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SIST EN 300 176-2 V1.4.1:2003

(Main)

Digital Enhanced Cordless Telecommunications (DECT); Approval test specification; Part 2: Speech

Digital Enhanced Cordless Telecommunications (DECT); Approval test specification; Part 2: Speech

Maintenance update. Supporting ETSI Member Organisations: Siemens Alcatel, Ascom, Philips.

Digitalne izboljšane brezvrvične telekomunikacije (DECT) – Specifikacija odobritvenega preskusa – 2. del: Govor

General Information

Status
Published
Publication Date
30-Nov-2003
ICS
33.070.30 - Digital Enhanced Cordless Telecommunications (DECT)
Technical Committee
SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Dec-2003
Due Date
01-Dec-2003
Completion Date
01-Dec-2003
Ref Project
ETSI EN 300 176-2 V1.4.1 (2001-02) - Digital Enhanced Cordless Telecommunications (DECT); Approval test specification; Part 2: Speech

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SLOVENSKI STANDARD
SIST EN 300 176-2 V1.4.1:2003
01-december-2003
'LJLWDOQHL]EROMãDQHEUH]YUYLþQHWHOHNRPXQLNDFLMH '(&7 ±6SHFLILNDFLMD
RGREULWYHQHJDSUHVNXVD±GHO*RYRU
Digital Enhanced Cordless Telecommunications (DECT); Approval test specification;
Part 2: Speech
Ta slovenski standard je istoveten z: EN 300 176-2 Version 1.4.1
ICS:
33.070.30 'LJLWDOQHL]EROMãDQH Digital Enhanced Cordless
EUH]YUYLþQHWHOHNRPXQLNDFLMH Telecommunications (DECT)
'(&7
SIST EN 300 176-2 V1.4.1:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 300 176-2 V1.4.1:2003

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SIST EN 300 176-2 V1.4.1:2003
ETSI EN 300 176-2 V1.4.1 (2001-02)
European Standard (Telecommunications series)
Digital Enhanced Cordless Telecommunications (DECT);
Approval test specification;
Part 2: Speech

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SIST EN 300 176-2 V1.4.1:2003
2 ETSI EN 300 176-2 V1.4.1 (2001-02)
Reference
REN/DECT-A0155-2
Keywords
DECT, radio, regulation, speech, testing, voice
ETSI
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Important notice
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
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 http://www.etsi.org/tb/status/
If you find errors in the present document, send your comment to:
editor@etsi.fr
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 2001.
All rights reserved.
ETSI

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SIST EN 300 176-2 V1.4.1:2003
3 ETSI EN 300 176-2 V1.4.1 (2001-02)
Contents
Intellectual Property Rights .7
Foreword.7
1 Scope.8
2 References.9
3 Definitions and abbreviations.10
3.1 Definitions . 10
3.2 Abbreviations. 12
4 Interpretation of the measurement results .13
5 General test requirements.13
5.1 Test philosophy. 13
5.1.1 Equipment supporting an ETSI approved profile. 13
5.1.2 Equipment not supporting an ETSI approved profile. 14
5.1.3 Applicant's declaration . 14
5.2 Low noise room . 15
5.3 Lower Tester (LT). 15
5.3.1 Description . 15
5.3.2 Connections between the EUT and the LT. 15
5.3.3 Functions and abilities. 15
5.3.4 Measurement uncertainty . 15
6 General testing conditions.16
6.1 Environment for tests . 16
6.2 Power supply limitations . 16
6.3 Power source. 16
7 Speech and telephony tests.16
7.1 Test configurations. 16
7.1.1 General. 16
7.1.2 Testing a DECT system. 16
7.1.3 Testing a separate PP or FP . 17
7.1.4 Reference FP (ReFP) and Reference PP (RePP). 18
7.1.5 Applicability of tests . 19
7.2 Digital signal level . 19
7.3 General conditions of test . 20
7.4 Ideal codec. 20
7.5 Electro-acoustical equipment. 20
7.6 Speech coding scheme. 21
7.6.1 Requirement for speech coding algorithm. 21
7.6.2 Applicant's declaration on speech coding algorithm . 21
7.6.3 Requirement for the TAP in the FP. 21
7.6.4 Applicant's declaration on the TAP in the FP. 21
7.7 PP sending frequency response. 21
7.7.1 Requirement . 21
7.7.2 Method of measurement. 22
7.8 PP receiving frequency response. 22
7.8.1 Requirement . 23
7.8.2 Method of measurement. 23
7.9 PP loudness rating. 24
7.9.1 Requirement . 24
7.9.2 Method of measurement. 24
7.9.2.1 SLRH. 24
7.9.2.2 RLRH . 24
7.10 User controlled volume control in the PP . 24
7.10.1 Requirement . 24
ETSI

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SIST EN 300 176-2 V1.4.1:2003
4 ETSI EN 300 176-2 V1.4.1 (2001-02)
7.10.2 Method of measurement. 25
7.10.2.1 SLRH. 25
7.10.2.2 RLRH . 25
7.11 PP talker sidetone masking rating . 25
7.11.1 Requirement . 25
7.11.2 Method of measurement. 25
7.12 Listener SideTone (LST) . 25
7.12.1 LSTR requirement . 25
7.12.2 Protocol requirement for EUTs with declared noise rejection capability . 25
7.12.3 Method of measurement for LSTR . 26
7.12.4 Method of measurement for the protocol requirement for EUTs with declared noise rejection
capability applying to be approved separately. 26
7.12.5 Applicant's declaration for the protocol requirement for EUTs applying to be approved as a DECT
system . 27
7.13 Terminal Coupling Loss (TCLw) of a PP. 27
7.13.1 TCLw requirement. 27
7.13.2 Protocol requirement. 27
7.13.3 Method of measurement for TCLw for a PP being approved separately. 27
7.13.4 Method of measurement for TCLw for a PP being approved as part of a DECT system . 28
7.13.5 Method of measurement for the protocol requirement for EUTs applying to be approved separately. 28
7.13.6 Applicant's declaration for the protocol requirement for EUTs applying to be approved as a DECT
system . 28
7.14 FP echo control functions with a 4-wire interface. 28
7.14.1 Static requirements. 28
7.14.2 Dynamic requirements . 29
7.14.2.1 Minimum TCLw. 29
7.14.2.2 Full TCLw. 29
7.14.3 Artificial echo loss of a FP with a 4-wire interface. 29
7.14.3.1 Requirement for artificial echo loss. 29
7.14.3.2 Requirement for the ability to disable the artificial echo loss. 29
7.14.3.3 Method of measurement of artificial echo loss.29
7.14.3.4 Method of measurement for ability to disable artificial echo loss . 30
7.14.3.4.1 EUTs being approved as separate items . 30
7.14.3.4.2 EUTs being approved as a DECT system with a PP having full TCLw . 30
7.14.4 Echo control device of a FP with a 4-wire interface . 30
7.14.4.1 Requirement for the echo control device . 30
7.14.4.2 Requirement for the ability to disable the echo control device. 30
7.14.4.3 Method of measurement for the echo control device. 30
7.14.4.4 Method of measurement for the ability to disable the echo control function . 31
7.14.4.4.1 EUTs being approved as separate items . 31
7.14.4.4.2 EUTs being approved as a DECT system with a PP having full TCLw . 31
7.15 Stability loss - fixed geometry . 31
7.15.1 Requirement . 31
7.15.2 Method of measurement. 31
7.16 Stability loss variable geometry . 31
7.16.1 Requirement . 31
7.16.2 Method of measurement. 32
7.17 Sending distortion . 32
7.17.1 Requirement . 32
7.17.2 Method of measurement. 32
7.18 Receiving distortion . 32
7.18.1 Requirement . 32
7.18.2 Method of measurement. 32
7.19 Side tone distortion. 33
7.19.1 Requirement . 33
7.19.2 Method of measurement. 33
7.20 Out of band (sending). 33
7.20.1 Requirement . 33
7.20.2 Method of measurement. 33
7.21 Out of band (receiving). 33
7.21.1 Requirement . 33
7.21.2 Method of measurement. 34
ETSI

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SIST EN 300 176-2 V1.4.1:2003
5 ETSI EN 300 176-2 V1.4.1 (2001-02)
7.22 Sending noise. 34
7.22.1 Requirement . 34
7.22.2 Method of measurement. 34
7.23 Sending noise (narrow band) . 34
7.23.1 Requirement . 34
7.23.2 Method of measurement. 34
7.24 Receiving noise. 34
7.24.1 Requirement . 34
7.24.2 Method of measurement. 35
7.25 Sampling frequency level (receiving). 35
7.25.1 Requirement . 35
7.25.2 Method of measurement. 35
7.26 Acoustic shock . 35
7.27 DECT network delay. 35
7.27.1 Requirement . 35
7.27.2 Method of measurement. 36
7.28 PP delay. 37
7.28.1 Requirement . 37
7.28.2 Method of measurement. 37
7.29 FP delay. 38
7.29.1 Requirement . 38
7.29.2 Method of measurement. 39
7.30 Echo control at the network side. 40
7.30.1 Requirement . 40
7.30.2 Method of measurement. 40
7.30.2.1 4-wire interface . 40
7.30.2.2 Analogue 2-wire interface. 41
7.30.2.2.1 Requirement 1. 41
7.30.2.2.2 Requirement 2. 42
7.31 Variation of gain with input level-sending. 43
7.31.1 Requirement . 43
7.31.2 Method of measurement. 43
7.32 Variation of gain with input level-receiving . 43
7.32.1 Requirement . 43
7.32.2 Method of measurement. 44
7.33 Additional requirements for DECT systems provided with a 2-wire PSTN interface . 44
7.33.1 General. 44
7.33.1.1 Polarity independence. 44
7.33.1.2 Feed Conditions. 44
7.33.1.3 Power supply. 44
7.33.1.4 Volume control. 44
7.33.2 Speech performance characteristics . 45
7.33.2.1 Sensitivity/frequency response. 45
7.33.2.2 Sending and Receiving Loudness Ratings (SLR and RLR) . 45
7.33.2.3 Sidetone . 45
7.33.2.4 Distortion . 45
7.33.2.5 Linearity (variation of gain with input level) . 45
7.33.2.6 Noise. 45
7.33.2.7 Instability . 45
7.33.2.8 Echo Return Loss . 45
ETSI

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SIST EN 300 176-2 V1.4.1:2003
6 ETSI EN 300 176-2 V1.4.1 (2001-02)
8 Loudspeaking and handsfree telephony.46
Annex A (informative): Justification for Requirements .47
Annex B (informative): Description of the CSS.50
B.1 General.50
B.2 Test signal .50
B.3 Measurement .51
B.4 Calculation .52
Annex C (normative): Description of the cross-correlation method .54
C.1 Test signal .54
C.2 Calculation .54
Annex D (informative): Acoustic shock requirements.55
D.1 Continuous signal .55
D.2 Peak signal .55
Annex E (informative): Bibliography.56
History .57
ETSI

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SIST EN 300 176-2 V1.4.1:2003
7 ETSI EN 300 176-2 V1.4.1 (2001-02)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to
...

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The present document gives an introduction and overview of the complete Digital Enhanced Cordless Telecommunications (DECT) Common Interface (CI). This part of the DECT CI specifies the speech coding and transmission requirements. In order to ensure satisfactory interworking of different portable and fixed units, it is necessary to specify the transmission performance of the analogue information over the digital link. This requires not only use of a common speech algorithm, but also standardization of frequency responses, reference speech levels (or loudness) at the air interface and various other parameters. The present document applies to DECT equipment which includes all the necessary functions to provide real-time two-way speech conversation. A 3,1 kHz telephony teleservice conveyed over a DECT link (including Fixed Part (FP) and Portable Part (PP)) which is capable of being connected (directly or indirectly) to the public network access point should comply with the requirements in the present document. Tethered fixed point local loop applications are not required to comply with the requirements of the present document. The speech performance characteristics defined in the present document typically conform to TBR 008 (see bibliography), which specifies the overall performance between the handset acoustic interface and a 64 kbit/s A-law Pulse Code Modulated (PCM) digital network interface. The deviations from TBR 008 are mainly due to the consequences of non-PCM coding and transmission delay.
The additional features described in clause 8 are those which are not included in TBR 008, but which are likely to occur in a DECT system: analogue interface, loudspeaking and hand-free facilities, tandeming with a mobile radio network. Headsets are not covered by the present specifications. For the DECT systems which connect to the Public Switched Telephone Network (PSTN) via an analogue interface, the additional requirements, which are implemented in the FP, have as much as possible been aligned with TBR 038 (see bibliography).
A summary of the control and the use of the DECT echo control functions, to guide on need for options to manufacturers and installers, is found in annex A. Information concerning test methods can be found in EN 300 176 [3]. The test methods take into account that DECT is a digital system.

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