SIST TBR 010 E3:2004

SLOVENSKI STANDARD
01-oktober-2004
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Digital Enhanced Cordless Telecommunications (DECT); General Terminal Attachment
Requirements; Telephony Applications
Ta slovenski standard je istoveten z: TBR 010 Edition 3
ICS:
33.070.30 'LJLWDOQHL]EROMãDQH Digital Enhanced Cordless
EUH]YUYLþQHWHOHNRPXQLNDFLMH Telecommunications (DECT)
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

TECHNICAL TBR 10
BASIS for July 1999
REGULATION Third Edition
Source: DECT Reference: RTBR/DECT-000134
ICS: 33.020
Key words: DECT, radio, testing, regulation
Digital Enhanced Cordless Telecommunications (DECT);
General terminal attachment requirements;
Telephony applications
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
Internet: secretariat@etsi.fr - http://www.etsi.org
Tel.: +33 4 92 94 42 00 - Fax: +33 4 93 65 47 16
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 1999. All rights reserved.

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TBR 10: July 1999
Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Standards Making Support Dept." at the address shown on the title page.

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TBR 10: July 1999
Contents
Foreword . 7
1 Scope. 9
2 Normative references . 9
3 Definitions and abbreviations. 11
3.1 Definitions. 11
3.2 Abbreviations. 12
4 Interpretation of the measurement results. 13
5 General test requirements . 14
5.1 Test philosophy . 14
5.1.1 Equipment supporting an ETSI approved profile . 14
5.1.2 Equipment not supporting an ETSI approved profile . 15
5.1.3 Applicant's declaration . 15
5.2 Low noise room . 16
5.3 Lower Tester (LT). 16
5.3.1 Description . 16
5.3.2 Connections between the EUT and the LT. 16
5.3.3 Functions and abilities . 16
5.3.4 Measurement uncertainty . 16
6 General testing conditions . 16
6.1 Environment for tests .16
6.2 Power supply limitations . 17
6.3 Power source. 17
7 Speech and telephony tests. 17
7.1 Test configurations . 17
7.1.1 General . 17
7.1.2 Testing a DECT system. 17
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. 20
7.2 Digital signal level. 20
7.3 General conditions of test. 21
7.4 Ideal codec . 21
7.5 Electro-acoustical equipment . 22
7.6 Speech coding scheme . 22
7.6.1 Requirement for speech coding algorithm. 22
7.6.2 Applicant's declaration on speech coding algorithm . 22
7.6.3 Requirement for the TAP in the FP. 22
7.6.4 Applicant's declaration on the TAP in the FP. 22
7.7 PP sending frequency response. 22
7.7.1 Requirement . 22
7.7.2 Method of measurement. 23
7.8 PP receiving frequency response. 23
7.8.1 Requirement . 23
7.8.2 Method of measurement. 24
7.9 PP loudness rating . 25
7.9.1 Requirement . 25
7.9.2 Method of measurement. 25
7.9.2.1 SLR . 25
H
7.9.2.2 RLR . 25
H
7.10 User controlled volume control in the PP . 25

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TBR 10: July 1999
7.10.1 Requirement.25
7.10.2 Method of measurement .26
7.10.2.1 SLR .26
H
7.10.2.2 RLR .26
H
7.11 PP talker sidetone masking rating .26
7.11.1 Requirement.26
7.11.2 Method of measurement .26
7.12 Listener SideTone (LST).26
7.12.1 LSTR requirement.26
7.12.2 Protocol requirement for EUTs with declared noise rejection capability .26
7.12.3 Method of measurement for LSTR.27
7.12.4 Method of measurement for the protocol requirement for EUTs with
declared noise rejection capability applying to be approved separately.27
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 .28
7.13.1 TCLw requirement.28
7.13.2 Protocol requirement.28
7.13.3 Method of measurement for TCLw for a PP being approved separately .28
7.13.4 Method of measurement for TCLw for a PP being approved as part of a
DECT system .29
7.13.5 Method of measurement for the protocol requirement for EUTs applying
to be approved separately.29
7.13.6 Applicant's declaration for the protocol requirement for EUTs applying to
be approved as a DECT system .29
7.14 FP echo control functions with a 4-wire interface .29
7.14.1 Static requirements .29
7.14.2 Dynamic requirements .29
7.14.2.1 Minimum TCLw.29
7.14.2.2 Full TCLw.30
7.14.3 Artificial echo loss of a FP with a 4-wire interface.30
7.14.3.1 Requirement for artificial echo loss .30
7.14.3.2 Requirement for the ability to disable the artificial echo
loss .30
7.14.3.3 Method of measurement of artificial echo loss.30
7.14.3.4 Method of measurement for ability to disable artificial
echo loss.31
7.14.3.4.1 EUTs being approved as separate
items .31
7.14.3.4.2 EUTs being approved as a DECT
system with a PP having full TCLw.31
7.14.4 Echo control device of a FP with a 4-wire interface .31
7.14.4.1 Requirement for the echo control device.31
7.14.4.2 Requirement for the ability to disable the echo control
device .31
7.14.4.3 Method of measurement for the echo control device .31
7.14.4.4 Method of measurement for the ability to disable the echo
control function .32
7.14.4.4.1 EUTs being approved as separate
items .32
7.14.4.4.2 EUTs being approved as a DECT
system with a PP having full TCLw.32
7.15 Stability loss - fixed geometry .32
7.15.1 Requirement.32
7.15.2 Method of measurement .32
7.16 Stability loss variable geometry.32
7.16.1 Requirement.32
7.16.2 Method of measurement .33
7.17 Sending distortion .33
7.17.1 Requirement.33
7.17.2 Method of measurement .33
7.18 Receiving distortion.33
7.18.1 Requirement.33

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TBR 10: July 1999
7.18.2 Method of measurement. 33
7.19 Side tone distortion. 34
7.19.1 Requirement . 34
7.19.2 Method of measurement. 34
7.20 Out of band (sending). 34
7.20.1 Requirement . 34
7.20.2 Method of measurement. 34
7.21 Out of band (receiving). 34
7.21.1 Requirement . 34
7.21.2 Method of measurement. 35
7.22 Sending noise. 35
7.22.1 Requirement . 35
7.22.2 Method of measurement. 35
7.23 Sending noise (narrow band) . 35
7.23.1 Requirement . 35
7.23.2 Method of measurement. 35
7.24 Receiving noise . 35
7.24.1 Requirement . 35
7.24.2 Method of measurement. 35
7.25 Sampling frequency level (receiving). 36
7.25.1 Requirement . 36
7.25.2 Method of measurement. 36
7.26 Acoustic shock . 36
7.27 DECT network delay.36
7.27.1 Requirement . 36
7.27.2 Method of measurement. 36
7.28 PP delay . 37
7.28.1 Requirement . 37
7.28.2 Method of measurement. 38
7.29 FP delay. 39
7.29.1 Requirement . 39
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. 45
7.33.1.4 Volume control . 45
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 . 46
7.33.2.7 Instability. 46
7.33.2.8 Echo Return Loss. 46
8 Loudspeaking and handsfree telephony.46

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TBR 10: July 1999
Annex A (normative): TBR Requirements Table (TBR-RT).47
Annex B (informative): Description of the CSS .49
B.1 General.49
B.2 Test signal.49
B.3 Measurement .50
B.4 Calculation.51
Annex C (normative): Description of the cross-correlation method.53
C.1 Test signal.53
C.2 Calculation.53
Annex D (informative): Acoustic shock requirements .54
D.1 Continuous signal.54
D.2 Peak signal.54
Annex E (informative): Bibliography.55
History.56

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TBR 10: July 1999
Foreword
This Technical Basis for Regulation (TBR) has been produced by the Digital Enhanced Cordless
Telecommunications (DECT) Project of the European Telecommunications Standards Institute (ETSI).
The present document has been produced by ETSI in response to a mandate from the European
Commission issued under Council Directive 83/189/EEC (replaced by 98/34/EC) laying down a procedure
for the provision of information in the field of technical standards and regulations.
The present document is intended to become a Harmonized Standard, the reference of which will be
published in the Official Journal of the European Communities referencing the Council Directive 98/13/EC
[32] on the approximation of the laws of the Member States concerning telecommunications terminal
equipment, including the mutual recognition of their conformity ("the TTE Directive").
Technical specifications relevant to the TTE Directive are given in annex A.
Transposition dates
Date of adoption of this TBR: 25 June 1999
Date of latest announcement of this TBR (doa): 30 September 1999
Date of endorsement of this TBR (dop/e): 31 March 2000
Date of withdrawal of any conflicting National Standard (dow): 31 March 2000

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TBR 10: July 1999
1 Scope
The present document specifies the technical characteristics particular to telephony applications provided
by terminal equipment which is capable of connection to a public telecommunications network and which
uses Digital Enhanced Cordless Telecommunications (DECT). The cordless transmissions for such
terminal equipment operate within the frequency band 1 880 MHz - 1 900 MHz.
The objective of the present document is to ensure interworking of terminal equipment via the public
network.
The requirements in the present document apply in addition to the attachment requirements for the
appropriate public network and the TBR for DECT general attachment requirements.
The present document is applicable to simple telephony terminals as well as to the telephony function of
multi-function or multi-service terminals.
The present document includes the speech quality and transmission requirements for a 3,1 kHz telephony
teleservice.
For each requirement in the present document, a test is given, including measurement methods. The
terminal equipment may be stimulated to perform the tests by additional equipment if necessary.
The present document is not applicable to terminal equipment specially designed for the disabled (e.g.
with amplification of received speech as an aid for the hard-of-hearing).
DECT comprises two equipment elements, referred to as a Fixed Part (FP) and a Portable Part (PP). The
present document is structured to allow type approval of either a) the FP and PP together, or b) the FP
and PP as separate items. Where the DECT FP is connected to a PSTN, and there are any peculiarities in
the requirements for voice telephony, these shall be accommodated within the FP.
2 Normative references
The present document incorporates by dated or undated reference, provisions from other publications.
These normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications
apply to the present document only when incorporated in it by amendment or revision. For undated
references the latest edition of the publication referred to applies.
[1] EN 300 175-1: "Digital Enhanced Cordless Telecommunications (DECT);
Common Interface (CI); Part 1: Overview".
[2] EN 300 175-2: "Digital Enhanced Cordless Telecommunications (DECT);
Common Interface (CI); Part 2: Physical layer (PHL)".
[3] EN 300 175-3: "Digital Enhanced Cordless Telecommunications (DECT);
Common Interface (CI); Part 3: Medium Access Control (MAC) layer".
[4] EN 300 175-4: "Digital Enhanced Cordless Telecommunications (DECT);
Common Interface (CI); Part 4: Data Link Control (DLC) layer".
[5] EN 300 175-5: "Digital Enhanced Cordless Telecommunications (DECT);
Common Interface (CI); Part 5: Network (NWK) layer".
[6] EN 300 175-6: "Digital Enhanced Cordless Telecommunications (DECT);
Common Interface (CI); Part 6: Identities and addressing".
[7] EN 300 175-7: "Digital Enhanced Cordless Telecommunications (DECT);
Common Interface (CI); Part 7: Security features".
[8] EN 300 175-8: "Digital Enhanced Cordless Telecommunications (DECT);
Common Interface (CI); Part 8: Speech coding and transmission".

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TBR 10: July 1999
[9] ETS 300 111: "Integrated Services Digital Network (ISDN); Telephony 3,1 kHz
teleservice; Service description".
[10] I-ETS 300 245-3: "Integrated Services Digital Network (ISDN); Technical
characteristics of telephony terminals; Part 3: Pulse Code Modulation (PCM)
A-law, loudspeaking and handsfree telephony".
[11] TBR 008 (1998): "Integrated Services Digital Network (ISDN); Telephony
3,1 kHz teleservice; Attachment requirements for handset terminals".
[12] ITU-T Recommendation G.101 (1996): "The transmission plan".
[13] ITU-T Recommendation G.111 (1993): "Loudness ratings (LRs) in an
international connection".
[14] ITU-T Recommendation G.122 (1993): "Influence of national systems on
stability and talker echo in international connections".
[15] CCITT Recommendation G.223 (1988): "Assumptions for the calculation of
noise on hypothetical reference circuits for telephony".
[16] CCITT Recommendation G.711 (1988): "Pulse code modulation (PCM) of voice
frequencies".
[17] ITU-T Recommendation G.712 (1996): "Transmission performance character-
istics of pulse code modulation channels".
[18] ITU-T Recommendation G.726 (1990): "40, 32, 24, 16 kbit/s adaptive differential
pulse code modulation (ADPCM)".
[19] CCITT Recommendation O.132 (1988): "Quantizing distortion measuring
equipment using a sinusoidal test signal".
[20] ITU-T Recommendation O.133 (1993): "Equipment for measuring the
performance of PCM encoders and decoders".
[21] ITU-T Recommendation P.50 (1993): "Artificial voices".
[22] ITU-T Recommendation P.51 (1996): "Artificial mouth".
[23] ITU-T Recommendation P.57 (1996): "Artificial ears".
[24] ITU-T Recommendation P.64 (1997): "Determination of sensitivity/frequency
characteristics of local telephone systems".
[25] ITU-T Recommendation P.79 (1993): "Calculation of loudness ratings for
telephone sets".
[26] 73/23/EEC: "Council Directive of 19 February 1973 on the harmonization of the
laws of the Member States relating to electrical equipment designed for use
within certain voltage limits" (Low Voltage Directive).
[27] ISO 3 (1973): "Preferred numbers - Series of preferred numbers".
[28] ISO 9614: "Acoustics - Determination of sound power levels of noise sources
using sound intensity".
[29] TBR 038: "Public Switched Telephone Network (PSTN); Attachment
requirements for a terminal equipment incorporating an analogue handset
function capable of supporting the justified case service when connected to the
analogue interface of the PSTN in Europe".

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TBR 10: July 1999
[30] ETS 300 700: "Digital Enhanced Cordless Telecommunications (DECT);
Wireless Relay Station (WRS)".
[31] TBR 006: "Digital Enhanced Cordless Telecommunications (DECT); General
terminal attachment requirements".
[32] 98/13/EC: "Council Directive of 12 February 1998 on the approximation of the
laws of the Member States concerning telecommunications terminal equipment
and satellite earth station equipment, including the mutual recognition of their
conformity" (Terminal Directive).
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following definitions apply:
Acoustic Reference Level (ARL): The acoustic level that corresponds to a power level of -10 dBm0 at
the TAP.
conducted measurements: Measurements which are made using a direct connection to the Equipment
Under Test (EUT).
dBPa: Sound pressure level relative to 1 Pa (no weighting).
duplex bearer: Use of two simplex bearers operating in opposite directions on two physical channels.
These pairs of channels always use the same radio Frequency (RF) carrier and always use evenly spaced
slots (i.e. separated by 0,5 Time Division Multiple Access (TDMA) frame).
Equipment Under Test (EUT): Equipment submitted to the test laboratory for type examination.
fixed geometry PP: PP in which the electro-acoustic transducers and their associated acoustic
components are held in fixed relative positions and/or orientations during all on-line conditions of the PP.
Fixed Part (DECT Fixed Part) (FP): Physical grouping that contains all of the elements in the DECT
network between the local network and the DECT air interface.
NOTE 1: A DECT fixed part contains the logical elements of at least one fixed radio termination,
plus additional implementation specific elements.
Fixed Radio Termination (FT): Logical group of functions that contains all of the DECT processes and
procedures on the fixed side of the DECT air interface.
NOTE 2: A fixed radio termination only includes elements that are defined in EN 300 175 parts 1
to 8 [1] to [8]. This includes radio transmission elements (layer 1) together with a
selection of layer 2 and layer 3 elements.
Full Slot (SLOT): One 24th of a TDMA frame which is used to support one physical channel.
handset echo: Echo, perceptible by the far-end user, resulting from the coupling between the receive and
send directions of the handset, mostly due to acoustic coupling between transducers. It is particularly
cumbersome in communications including a satellite and an echo canceller, as the DECT handset echo
may be out of range of the echo canceller.
inter-operability: Capability of fixed parts and portable parts, that enable a portable part to obtain access
to teleservices in more than one location area and/or from more than one operator (more than one service
provider).
Local Echo Loss (LLe): Sum of the reflections measured at the digital interface of the RePP. It is
calculated according to ITU-T Recommendations G.122 [14], annex B4, Trapezoidal rule.

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TBR 10: July 1999
Lower Tester (LT): Logical grouping that contains the test equipment, a functionally equivalent DECT PT,
a functionally equivalent DECT FT and a test controller.
network echo: Echo, perceptible by the DECT user, resulting from reflections in the network. It is mostly
due to hybrid impairments at both ends of the communication. The protection consists of an additional
echo loss located in the receive path of the DECT system.
Portable Handset (PHS): Single physical grouping that contains all of the portable elements that are
needed to provide a teleservice to the user.
NOTE 3: Portable handset is a subset of all possible portable parts. This subset includes all
physical groupings that combine one portable radio termination plus at least one
portable application in a single physical box.
Portable Part (PP): Physical grouping that contains all elements between the user and the DECT air
interface. Portable Part (PP) is a generic term that may describe one or several physical pieces.
NOTE 4: A portable part is logically divided into one portable termination plus one or more
portable applications.
Portable Radio Termination (PT): Logical group of functions that contains all of the DECT processes
and procedures on the portable side of the DECT air interface.
NOTE 5: A PT only includes elements that are defined in EN 300 175 parts 1 to 8 [1] to [8]. This
includes radio transmission elements together with a selection of layer 2 and layer 3
elements.
public: Attribute indicating that the application of the so qualified term is used to provide access to a
public network for the general public.
NOTE 6: The term does not imply any legal or regulatory aspect, nor does it imply any aspects
of ownership.
Test Access Point (TAP): Test Access Point is a digital interface with a relative level of 0 dBr providing
the access to the PCM speech channels in both transmission directions.
telephony 3,1 kHz teleservice: Definition for telephony 3,1 kHz teleservice is to be found in
ETS 300 111 [9].
NOTE 7: Work is currently being undertaken by ETSI to analyse the mouth-to-ear
characteristics of voice communication. The results of this work can have
consequences for the essential requirements of the present document.
test laboratory: Body which performs testing and is designated to perform 3rd party testing.
variable geometry PP: PP that allows the position and/or orientation of its electro-acoustic transducers
and their associated acoustic components to be changed during all on-line conditions of the PP.
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ADPCM Adaptive Differential PCM
ARL Acoustic Reference Level
BER Bit Error Ratio
CI Common Interface
CLRR Circuit Loudness Rating, Receive
CLRS Circuit Loudness Rating, Send
CSS Composite Source Signal
dBm dB relative to 1 mW
dBm0 The absolute power level in decibels referred to a point of zero relative level
dBr The relative power level in decibels

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TBR 10: July 1999
DLC Data Link Control
ERP Ear Reference Point
EUT Equipment Under Test
FFT Fast Fourier Transformation
FP Fixed Part
FT Fixed radio Termination
GAP Generic Access Profile
ISDN Integrated Services Digital Network
LL Local Echo loss
e
L Telephone Sidetone Path Loss
meST
LNR Low Noise Room
LR Loudness Rating
LRGP Loudness Rating Guard-ring Position
LST Listener Sidetone
LSTR Listener Sidetone Rating
LT Lower Tester
MAC Medium Access Control
MRP Mouth Reference Point
NWK NetWorK
PABX Private Automatic Branch Exchange
PCM Pulse Code Modulation
PHL Physical Layer
PHS Portable HandSet
PP Portable Part
PSTN Public Switched Telephone Network
PT Portable radio Termination
ReFP Reference Fixed Part (for speech testing)
RePP Reference Portable Part (for speech testing)
RF Radio Frequency
RLR Receive Loudness Rating
RLR Receiving Loudness Rating of the Handset
H
rms root mean square
SL Linear input Signal, see CCITT Recommendation G.726 [18]
SLR Sending Loudness Rating
SLR Sending Loudness Rating of the Handset
H
SR Reconstructed Signal, see CCITT Recommendation G.726 [18]
Ssi(diff) The difference of the send sensitivities between diffuse and direct sound
Ssi(direct) The sending sensitivities for the direct sound
STMR SideTone Masking Rating
TAP Test Access Point
TCL Terminal Coupling Loss
TCLw weighted Terminal Coupling Loss
TDMA Time Division Multiple Access
TELR Talker Echo Loudness Rating
WRS Wireless Relay Station
4 Interpretation of the measurement results
The interpretation of the results recorded in a test report for the measurements described in the present
document shall be as follows:
a) the measured value related to the corresponding limit shall be used to decide whether an
equipment meets the minimum requirements of the standard;
b) the actual measurement uncertainty of the test laboratory carrying out the measurement, for each
particular measurement, shall be included in the test report;
c) the values of the actual measurement uncertainty shall be, for each measurement, equal to or lower
than the values in subclause 5.3.4.

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TBR 10: July 1999
5 General test requirements
Those functions and procedures which are optional, as indicated directly or indirectly by "if provided", shall
be subject to a conformance test if they are implemented. Whether an optional function/procedure has
been implemented shall be indicated by the Apparatus Suppliers declaration.
Wireless Relay Stations, WRS, [30], approved according to the TBR for DECT general attachment
requirements [31], also belong to telephony applications. Testing according to the present document is
however not applicable to a WRS.
NOTE: A WRS conforms to a defined frame multiplexing scheme [30], which provides a
transparent digital bit pipe for the user data, and which automatically provides an
acceptable upper bound of the incremental delay introduced by a WRS. No more than
one hop is allowed. On national basis, multi-hop architectures may be allowed with the
agreement of the national authority. See EN 300 175-8 [8] subclause 8.4.1 for modified
echo control requirements for multi-hop architectures.
5.1 Test philosophy
5.1.1 Equipment supporting an ETSI approved profile
Equipment falling into this category is defined in EN 300 175-1 [1].
In this case, a test equipment capable of emulating a PT or FT that conforms to EN 300 175 parts 1 to
8 [1] to [8] operating an ETSI approved profile corresponding to that supported by the EUT is required.
Consequently, each test set-up consists of the test equipment being connected to the EUT, either by a
radio link or via an antenna connector, and a call being established. Figures 1 and 2 show the possible
test configurations.
Upper tester Lower tester
PT
em ulating
EUT
a FT
Radio link
OR
cable connection
Upper tester Lower tester
em ulating
PT
EUT a FT
Figure 1: The EUT is a PT
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TBR 10: July 1999
Upper tester Lower tester
FT
em ulating
EUT
a PT
Radio link
OR
cable connection
Upper tester Lower tester
em ulating
FT
EUT a PT
Figure 2: The EUT is an FT
Figures 1 and 2 also show that, if available, the EUT can sometimes be connected to the LT by an
antenna connector. This is normally preferred in order to minimize the measurement uncertainties.
The Lower Tester (LT) will consist of the general test equipment with the functionality as described in
subclause 5.3. Also it will include an RF interface which can emulate the DECT Common Interface.
5.1.2 Equipment not supporting an ETSI approved profile
Equipment falling into this category is defined in EN 300 175-1 [1].
If an LT is available that can establish a speech connection with the EUT and the EUT supports, where
required, the <> information element as described in EN 300 175-5 [5],
subclause 7.7.41, then approval of an FP and a PP as a separate item is allowed, and the test philosophy
described in subclause 5.1.1 shall be applicable.
If an LT is not available that can establish a speech connection with the EUT or the EUT does not support,
where required, the <> information element as described in EN 300 175-5 [5],
subclause 7.7.41, then the FP and PP shall be approved as a pair. The applicant shall describe to the test
authority how a call is established, maintained and released.
However, when a PT or FT is to be tested as a separate item, the applicant shall provide the test authority
with a means for establishing, maintaining and releasing a speech connection in order to test the EUT.
5.1.3 Applicant's declaration
Where parameters, capabilities, etc. are subject to applicant's declaration and not a specific test, it will be
the applicant's responsibility to:
a) supply a Declaration of Implementation, in which the Applicant explicitly affirms the implementation
in the equipment of certain parameters and capabilities;
b) be prepared to submit upon request supporting design information, including circuit designs and
software source code, demonstrating the implementation of said capabilities;
c) be prepared to supply upon request such test results as are practicable, including the test methods,
which support the declaration.
NOTE: This applies also where adaptive volume control methods are provided for noise
rejection and/or echo control capabilities which e.g. have to be switched inactive for
some of the tests described below and/or where new test methods have to be
declared.
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TBR 10: July 1999
5.2 Low noise room
Low noise refers to audio sound and not RF radiation.
The test space shall be practically free-field (anechoic) down to a lowest frequency of 275 Hz, and be
such that the handset lies totally within the free field volume. This shall be met if deviations from the ideal
free field conditions are less than ±1 dB. The ambient noise level shall be less than -64 dBPa(A).
Measurements made in the low noise room shall satisfy the measurement uncertainty requirements
described in subclause 5.3.4.
5.3 Lower Tester (LT)
5.3.1 Description
The LT is a logical grouping that contains a ReFP, RePP, the measurement equipment and the controller
of the DECT testing system. The LT has the job of establishing the speech path, performing calculations
(e.g. signal processing) and interacting with the EUT for the various tests. The LT shall implement the
mandatory parts of the DECT specification (see part A of the present document) and any ETSI approved
profiles.
When testing EUTs that do not support an ETSI approved profile, the LT is not required to have
implemented an ETSI approved profile. See s
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