ETSI TBR 008 ed.2 (1998-10)

Integrated Services Digital Network (ISDN); Telephony 3,1 kHz teleservice; Attachment requirements for handset terminals

RTBR/DTA-004044

Digitalno omrežje z integriranimi storitvami (ISDN) - Daljinska storitev telefonije 3,1 kHz - Priključitvene zahteve za ročne terminale

General Information

• Status: Published
• Publication Date: 14-Oct-1998
• Technical Committee: DTA - Digital Terminals & Access
• Current Stage: 12 - Completion
• Due Date: 07-Oct-1998
• Completion Date: 15-Oct-1998
• Mandate: T-237H
• Ref Project: SIST TBR 008 E2:2004 - Integrated Services Digital Network (ISDN); Telephony 3,1 kHz teleservice; Attachment requirements for handset terminals

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2004
'LJLWDOQRRPUHåMH]LQWHJULUDQLPLVWRULWYDPL,6'1'DOMLQVNDVWRULWHYWHOHIRQLMH
N+]3ULNOMXþLWYHQH]DKWHYH]DURþQHWHUPLQDOH
Integrated Services Digital Network (ISDN); Telephony 3,1 kHz teleservice; Attachment
requirements for handset terminals
Ta slovenski standard je istoveten z: TBR 008 Edition 2
ICS:
33.080 Digitalno omrežje z Integrated Services Digital
integriranimi storitvami Network (ISDN)
(ISDN)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

TECHNICAL TBR 8
BASIS for October 1998
REGULATION Second Edition
Source: DTA Reference: RTBR/DTA-004044
ICS: 33.020
Key words: ISDN, telephony, 3,1 kHz, teleservice, terminal
Integrated Services Digital Network (ISDN);
Telephony 3,1 kHz teleservice;
Attachment requirements for handset terminals
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: [e-mail] - http://www.etsi.org
Tel.: [phone] - Fax: [phone]
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 1998. All rights reserved.

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TBR 8: October 1998
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 8: October 1998
Contents
Foreword .7
1 Scope .9
2 Normative references.9
3 Definitions and abbreviations .11
3.1 Definitions .11
3.2 Abbreviations .12
4 General.12
5 Safety requirements .12
6 ElectroMagnetic Compatibility (EMC) requirements.12
7 Call control functions.13
7.1 Information element codings specific for the Telephony 3,1 kHz teleservice .13
7.1.1 Bearer Capability information element .13
7.1.2 High Layer Compatibility (HLC) information element .14
7.1.3 Low Layer Compatibility (LLC) information element.14
7.2 Outgoing calls, inclusion and coding of the compatibility elements .15
7.3 Incoming calls - compatibility checking.15
8 Transmission aspects .16
8.1 General .16
8.1.1 Encoding .16
8.1.2 Volume control .16
8.2 Speech performance characteristics (handset telephony 3,1 kHz) .17
8.2.1 Sensitivity - frequency response.17
8.2.1.1 Sending.17
8.2.1.2 Receiving.17
8.2.2 Sending and Receiving Loudness Ratings (SLR and RLR).18
8.2.2.1 Nominal values .18
8.2.2.2 Volume control.18
8.2.3 Sidetone .18
8.2.3.1 Talker sidetone .18
8.2.3.2 Listener sidetone .19
8.2.4 Terminal Coupling Loss (TCL) .19
8.2.4.1 Weighted Terminal Coupling Loss (TCLw).19
8.2.4.2 Stability loss.19
8.2.5 Distortion .19
8.2.5.1 Sending.19
8.2.5.1.1 Method 1 (Pseudo random noise
stimulus) .19
8.2.5.1.2 Method 2 (Sinusoidal test signal).20
8.2.5.2 Receiving.20
8.2.5.2.1 Method 1 (Pseudo random noise
signal) .20
8.2.5.2.2 Method 2 (Sinusoidal test signal).21
8.2.5.3 Sidetone.21
8.2.6 Variation of gain with input level.21
8.2.6.1 Sending.21
8.2.6.2 Receiving.21
8.2.7 Out-of-band signals.22
8.2.7.1 Discrimination against out-of-band input signals (sending).22

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TBR 8: October 1998
8.2.7.2 Spurious out-of-band (receiving). 22
8.2.8 Noise. 23
8.2.8.1 Sending. 23
8.2.8.2 Receiving . 23
8.2.8.3 Level of sampling frequency (receiving) . 23
8.2.9 Acoustic shock. 23
8.2.10 Delay. 23
9 Operation under restricted power conditions.24
10 Testing and approval methodology. 24
Annex A (normative): Test specification for voice transmission aspects. 25
A.1 General conditions for testing. 25
A.1.1 Environment for tests . 25
A.1.2 Test equipment interface.25
A.1.3 Test equipment requirements . 25
A.1.3.1 Electro-acoustic equipment . 25
A.1.3.2 Test equipment for digital telephone sets. 25
A.1.3.2.1 Codec approach and specification. 25
A.1.3.2.2 Direct digital processing approach. 27
A.1.4 Alternative test methods. 27
A.1.5 Accuracy of test equipment. 27
A.1.6 Bandwidth. 27
A.1.7 Powering . 27
A.2 Transmission requirements testing . 28
A.2.1 Sensitivity/frequency response. 28
A.2.1.1 Sending. 28
A.2.1.2 Receiving . 28
A.2.2 Loudness ratings. 28
A.2.2.1 Sending Loudness Rating (SLR) . 28
A.2.2.2 Receiving Loudness Rating (RLR) . 29
A.2.3 Sidetone . 29
A.2.3.1 Talker sidetone . 29
A.2.3.2 Listener sidetone . 29
A.2.3.2.1 Sound field calibration. 29
A.2.3.2.2 Measurement and calculation of LSTR. 30
A.2.3.2.3 Measurement and calculation of the value of the D-factor . 30
A.2.4 Terminal Coupling Loss . 31
A.2.4.1 Weighted Terminal Coupling Loss (TCLw). 31
A.2.4.2 Stability loss. 31
A.2.5 Distortion . 32
A.2.5.1 Sending. 32
A.2.5.1.1 Method 1 . 32
A.2.5.1.2 Method 2 . 32
A.2.5.2 Receiving . 32
A.2.5.2.1 Method 1 . 32
A.2.5.2.2 Method 2 . 32
A.2.5.3 Sidetone. 33
A.2.6 Variation of gain with input level. 33
A.2.6.1 Sending. 33
A.2.6.2 Receiving . 33
A.2.7 Out-of-band signals. 33
A.2.7.1 Discrimination against out-of-band input signal. 33
A.2.7.2 Spurious out-of-band signals. 33
A.2.8 Noise . 34
A.2.8.1 Sending. 34
A.2.8.2 Receiving . 34
A.2.8.3 Level of sampling frequency (receiving) . 34
A.2.9 Delay . 34

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TBR 8: October 1998
Annex B (normative): Abstract Test Suite (ATS) in electronic form for the call control functions .36
B.1 The TTCN Graphical form (TTCN.GR) .36
B.2 The TTCN Machine Processable form (TTCN.MP) .36
Annex C (informative): Acoustic shock requirements .37
C.1 Continuous signal.37
C.2 Peak signal.37
Annex D (normative): Description of the cross-correlation method.38
D.1 Test signal.38
D.2 Calculation.38
Annex E (normative): TBR Requirements Table (TBR-RT).39
E.1 Guidance for completion of the TBR-RT.39
E.2 Call control functions requirements TBR-RT .40
E.3 Transmission aspects requirements TBR-RT.40
Annex F (informative): Test Report Format .42
F.1 Identification .42
F.1.1 Identification of the Document .42
F.1.2 Identification of the testing laboratory .42
F.1.3 Identification of the client .42
F.1.4 Identification of the test item .42
F.1.5 Use of subcontractors.42
F.2 Test conditions .43
F.3 Test equipment .43
F.4 Test results.43
F.4.1 Call control functions.43
F.4.2 Speech transmission characteristics .43
F.4.3 Power feeding.43
F.5 Summary and conclusion.43
Annex G (normative): List of supported telecommunication services .44
G.1 Basic telecommunication services .44
G.2 Supplementary services.44
Annex H (informative): Bibliography.45
History.48

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TBR 8: October 1998
Foreword
This Technical Basis for Regulation (TBR) has been produced by the ETSI Project Digital Terminals and
Access (DTA).
The present document has been produced by ETSI in response to a mandate from the European
Commission issued under Council Directive 83/189/EEC (as amended) 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 as requested by the above
mentioned mandate, the reference of which will be published in the Official Journal of the European
Communities referencing the Council Directive relating to telecommunications terminal equipment and
satellite earth station equipment, including the mutual recognition of their conformity (Directive 98/13/EC).
A common technical regulation may be established by the European Commission in accordance with the
Directive.
Technical specifications relevant to the 98/13/EC Directive are given in the TBR-Requirements Table
(TBR-RT) in annex E.
Transposition dates
Date of adoption of this TBR 18 September 1998
Date of latest announcement of this TBR (doa): 31 January 1999
Date of latest publication of new National Standard
or endorsement of this TBR (dop/e): 30 April 1999
Date of withdrawal of any conflicting National Standard (dow): 31 October 1999

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TBR 8: October 1998
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TBR 8: October 1998
1 Scope
This Technical Basis for Regulation (TBR) specifies the technical requirements under Article 5(g) of
Directive 98/13/EC for Terminal Equipment Type 1 (TE1 see [1]) for the telephony 3,1 kHz teleservice to
be attached to the pan-European Integrated Services Digital Network (ISDN) at an interface at the
coincident S and T reference point for a basic access.
The objective of this TBR is to ensure interworking via the network.
A test is given for each requirement in this TBR including measurement methods. The terminal equipment
may be stimulated to perform tests by additional equipment if necessary.
This TBR specifies the Article 5(g) requirements for TE1 that:
a) are intended for participation in calls that use those on-demand circuit mode basic services that are
specified in clause G.1;
b) optionally use those supplementary services that are specified in clause G.2;
c) are capable of handling either incoming calls only, outgoing calls only or both incoming and
outgoing calls.
This TBR is applicable to simple 3,1 kHz telephony terminals as well as to the 3,1 kHz telephony function
of multimedia or multi-service terminals and includes all functions necessary to provide real-time 2-way
speech conversation. This TBR only applies to items of terminal equipment with an integral user-network
interface for ISDN basic access, and which have a handset. Where a function is indicated as optional, it
need not be provided, but, where such a function is provided, the terminal needs to conform to the
requirements and tests specified in this TBR.
This TBR is not applicable to:
a) terminal equipment specially designed for the disabled (e.g., with amplification of received speech
as an aid for the hard-of-hearing);
b) terminal equipment using a radio link (e.g., cordless telephones);
c) terminal equipment for hostile environments;
d) terminal equipment with a switching function which is not covered by the definition of TE1.
NOTE: Terminals that meet the requirements of this TBR will also be suitable for connection
to the S reference point for interworking via the public network.
2 Normative references
This TBR 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 this TBR only when incorporated in it by amendment or revision. For undated references the
latest edition of the publication referred to applies. Informative references can be found in annex H.
[1] CCITT Recommendation I.411 (1988): "ISDN user-network interfaces -
Reference configurations".
[2] ITU-T Recommendation P.10: "Vocabulary of terms on telephone transmission
quality and telephone sets".
[3] ITU-T Recommendation G.701 (1993): "Vocabulary of digital transmission and
multiplexing, and pulse code modulation (PCM) terms".
[4] IEC 651: "Sound level meters".

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TBR 8: October 1998
[5] TBR 3 (1995) including Amendment 1 (1998): "Integrated Services Digital
Network (ISDN); Attachment requirements for terminal equipment to connect to
an ISDN using ISDN basic access".
[6] ITU-T Recommendation G.101 (1996): "The transmission plan".
[7] ETS 300 111 (1992): "Integrated Services Digital Network (ISDN); Telephony
3,1 kHz teleservice, Service description".
[8] ITU-T Recommendation G.122 (1993): "Influence of national systems on
stability and talker echo in international connections".
[9] ETS 300 102-1 (1993): "Integrated Services Digital Network (ISDN); User-
network interface layer 3, Specifications for basic call control".
[10] CCITT Recommendation G.711 (1988): "Pulse code modulation (PCM) of voice
frequencies".
[11] CCITT Recommendation G.223 (1988): "Assumptions for the calculation of
noise on hypothetical reference circuits for telephony".
[12] ITU-T Recommendation P.51 (1996): "Artificial mouth".
[13] ITU-T Recommendation P. 57 (1996): "Artificial ears".
[14] ITU-T Recommendation O.133 (1993): "Equipment for measuring the
performance of PCM encoders and decoders".
[15] ITU-T Recommendation G.712 (1996): "Transmission performance
characteristics of pulse code modulation channels".
[16] ITU-T Recommendation P.64 (1997): "Determination of sensitivity/frequency
characteristics of local telephone systems".
[17] ISO 3 (1973): "Preferred numbers - series of preferred numbers".
[18] ITU-T Recommendation P.79 (1993): "Calculation of loudness ratings for
telephone sets".
[19] IEC 225: "Octave, half-octave and third-octave band filters intended for the
analysis of sound and vibrations".
[20] CCITT Recommendation O.131 (1988): "Quantizing distortion measuring
equipment using a pseudo-random noise test signal".
[21] CCITT Recommendation O.132 (1988): "Quantizing distortion measuring
equipment using a sinusoidal test signal".
[22] ISO/IEC 9646: "Information technology - Open Systems Interconnection -
Conformance testing methodology and framework".

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TBR 8: October 1998
3 Definitions and abbreviations
3.1 Definitions
For the purposes of this TBR, the relevant definitions as given in ITU-T Recommendation P.10 [2] and
ITU-T Recommendation G.701 [3], apply plus the following:
Acoustic Reference Level (ARL): The acoustic level which gives -10 dBm0 at the digital interface.
dB(A): Sound level relative to 20 mPa measured using the A-weighting defined in IEC 651 [4].
dBPa: Sound pressure level relative to 1 Pa (no weighting).
dBPa(A): Sound level relative to 1 Pa measured using the A-weighting defined in IEC 651 [4].
D-factor: The computed average of the difference between the sending sensitivity using an artificial
mouth and that using a diffuse room noise source.
designated terminal: The terminal which is permitted to draw power from power source 1 under
restricted power conditions as specified in TBR 3 [5].
digital interface: The interface at the coincident S and T reference point. The digital interface shall be a 0
dBr point according to ITU-T Recommendation G.101 [6].
multimedia terminal: A terminal that simultaneously supports two or more media.
multiservice terminal: A terminal that supports two or more teleservices.
pink noise: A noise signal where the power spectrum is diminishing by 3 dB/octave.
restricted power condition: The condition indicated by the reversed polarity of the phantom voltage at
the coincident S and T reference point, as defined in TBR 3 [5].
NOTE 1: For some networks restricted power condition will be the normal operating mode.
telephony 3,1 kHz teleservice: As defined in ETS 300 111 [7].
NOTE 2: Work is currently being undertaken by ETSI to analyse the mouth-to-ear
characteristics of voice communication. The results of this work could have
consequences for the essential requirements of this TBR.
Terminal Coupling Loss (TCL): The frequency dependent coupling loss between the receiving port and
the sending port of a terminal due to:
- acoustical coupling at the user interface;
- electrical coupling due to crosstalk in the handset cord or within the electrical circuits;
- seismic coupling through the mechanical parts of the terminal.
NOTE 3: The receiving port and the sending port of a digital voice terminal is a 0 dBr point.
NOTE 4: The coupling at the user interface depends on the conditions of use.
Weighted Terminal Coupling Loss (TCLW): The weighted terminal coupling loss using the weighting of
ITU-T Recommendation G.122 [8].
3,1 kHz telephony terminal: A terminal that supports the telephony 3,1 kHz teleservice as described in
ETS 300 111 [7].
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TBR 8: October 1998
3.2 Abbreviations
For the purposes of this TBR, the relevant abbreviations given in ITU-T Recommendation P.10 [2] and
ITU-T Recommendation G.701 [3], apply plus the following:
ARL Acoustic Reference Level
BC Bearer Capability
DTS Digital Test Sequence
EMC ElectroMagnetic Compatibility
ERP Ear Reference Point
HLC High Layer Compatibility
ICS Implementation Conformance Statement
ISDN Integrated Services Digital Network
IUT Implementation Under Test
LE acoustic earcap LEakage
LLC Low Layer Compatibility
LmeST SideTone path loss
LRGP Loudness Rating Guard-ring Position
LSTR Listener SideTone Rating
MFPB Multi Frequency PushButton
MRP Mouth Reference Point
STMR SideTone Masking Rating
TBR Technical Basis for Regulation
TBR-RT Technical Basis for Regulation - Requirements Table
TCL Terminal Coupling Loss
TCLw Weighted Terminal Coupling Loss
TE Terminal Equipment
RLR Receiving Loudness Ratings
SLR Sending Loudness Ratings
4 General
Each requirement in this TBR is either applicable to all Terminal Equipment (TE) within the scope of this
TBR, or only applicable to certain TE, depending on the functions implemented within the TE. Annex E
specifies the relationship between the requirements and the terminal. The supplier shall provide
information on the functions implemented in the terminal and this information shall be used to determine
which requirements apply and the manner in which the tests are to be performed. This information may
be provided in the form of a complete TBR Requirements Table (TBR-RT) proforma (a blank TBR-RT
proforma is provided in annex E).
Since the verification of the voice transmission depends on the proper operation of the call control
functions, the verification of the call control tests shall be performed before verification of the voice
transmission tests.
5 Safety requirements
There are no safety requirements under this TBR.
NOTE: Safety requirements are imposed under the Low Voltage Directive (73/23/EEC) and
articles 5 (a) and 5 (b) of Directive 98/13/EC.
6 ElectroMagnetic Compatibility (EMC) requirements
There are no EMC requirements under this TBR.
NOTE: EMC requirements are imposed under the EMC Directive (89/336/EEC). Requirements
for conducted emissions will be added to this TBR when appropriate.

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TBR 8: October 1998
7 Call control functions
At least one of the following shall be implemented:
- outgoing calls;
- incoming calls.
NOTE: The option chosen should not conflict with the option chosen for TBR 3 [5].
7.1 Information element codings specific for the Telephony 3,1 kHz teleservice
7.1.1 Bearer Capability information element
Reference: ETS 300 102-1, subclause 4.5.5 and ETR 18, subclause 6.3.
Definition: The purpose of the Bearer Capability information element is to indicate a requested
CCITT Recommendation I.231 bearer.
The coding of the BC information element used in this TBR are given in figure 1 and figure 2.
87 6 5 4 3 2 1
Bearer capability
0 0 0 0 0 1 0 0 Octet 1
information element identifier
0 0 0 0 0 0 1 1 Octet 2
Length of information element
1 0 0 0 0 0 0 0 Octet 3
CCITT Speech
1 0 0 1 0 0 0 0 Octet 4
Ext Circuit Mode 64 kbit/s
1 0 1 0 0 0 1 1 Octet 5
Ext Layer 1 G.711 A-law
Figure 1: Coding of Bearer capability (BC) information element indicating speech
87 6 5 4 3 2 1
Bearer capability
0 0 0 0 0 1 0 0 Octet 1
information element identifier
0 0 0 0 0 0 1 1 Octet 2
Length of information element
1 0 0 1 0 0 0 0 Octet 3
CCITT 3,1 kHz Audio
1 0 0 1 0 0 0 0 Octet 4
Ext Circuit Mode 64 kbit/s
1 0 1 0 0 0 1 1 Octet 5
Ext Layer 1 G.711 A-law
Figure 2: Coding of Bearer capability (BC) information element indicating 3,1 kHz audio

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TBR 8: October 1998
7.1.2 High Layer Compatibility (HLC) information element
Reference: ETS 300 102-1, subclause 4.5.16 and ETR 18, subclause 6.3.
Definition: The purpose of the HLC information element is to provide a means which should be used by
the remote user for compatibility checking.
The coding of the HLC information used in this TBR is given in figure 3.
87 6 5 4 3 2 1
High layer compatibility
0 1 1 1 1 1 0 1 Octet 1
information element identifier
0 0 0 0 0 0 1 0 Octet 2
Length of information element
1 0 0 1 0 0 0 1 Octet 3
CCITT First Protocol Profile
Telephony Octet 4
10 0 0 0 0 0 1
Figure 3: Coding of High Layer Compatibility (HLC) information element indicating telephony
7.1.3 Low Layer Compatibility (LLC) information element
Reference: ETS 300 102-1, subclause 4.5.18 and ETR 18, subclause 6.3
Definition: The purpose of the LLC information element is to provide a means which should be used for
compatibility checking by an addressed entity (e.g. a remote user or an interworking unit or a high layer
function network node addressed by the calling user). The LLC information element is transferred
transparently by an ISDN between the call originating entity (e.g. the calling user) and the addressed
entity.
The coding of the LLC information element used in this TBR are given in figure 4 and figure 5.
87 6 5 4 3 2 1
Low layer compatibility
0 1 1 1 1 1 0 0 Octet 1
information element identifier
0 0 0 0 0 0 1 0 Octet 2
Length of information element
Coding Information Transfer
1 0 0 0 0 0 0 0 Octet 3
CCITT Capability = Speech
Transfer Information Transfer
1 0 0 1 0 0 0 0 Octet 4
Mode = Circuit Rate = 64 kbit/s
Figure 4: Coding of the LLC information element indicating speech

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TBR 8: October 1998
87 6 5 4 3 2 1
Low Layer Compatibility
0 1 1 1 1 1 0 0 Octet 1
information element identifier
0 0 0 0 0 0 1 1 Octet 2
Length of information element
Coding Information Transfer
1 0 0 0 0 0 0 0 Octet 3
CCITT Capability = Speech
Transfer Information Transfer
1 0 0 1 0 0 0 0 Octet 4
Mode = Circuit Rate = 64 kbit/s
Layer 1 User info layer 1 protocol =
1 0 1 0 0 0 1 1 Octet 5
Identity Recommendation G.711 A-law
Figure 5: Coding of the LLC information element indicating speech,
CCITT Recommendation G.711 [10] A-law
7.2 Outgoing calls, inclusion and coding of the compatibility elements
Reference: ETS 300 102-1, subclause 5.1 and I-ETS 300 245-1, subclause 5.1.
Requirement: Provision for outgoing calls is optional (see clause 7). If provided the following shall apply.
a) The coding of the Bearer Capability (BC) information element in an outgoing SETUP message shall
be as described in figure 1.
b) The HLC information element shall be included in the SETUP message and shall be encoded as
described in figure 3.
c) The LLC information element is optional in an outgoing SETUP message. If included in an outgoing
SETUP message than it shall be encoded as described in either figure 4 or figure 5.
An outgoing SETUP message may contain two BC and/or HLC information elements. In this case, the first
BC and/or HLC information element shall be coded as described in this subclause. The coding of the
second BC, HLC and LLC is not specified in this TBR.
Test: These requirements a), b) and c) shall be tested according to the procedures of annex B, by
performing Test case TC20002a.
7.3 Incoming calls - compatibility checking
Reference: ETS 300 102-1, subclause 5.2 and I-ETS 300 245-1, subclause 5.2.
Requirement: Provision for incoming calls is optional (see 7). If provided, the following shall apply.
An incoming SETUP message containing any valid combination of BC, HLC and LLC information
elements, as listed in table 1, items a to f shall be accepted by the terminal according to the procedures of
ETS 300 102-1.
If the LLC information element is present and its content does not match the content of the BC information
element it shall be ignored, see table 1, item g.
If the coding of the BC information element is 3,1 kHz audio, the incoming call shall be accepted if the
received SETUP message also contains a Progress indicator information element with progress
description #1 or #3 (in this case the call is a 3,1 kHz telephony call, but the originating interface is not an
ISDN, see ETS 300 102-1, subclause 5.2.6), see table 1, item h.

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TBR 8: October 1998
Table 1: Combination of codings of BC, HLC, LLC and PI which shall be accepted by the terminal
Test BC HLC LLC PI
a figure 1 - - not relevant
b figure 1 figure 3 - not relevant
c figure 1 - figure 4 not relevant
d figure 1 - figure 5 not relevant
e figure 1 figure 3 figure 4 not relevant
f figure 1 figure 3 figure 5 not relevant
g figure 1 figure 3 incompatible not relevant
(e.g. m law)
h figure 2 - - PI = #1 or #3
NOTE 1: In association with the support of other bearer services than those specified in this
TBR or teleservices other than telephony 3,1 kHz, a multimedia or multiservice
terminal may accept, as compatible, incoming calls with codings of the BC, HLC, and
LLC information elements other than those specified in this TBR.
NOTE 2: An incoming SETUP message may contain two BC and/or HLC information elements.
In this case, only the first BC and HLC information element is relevant.
Test: The requirements a) to h) shall be tested according to the procedures of annex B, by performing
test cases TC10005a to TC10005h.
8 Transmission aspects
8.1 General
8.1.1 Encoding
Reference: I-ETS 300 245-2, subclause 5.1.1.
Requirement: The encoding law shall conform to CCITT Recommendation G.711 [10] (A-law) at
64 kbit/s.
Test: Conformance to this requirement shall be verified by applying incoming test signals encoded in
A-law at 64 kbit/s, and decoding outgoing test signals using the A-law for all the relevant tests of this
clause.
8.1.2 Volume control
Reference: I-ETS 300 245-2, subclause 5.1.3.
Requirement: Unless stated otherwise, the requirements shall apply for all positions of the user-
controlled receiving volume control, if provided.
Test: Compliance tests shall be carried out at the maximum of this volume control, where provided,
unless stated otherwise.
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TBR 8: October 1998
8.2 Speech performance characteristics (handset telephony 3,1 kHz)
8.2.1 Sensitivity - frequency response
8.2.1.1 Sending
Reference: I-ETS 300 245-2, subclause 5.2.1.1.
Requirement: The sending sensitivity - frequency response (from the Mouth Reference Point (MRP) to
the digital interface) shall be within a mask which can be drawn between the points given in table 2. The
mask is drawn with straight lines between the break points in table 2 on a logarithmic (frequency) - linear
(dB sensitivity) scale.
Table 2: Sending sensitivity/frequency mask
Frequency (Hz) Upper limit Lower limit
100 -10
200 0
300 0 -14
1 000 0 -8
2 000 4 -8
3 000 4 -8
3 400 4 -11
4 000 0
All sensitivity values are dB on an arbitrary scale.
Test: Compliance shall be checked by the test described in annex A, subclause A.2.1.1.
8.2.1.2 Receiving
Reference: I-ETS 300 245-2, subclause 5.2.1.2.
Requirement: The receiving sensitivity-frequency response (from the digital interface to the Ear
Reference Point (ERP)) shall be within the mask which can be drawn between the points given in table 3.
The mask is drawn with straight lines between the break points in table 3 on a logarithmic (frequency) -
linear (dB sensitivity) scale.
Table 3: Receiving sensitivity/frequency mask
Frequency (Hz) Upper limit Lower limit
100 -6
200 0
300 2 -9
500 * -7
1 000 0 -7
3 000 4 -7
3 400 4 -12
4 000 4
All sensitivities are dB on an arbitrary scale.
* = the limit at intermediate frequencies lies on a straight line drawn between the given values on
a logarithmic (frequency) - linear (dB) scale.
Test: Compliance shall be checked by the test described in annex A, subclause A.2.1.2.

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8.2.2 Sending and Receiving Loudness Ratings (SLR and RLR)
8.2.2.1 Nominal values
Reference: I-ETS 300 245-2, subclause 5.2.2.1.
Requirement: The nominal values are:
- SLR = 7 dB;
- RLR = 3 dB.
The tolerances on both SLR and RLR are ±3,5 dB.
Test: Compliance shall be checked by the tests described in annex A, subclauses A.2.2.1 and A.2.2.2.
8.2.2.2 Volume control
Reference: I-ETS 300 677, subclause 4.1.4.
Requirement: For TE with a user-controlled receiving volume control, the speech performance
characteristics requirements apply with the user-controlled receiving volume control at the setting where
the RLR is as close as possible to 3 dB, unless stated otherwise. This setting is to be taken as the
nominal setting of the volume control.
Test: Compliance tests of annex A will be carried out at the setting of the volume control where the RLR is
as close as possible to 3 dB, unless otherwise specified in the appropriate requirement.
8.2.3 Sidetone
8.2.3.1 Talker sidetone
Reference: I-ETS 300 245-2, subclause 5.2.3.1.
Requirement:
a) The value of the SideTone Masking Rating (STMR) shall be 13 dB to 18 dB when corrected to
nominal values of SLR and RLR (SLR = 7 dB, RLR = 3 dB).
b) Where a user-controlled receiving volume control is provided the STMR shall meet the requirement
given above at the setting where the RLR is equal to the nominal value (RLR = 3 dB).
NOTE: Correction to nominal values can be calculated using the formula
STMR - (SLR - 7 + RLR - 3).
Test: Compliance shall be checked by the test described in annex A, subclause A.2.3.1.

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TBR 8: October 1998
8.2.3.2 Listener sidetone
Reference: I-ETS 300 245-2, subclause 5.2.3.2.
Requirement:
a) The value of the Listener SideTone Rating (LSTR) shall be not less than 13 dB when corrected to
nominal values of SLR and RLR (SLR = 7 dB, RLR = 3 dB).
b) Where a user-controlled receiving volume control is provided, LSTR shall meet the requirement
given above at the setting where the RLR is equal to the nominal value (RLR = 3 dB).
NOTE: Correction to nominal values can be calculated using the formula
LSTR - (SLR - 7 + RLR - 3).
c) Where the apparatus supplier has requested the use of a type 3.2 artificial ear as described in
annex A, subclause A.1.3.1, conformance to the requirement specified in item a) of this subclause
shall be checked by verifying that the value of the D-factor as measured in annex A,
subclause A.2.3.2.3 is equal to or greater than 0.
Test: Compliance shall be checked by the relevant test described in annex A, subclause A.2.3.2.
8.2.4 Terminal Coupling Loss (TCL)
8.2.4.1 Weighted Terminal Coupling Loss (TCLw)
Reference: I-ETS 300 245-2, subclause 5.2.4.1.
Requirement:
a) When corrected to the nominal values of SLR and RLR (SLR = 7 dB, RLR = 3 dB), the TCLw shall
not be less than 40 dB.
b) For all positions of the user controlled volume control the TCLw shall not be less than 35 dB.
Test: Compliance shall be checked by the test described in annex A, subclause A.2.4.1.
8.2.4.2 Stability loss
Reference: I-ETS 300 245-2, subclause 5.2.4.2.
Requirement: With the handset lying on and the transducers facing a hard surface, the attenuation from
the digital input to the digital output shall be at least 6 dB at all frequencies in the range of 200 Hz to
4 kHz.
Test: Compliance shall be checked by the test described in annex A, subclause A.2.4.2.
8.2.5 Distortion
8.2.5.1 Sending
The terminal shall meet the requirements of both subclauses 8.2.5.1.1 and 8.2.5.1.2.
8.2.5.1.1 Method 1 (Pseudo random noise stimulus)
Reference: I-ETS 300 245-2, subclause 5.2.5.1.1.
Requirement: The ratio of signal-to-total distortion (harmonic and quantizing) power of the digitally
encoded signal output by the terminal equipment shall be greater than the limits given in table 4 unless the
sound pressure at the MRP is greater than +5 dBPa.

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TBR 8: October 1998
Table 4: Limits for signal-to-total distortion ratio for method 1
Sending level dB Receiving level at the Sending Receiving
relative to ARL digital interface Ratio (dB) Ratio (dB)
-45 -55 dBm0 5,0 5,0
-30 -40 dBm0 20,0 20,0
-24 -34 dBm0 25,5 25,5
-17 -27 dBm0 30,2 30,6
-10 -20 dBm0 32,4 33,0
0 -10 dBm0 33,0 33,7
+4 -6 dBm0 30,0 30,0
+7 -3 dBm0 20,0 20,0
Limits for intermediate levels are found by drawing straight lines between the break points in table 4 on a
linear (dB signal level) - linear (dB ratio) scale.
Test: Compliance shall be checked by the test described in annex A, subclause A.2.5.1.1.
8.2.5.1.2 Method 2 (Sinusoidal test signal)
Reference: I-ETS 300 245-2, subclause 5.2.5.1.2.
Requirement: The ratio of signal-t
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