 105
7.5.3 Transmission characteristics for PP types 1c and 1d (HATS tested, narrowband telephony handsets) . 106
7.5.3.1 Frequency responses . 106
7.5.3.1.1 Sending .
...
Frequently Asked Questions
ETSI EN 300 176-2 V2.3.1 (2019-12) is a standard published by the European Telecommunications Standards Institute (ETSI). Its full title is "Digital Enhanced Cordless Telecommunications (DECT); Test specification; Part 2: Audio and speech". This standard covers: REN/DECT-00343
REN/DECT-00343
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