ETSI TBR 008 ed.1 (1994-09)

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

DTBR/TE-04121

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

General Information

• Status: Published
• Publication Date: 29-Sep-1994
• Technical Committee: TE 4 - Audiovisual and Voice Terminals
• Current Stage: 12 - Completion
• Due Date: 15-Oct-1994
• Completion Date: 30-Sep-1994
• Mandate: T-237H
• Ref Project: SIST TBR 008 E1:2004 - Integrated Services Digital Network (ISDN); Telephony 3,1 kHz teleservice; Attachment requirements for handset terminals

Standards Content (Sample)

SLOVENSKI STANDARD
SIST TBR 008 E1:2004
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 1
ICS:
33.080 Digitalno omrežje z Integrated Services Digital
integriranimi storitvami Network (ISDN)
(ISDN)
SIST TBR 008 E1:2004 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST TBR 008 E1:2004
TECHNICAL TBR 8
BASIS for September 1994
REGULATION
Source: ETSI TC-TE Reference: DTBR/TE-04121
ICS: 33.080
ISDN, telephony 3,1 kHz teleservice
Key words:
Integrated Services Digital Network (ISDN);
Telephony 3,1 kHz teleservice
Attachment requirements for handset terminals
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
F-06921 Sophia Antipolis CEDEX - FRANCE
Postal address:
650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
Office address:
c=fr, a=atlas, p=etsi, s=secretariat - [e-mail]
X.400: Internet:
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 1994. All rights reserved.
New presentation - see History box

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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 Editing and Standards Approval Dept." at the address shown on the title page.

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Contents
Foreword.7
1 Scope .9
2 Normative references .9
3 Definitions and abbreviations. 11
3.1 Definitions. 11
3.2 Abbreviations. 12
4 Safety requirements . 12
5 Electro-Magnetic Compatibility (EMC) requirements. 12
6 Access channel selection . 12
7 Call control functions. 12
7.1 Outgoing calls. 13
7.1.1 Overlap and en-bloc sending . 13
7.1.2 Coding of Bearer Capability (BC) information element. 13
7.1.3 Coding of High Layer Compatibility (HLC) information element . 13
7.1.4 Coding of Low Layer Compatibility (LLC) information element. 14
7.2 Incoming calls. 15
7.2.1 Compatibility checking . 15
7.2.1.1 Coding of BC information element . 15
7.2.1.2 Coding of HLC information element . 16
7.2.1.3 Coding of LLC information element. 16
7.2.1.4 Terminal selection. 16
7.2.1.4.1 Support of supplementary services
(MSN/SUB). 16
7.2.1.4.2 Operation of the designated terminal
under restricted power conditions. 17
7.2.2 Incoming call indication . 17
7.2.2.1 Terminal is not engaged in a telephone call. 17
7.2.2.2 Terminal is busy . 17
7.3 Information tones . 18
8 Transmission aspects . 18
8.1 General. 18
8.1.1 Encoding . 18
8.1.2 Relative level. 18
8.1.3 Volume control. 18
8.2 Speech performance characteristics (handset telephony 3,1 kHz). 18
8.2.1 Sensitivity - frequency response . 18
8.2.1.1 Sending . 18
8.2.1.2 Receiving . 19
8.2.2 Sending and Receiving Loudness Ratings (SLR and RLR) . 19
8.2.2.1 Nominal values . 19
8.2.2.2 Volume control . 19
8.2.3 Sidetone. 19
8.2.3.1 Talker sidetone. 19
8.2.3.2 Listener sidetone. 20
8.2.4 Terminal Coupling Loss (TCL) . 20
8.2.4.1 Weighted Terminal Coupling Loss (TCLw) . 20

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8.2.4.2 Stability loss.20
8.2.5 Distortion.20
8.2.5.1 Sending.20
8.2.5.1.1 Method 1 (Pseudo random noise
stimulus) .20
8.2.5.1.2 Method 2 (Sinusoidal test signal) .21
8.2.5.2 Receiving .21
8.2.5.2.1 Method 1 (Pseudo random noise
signal) .21
8.2.5.2.2 Method 2 (Sinusoidal test signal) .22
8.2.5.3 Sidetone .22
8.2.6 Variation of gain with input level.22
8.2.6.1 Sending.22
8.2.6.2 Receiving .22
8.2.7 Out-of-band signals .23
8.2.7.1 Discrimination against out-of-band input signals (sending) . 23
8.2.7.2 Spurious out-of-band (receiving).23
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) .24
8.2.9 Acoustic shock.24
8.2.10 Delay.24
8.3 Loudspeaking and handsfree telephony.24
9 Power feeding.24
9.1 General conditions.24
9.2 Operation under restricted power conditions.24
10 Physical modules.24
10.1 Handset.24
10.2 Alerting module .25
10.2.1 Sound pressure level .25
10.2.2 Alerting module control.25
10.2.2.1 Starting.25
10.2.2.2 Stopping .25
10.2.3 Adjustment of sound characteristics . 26
11 Testing and approval methodology.26
Annex A (normative): Test specifications . 27
A.1 General conditions for testing.27
A.1.1 Environment for tests. 27
A.1.2 Power supply limitations.27
A.1.3 Test equipment interface.27
A.1.4 Test equipment requirements .27
A.1.4.1 Electro-acoustic equipment .27
A.1.4.2 Test equipment for digital telephone sets.27
A.1.4.2.1 Codec approach and specification.27
A.1.4.2.2 Direct digital processing approach.29
A.1.5 Alternative test methods . 29
A.1.6 Accuracy of test equipment.29
A.1.7 Bandwidth.29
A.2 Transmission requirements testing.29
A.2.1 Sensitivity/frequency response .29
A.2.1.1 Sending . 29
A.2.1.2 Receiving.30
A.2.2 Loudness ratings.30

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A.2.2.1 Sending Loudness Rating (SLR). 30
A.2.2.2 Receiving Loudness Rating (RLR). 30
A.2.3 Sidetone. 31
A.2.3.1 Talker sidetone . 31
A.2.3.2 Listener sidetone. 31
A.2.4 Terminal Coupling Loss. 32
A.2.4.1 Weighted Terminal Coupling Loss (TCLw). 32
A.2.4.2 Stability loss . 32
A.2.5 Distortion. 33
A.2.5.1 Sending. 33
A.2.5.1.1 Method 1 . 33
A.2.5.1.2 Method 2 . 33
A.2.5.2 Receiving. 34
A.2.5.2.1 Method 1 . 34
A.2.5.2.2 Method 2 . 34
A.2.5.3 Sidetone. 34
A.2.6 Variation of gain with input level. 34
A.2.6.1 Sending. 34
A.2.6.2 Receiving. 35
A.2.7 Out-of-band signals. 35
A.2.7.1 Discrimination against out-of-band input signal. 35
A.2.7.2 Spurious out-of-band signals . 35
A.2.8 Noise . 35
A.2.8.1 Sending. 35
A.2.8.2 Receiving. 35
A.2.8.3 Level of sampling frequency (receiving). 35
A.2.9 Delay . 36
A.3 Audible alerting module. 37
A.3.1 Sound pressure level measurement . 37
A.3.1.1 Measurement conditions . 37
A.3.1.2 Measurement method. 37
Annex B (informative): Test Report Format . 38
B.1 Identification . 38
B.1.1 Identification of the Document . 38
B.1.2 Identification of the testing laboratory . 38
B.1.3 Identification of the client . 38
B.1.4 Identification of the test item . 38
B.1.5 Use of subcontractors . 39
B.2 Test conditions. 39
B.3 Test equipment . 39
B.4 Test results. 39
B.4.1 Call control functions . 39
B.4.2 Speech transmission characteristics . 39
B.4.3 Loudspeaking or handsfree telephony. 39
B.4.4 Power feeding . 39
B.4.5 Physical modules . 39
B.5 Summary and conclusion. 40
Annex C (informative): Acoustic shock requirements. 41
C.1 Continuous signal . 41
C.2 Peak signal. 41

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Annex D (informative): Bibliography.41
History .42

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Foreword
This Technical Basis for Regulation (TBR) has been produced by the Terminal Equipment (TE) Technical
Committee of the European Telecommunications Standards Institute (ETSI).

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1 Scope
This TBR specifies the technical characteristics (electrical, logical and acoustic) to be provided by terminal
equipment for the telephony 3,1 kHz teleservice which is capable of connection to a coincident S and T
reference point at an interface to a public telecommunications network presented as an Integrated
Services Digital Network (ISDN) basic access point.
The objective of this TBR is to ensure interworking between terminal equipment via the public network.
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.
This TBR is applicable to terminal equipment of the functional group defined as Terminal Equipment Type 1
(TE1) in CCITT Recommendation I.411 [1] which supports the telephony 3,1 kHz teleservice.
This TBR applies to apparatus for household, office and similar general indoor use. It includes all the
functions necessary to provide real-time 2-way speech conversation. 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.
A test is given for each requirement in this TBR including measurement methods. The terminal equipment
may be stimulated to perform the tests by additional equipment if necessary.
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.
NOTE 1: This TBR only applies to items of terminal equipment with an integral user-network
interface for ISDN basic access, and which have a handset. Terminal equipment with a
switching function which is not covered by the definition of TE1 is outside the scope of
this TBR.
NOTE 2: This TBR does not apply to terminal equipment which may be supplied in some
countries for connection to an interim ISDN corresponding to, but not wholly compatible
with, the ISDN basic access standards.
NOTE 3: 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.
[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] CCITT Recommendation G.701 (1988): "Vocabulary of digital transmission and
multiplexing, and pulse code modulation (PCM) terms".

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[4] ETS 300 153 (1992): "Integrated Services Digital Network (ISDN); Attachment
requirements for terminal equipment to connect to an ISDN using ISDN basic
access (NET 3 Part 1)".
ETS 300 104 (1991): "Integrated Services Digital Network (ISDN); Attachment
requirements for terminal equipment to connect to an ISDN using ISDN basic
access, Layer 3 aspects (NET 3, Part 2)".
NOTE 1: Reference [4] is intended to be replaced by CTR 3 "Integrated Services Digital
Network (ISDN); Attachment requirements for terminal equipment to connect to an
ISDN using ISDN basic access". When this takes place, all references in this TBR to
NET 3 (ETS 300 153 and ETS 300 104 [4]) will refer to CTR 3.
NOTE 2: ETS 300 104 [4] contains test descriptions and a requirements part that refers out to
ETS 300 102-1.
NOTE 3: ETS 300 153 [4] contains test descriptions and a requirements part that refers out to
ETS 300 012 (Layer 1) and ETS 300 125 (Layer 2).
[5] ETS 300 111 (1992): "Integrated Services Digital Network (ISDN); Telephony
3,1 kHz teleservice, Service description".
[6] IEC 651: "Sound level meters".
[7] CCITT Recommendation G.122 (1988): "Influence of national systems on
stability, talker echo, and listener echo in international connections".
[8] CCITT Recommendation G.101 (1988): "The transmission plan".
[9] CCITT Recommendation G.223 (1988): "Assumptions for the calculation of noise
on hypothetical reference circuits for telephony".
[10] ITU-T Recommendation P. 57 (1993): "Artificial ears".
[11] ITU-T Recommendation P.51 (1993): "Artificial mouth".
[12] CCITT Recommendation O.133 (1988): "Equipment for measuring the
performance of PCM encoders and decoders".
[13] CCITT Recommendation G.712 (1992): "Transmission performance
characteristics of pulse code modulation".
[14] CCITT Recommendation G.711 (1988): "Pulse code modulation (PCM) of voice
frequencies".
[15] ITU-T Recommendation P.64 (1993): "Determination of sensitivity/frequency
characteristics of local telephone systems to permit calculation of their loudness
ratings".
[16] ISO 3 (1973): "Preferred numbers - series of preferred numbers".
[17] ITU-T Recommendation P.79 (1993): "Calculation of loudness ratings".
[18] IEC 225: "Octave, half-octave and third-octave band filters intended for the
analysis of sound and vibrations".
[19] CCITT Recommendation O.131 (1988): "Quantizing distortion measuring
equipment using a pseudo-random noise test signal".

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[20] CCITT Recommendation O.132 (1988): "Quantizing distortion measuring
equipment using a sinusoidal test signal".
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
CCITT Recommendation G.701 [3] apply.
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 [6].
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 [6].
Designated terminal: The terminal which is permitted to draw power from power source 1 under
restricted power conditions as specified in ETS 300 153 (NET 3, Part 1) [4].
Digital interface: The interface at the coincident S and T reference point.
Multimedia terminal: A terminal that simultaneously supports two or more media.
Multiservice terminal: A terminal that supports two or more teleservices.
Normal Power Condition: As defined in ETS 300 153 (NET 3, Part 1) [4].
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 ETS 300 153 (NET 3, Part 1) [4].
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 [5].
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
CCITT Recommendation G.122 [7].
3,1 kHz telephony terminal: A terminal that supports the telephony 3,1 kHz teleservice as described in
ETS 300 111 [5].

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3.2 Abbreviations
For the purposes of this TBR, the relevant abbreviations given in ITU-T Recommendation P.10 [2] and
CCITT Recommendation G.701 [3], apply plus the following:
ARL Acoustic Reference Level
BC Bearer Capability
DTS Digital Test Sequence
EMC Electro-Magnetic Compatibility
ERP Ear Reference Point
HLC High Layer Compatibility
ISDN Integrated Services Digital Network
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
MSN Mutiple Subscriber Number
STMR SideTone Masking Rating
TBR Technical Basis for Regulation
TCL Terminal Coupling Loss
TCLw Weighted Terminal Coupling Loss
RLR Receiving Loudness Ratings
SLR Sending Loudness Ratings
SUB Subaddressing
4 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 4 (a) and 4 (b) of Directive 91/263/EEC.
5 Electro-Magnetic 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.
6 Access channel selection
Access through any B-channel shall be possible. Channel selection shall be in accordance with ETS
300 104 (NET 3, Part 2) [4].
The functional characteristics of the terminal shall be independent of the B-channel selected.
Compliance shall be tested in accordance with ETS 300 104 (NET 3, Part 2) [4] by random choice of the
B-channel during measurements, according to Clause 8: Transmission aspects.
7 Call control functions
At least one of the following shall be implemented:
- outgoing calls;

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