ETSI ETS 300 903 ed.4 (1999-07)

Digital cellular telecommunications system (Phase 2+) (GSM); Transmission planning aspects of the speech service in the GSM Public Land Mobile Network (PLMN) system (GSM 03.50 version 5.3.1 Release 1996)

RE/SMG-110350QR3

Digitalni celični telekomunikacijski sistem (faza 2+) – Vidiki načrtovanja oddajanja govorne storitve v javnem kopenskem mobilnem omrežju (PLMN) sistema GSM (GSM 03.50, različica 5.3.1, izdaja 1996)

General Information

• Status: Published
• Publication Date: 20-Jul-1999
• Technical Committee: SMG 11 - Speech Aspects
• Current Stage: 12 - Completion
• Due Date: 23-Jul-1999
• Completion Date: 21-Jul-1999
• Ref Project: SIST ETS 300 903 E4:2003 - Digital cellular telecommunications system (Phase 2+) (GSM); Transmission planning aspects of the speech service in the GSM Public Land Mobile Network (PLMN) system (GSM 03.50 version 5.3.1 Release 1996)

Standards Content (Sample)

SLOVENSKI STANDARD
SIST ETS 300 903 E4:2003
01-december-2003
'LJLWDOQLFHOLþQLWHOHNRPXQLNDFLMVNLVLVWHPID]D±9LGLNLQDþUWRYDQMDRGGDMDQMD
JRYRUQHVWRULWYHYMDYQHPNRSHQVNHPPRELOQHPRPUHåMX3/01VLVWHPD*60
*60UD]OLþLFDL]GDMD
Digital cellular telecommunications system (Phase 2+) (GSM); Transmission planning
aspects of the speech service in the GSM Public Land Mobile Network (PLMN) system
(GSM 03.50 version 5.3.1 Release 1996)
Ta slovenski standard je istoveten z: ETS 300 903 Edition 4
ICS:
33.070.50 Globalni sistem za mobilno Global System for Mobile
telekomunikacijo (GSM) Communication (GSM)
SIST ETS 300 903 E4:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 903 E4:2003

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SIST ETS 300 903 E4:2003
EUROPEAN ETS 300 903
TELECOMMUNICATION July 1999
STANDARD Fourth Edition
Source: SMG Reference: RE/SMG-110350QR3
ICS: 33.020
Key words: Digital cellular telecommunications system, Global System for Mobile communications (GSM)
R
GLOBAL SYSTEM FOR
MOBILE COMMUNICATIONS
Digital cellular telecommunications system (Phase 2+);
Transmission planning aspects
of the speech service in the GSM
Public Land Mobile Network (PLMN) system
(GSM 03.50 version 5.3.1 Release 1996)
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 1999. All rights reserved.

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ETS 300 903 (GSM 03.50 version 5.3.1 Release 1996): 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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ETS 300 903 (GSM 03.50 version 5.3.1 Release 1996): July 1999
Contents
Intellectual Property Rights.7
Foreword .7
1 Scope .9
1.1 Normative references .9
1.2 Abbreviations .11
1.3 Introduction .12
2 Network configurations.12
2.1 General .12
2.2 Model of the PLMN .12
2.3 Interfaces .12
2.4 Configurations of connections .13
2.4.1 General configurations of connections.13
2.4.2 Reference configurations to illustrate delay and echo control issues.13
2.5 4-wire circuits in the PLMN .14
3 Transmission performance .14
3.1 Overall Loss/Loudness ratings .15
3.1.1 Connections with handset MSs .15
3.1.2 Connections with handsfree MSs.16
3.1.3 Connections with headset MSs .16
3.2 Stability Loss.16
3.3 Delay.17
3.3.1 General.17
3.3.2 Sources of delay.17
3.3.2.1 Elements of the PLMN that cause delay.17
3.3.2.2 Elements of the PSTN that cause delay.17
3.3.3 Effects of delay.17
3.3.4 Allocation of delay to the PLMN .18
3.3.4.1 Allocation of delay to the PLMN when using a full rate
system .18
3.3.4.2 Allocation of delay to the PLMN when using a half rate
system .18
3.3.5 Delay of various network configurations.18
3.3.5.1 National and international connections with no echo
control in the PSTN (reference configurations A).18
3.3.5.2 National and international connections with echo control
in the PSTN (reference configurations B).18
3.3.5.3 Connections where re-routeing leads to a significant
increase in transmission path length (reference
configurations C) .19
3.3.6 Delay related requirements on the MS.19
3.3.6.1 Full rate MS .19
3.3.6.2 Half rate MS.19
3.3.6.3 Handsfree MS.19
3.4 Echo.19
3.4.1 General.19
3.4.2 Electrical echo control in the PLMN (Reference configurations A) .20
3.4.3 Acoustic echo control in the PLMN .20
3.4.3.1 Acoustic echo control in a handsfree MS .20
3.4.3.2 Acoustic echo control in a handset MS .20
3.4.3.3 Acoustic echo control in a headset MS .20
3.4.4 Interaction between tandem echo control devices (reference
configurations B & C) .20
3.5 Clipping .21

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ETS 300 903 (GSM 03.50 version 5.3.1 Release 1996): July 1999
3.5.1 General . 21
3.5.2 Properties of voice switches in the PLMN . 21
3.5.3 Problems of tandem voice switching . 21
3.6 Idle channel noise (handset and headset MS). 21
3.6.1 Sending. 21
3.6.2 Receiving . 22
3.7 Noise contrast . 22
3.7.1 General . 22
3.7.2 Elements of a PLMN which can cause noise contrast impairment. 22
3.7.3 Reduction of noise contrast . 23
3.7.3.1 Reduction of noise contrast by limiting the noise received
by the microphone. 23
3.7.3.1.1 Headset MS. 23
3.7.3.1.2 Handset MS. 23
3.7.3.1.3 Handsfree MS . 23
3.7.3.2 Reduction of noise contrast by insertion of comfort noise . 23
3.7.4 Consequence of the introduction of high comfort noise levels on other
voice-operated devices. 24
3.8 Sensitivity/frequency characteristics . 24
3.8.1 Headset and Handset MSs. 24
3.8.1.1 Sending. 24
3.8.1.2 Receiving . 24
3.8.2 Handsfree MS. 25
3.8.2.1 Sending. 25
3.8.2.2 Receiving . 26
3.9 Distortion (handset and headset MS). 26
3.9.1 Sending. 26
3.9.2 Receiving . 27
3.10 Sidetone (handset and headset MS). 28
3.10.1 Sidetone loss . 28
3.10.2 Sidetone distortion . 28
3.11 Out-of-band signals. 28
3.11.1 Discrimination against out-of-band input signals . 28
3.11.1.1 Handset and headset MS. 28
3.11.1.2 Handsfree MS . 28
3.11.2 Spurious out-of-band signals. 29
3.11.2.1 Handset and headset MS. 29
3.11.2.2 Handsfree MS . 29
3.12 Requirements for information tones. 29
3.13 Crosstalk . 29
3.13.1 Near and far end crosstalk . 29
3.13.2 Go/return crosstalk . 30
3.14 MS Ambient Noise Rejection . 30
3.14.1 Full-Rate, (TCH-FS) MS Ambient Noise Rejection (handset MS). 30
3.14.2 Full-Rate, (TCH-FS) MS Ambient Noise Rejection (handsfree MS). 30
3.14.3 Half-Rate, (TCH-HS) MS and Dual-Rate (TCH-FS and TCH-HS) MS
Ambient Noise Rejection . 30
Annex A (informative): Considerations on the Acoustic Interface of the Mobile Station . 39
A.1 Handsfree MS. 39
A.2 Handset MS. 39
A.3 Headset MS. 39
A.4 Inter-reaction with DTX. 39
Annex B (normative): Test considerations. 40
B.1 Test signals. 40
B.1.1 Sinusoidal signals. 40
B.1.2 Artificial voice . 40

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ETS 300 903 (GSM 03.50 version 5.3.1 Release 1996): July 1999
B.2 Test signal levels.40
B.2.1 Sending.40
B.2.1.1 Handset and headset MSs.40
B.2.1.2 Office type Handsfree MS .40
B.2.1.3 Car type Handsfree MS.41
B.2.2 Receiving .41
B.3 Test rooms .41
B.3.1 Anechoic room.41
B.4 Test arrangement.42
B.4.1 Electro-acoustic equipment .42
B.4.2 Test arrangement for handsfree MS.43
B.4.2.1 Office type handsfree MS.43
B.4.2.2 Car type handsfree MS .43
B.4.2.3 Use of HATS for testing the receive characteristics of the car type
handsfree MS.44
B.4.2.3.1 Equalization of HATS.44
B.4.2.3.2 Combination of ear signals .45
Annex C (normative): Transmission requirements testing .46
C.1 Loudness ratings.46
C.1.1 Sending Loudness Rating (SLR) - Handset MS .46
C.1.2 Sending Loudness Rating (SLR) - Handsfree MS .46
C.1.3 Receiving Loudness Rating (RLR) - Handset MS .46
C.1.4 Receiving Loudness Rating (RLR) - Handsfree MS .47
C.2 Idle Channel Noise .47
C.2.1 Sending.47
C.2.2 Receiving .47
C.3 Sensitivity/frequency characteristics .47
C.3.1 Sending - Handset MS.47
C.3.2 Sending - Handsfree MS.48
C.3.3 Receiving - Handset.48
C.3.4 Receiving - Handsfree .49
C.4 Distortion .49
C.4.1 Sending.49
C.4.2 Receiving .50
C.5 Variation of gain with input level.50
C.5.1 Sending.50
C.5.2 Receiving .50
C.6 Sidetone .50
C.6.1 Talker sidetone (STMR).50
C.6.2 Listener sidetone (LSTR).50
C.7 Sidetone distortion.51
C.8 Out-of-band signals.51
C.8.1 Discrimination against out-of-band input signal for handset and headset MS.51
C.8.2 Spurious out-of-band signals for handset and headset MS.51
C.8.3 Discrimination against out-of-band signals for handsfree MS .51
C.8.4 Spurious out-of-band emissions for handsfree MS .51
C.9 Acoustic echo loss.52
C.9.1 Acoustic echo loss - Handset MS .52
C.9.2 Acoustic echo loss - Handsfree MS.52
C.10 Delay for handsfree MS.53

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C.10.1 Uplink . 53
C.10.2 Downlink. 53
C.10.3 Result . 53
C.11 Ambient noise rejection . 54
C.11.1 Full-Rate, (TCH-FS) MS Ambient Noise Rejection (handset MS) . 55
C.11.2 Full-Rate, (TCH-FS) MS Ambient Noise Rejection (handsfree MS) . 55
C.11.3 Half-Rate, (TCH-HS) MS and Dual-Rate (TCH-FS and TCH-HS) MS Ambient Noise
Rejection . 55
Annex D (normative): MS delay requirement definition . 56
D.1 Full rate MS delay requirement definition . 56
D.2 Half rate MS delay requirement definition. 57
Annex E (informative): Adaptive gain control . 58
Annex F (informative): Change Request History.59
History. 60

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Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The
information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-
members, and can be found in SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially
Essential, IPRs notified to ETSI in respect of ETSI standards", which is available free of charge from the
ETSI Secretariat. Latest updates are available on the ETSI Web server (http://www.etsi.org/ipr).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI.
No guarantee can be given as to the existence of other IPRs not referenced in SR 000 314 (or the
updates on the ETSI Web server) which are, or may be, or may become, essential to the present
document.
Foreword
This European Telecommunication Standard (ETS) has been produced by the Special Mobile Group
(SMG) Technical Committee of the European Telecommunications Standards Institute (ETSI).
This ETS describes the transmission planning aspects pertaining to the speech service within the digital
cellular telecommunications system (Phase 2+).
The contents of this ETS is subject to continuing work within SMG and may change following formal SMG
approval. Should SMG modify the contents of this ETS, it will be resubmitted for OAP by ETSI with an
identifying change of release date and an increase in version number as follows:
Version 5.x.y
where:
5 indicates GSM Phase 2+ Release 1996
x the second digit is incremented for changes of substance, i.e. technical enhancements,
corrections, updates, etc.
y the third digit is incremented when editorial only changes have been incorporated in the
specification.
Transposition dates
Date of adoption of this ETS: 23 July 1999
Date of latest announcement of this ETS (doa): 31 October 1999
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 30 April 2000
Date of withdrawal of any conflicting National Standard (dow): 30 April 2000

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ETS 300 903 (GSM 03.50 version 5.3.1 Release 1996): July 1999
1 Scope
This European Telecommunication Standard (ETS) describes the transmission planning aspects
pertaining to the speech service in the GSM PLMN system. Due to technical and economic factors, there
cannot be full compliance with the general characteristics of international telephone connections and
circuits recommended by the ITU-T.
This ETS gives guidance as to the precautions, measures and minimum requirements needed for
successful interworking of the PLMN with the national and international PSTN. The ETS identifies a
number of routeing and network configurations. The objective is to reach a quality as close as possible to
ITU-T standards in order to safeguard the performance seen by PSTN customers.
1.1 Normative references
This ETS incorporates by dated and 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 ETS only when incorporated in it by amendment or revision. For undated references, the
latest edition of the publication referred to applies.
[1] GSM 01.04 (ETR 350): "Digital cellular telecommunications system (Phase 2+);
Abbreviations and acronyms".
[2] GSM 03.04: "Digital cellular telecommunications system (Phase 2); Signalling
requirements relating to routeing of calls to mobile subscribers".
[3] GSM 06.01 (ETS 300 580-1): "Digital cellular telecommunications system
(Phase 2); Full rate speech processing functions".
[4] GSM 06.10 (ETS 300 961): "Digital cellular telecommunications system (Phase
2+); Full rate speech; Transcoding".
[5] GSM 06.11 (ETS 300 962): "Digital cellular telecommunications system (Phase
2+); Full rate speech; Substitution and muting of lost frames for full rate speech
channels".
[6] GSM 06.12 (ETS 300 963): "Digital cellular telecommunications system (Phase
2+); Full rate speech; Comfort noise aspect for full rate speech traffic channels".
[7] GSM 06.31 (ETS 300 964): "Digital cellular telecommunications system (Phase
2+); Full rate speech; Discontinuous Transmission (DTX) for full rate speech
traffic channels".
[8] GSM 06.32 (ETS 300 965): "Digital cellular telecommunications system (Phase
2+); Voice Activity Detection (VAD)".
[9] GSM 06.02 (ETS 300 966): "Digital cellular telecommunications system (Phase
2+); Half rate speech; Half rate speech processing functions".
[10] GSM 06.20 (ETS 300 969): "Digital cellular telecommunications system (Phase
2+); Half rate speech; Half rate speech transcoding".
[11] GSM 06.21 (ETS 300 970): "Digital cellular telecommunications system (Phase
2+); Half rate speech; Substitution and muting of lost frames for half rate speech
traffic channels".
[12] GSM 06.22 (ETS 300 971): "Digital cellular telecommunications system (Phase
2+); Half rate speech; Comfort noise aspects for half rate speech traffic
channels".

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ETS 300 903 (GSM 03.50 version 5.3.1 Release 1996): July 1999
[13] GSM 06.41 (ETS 300 972): "Digital cellular telecommunications system (Phase
2+); Half rate speech; Discontinuous Transmission (DTX) for half rate speech
traffic channels".
[14] GSM 06.42 (ETS 300 973): "Digital cellular telecommunications system (Phase
2+); Half rate speech; Voice Activity Detection (VAD) for half rate speech traffic
channels".
[15] I-ETS 300 245-2: "Integrated Services Digital Network (ISDN): Technical
characteristics of telephony terminals: Part 2: PCM A-Law handset telephony".
[16] ITU-T Recommendation G.103 (1998): "Hypothetical reference connections".
[17] ITU-T Recommendation G.111 (1993): "Loudness ratings (LRs) in an
international connection".
[18] ITU-T Recommendation G.113 (1993): "Transmission impairments".
[19] ITU-T Recommendation G.114 (1993): "Mean one-way propagation time".
[20] ITU-T Recommendation G.121 (1993): "Loudness ratings (LRs) of national
systems".
[21] ITU-T Recommendation G.122 (1993): "Influence of national systems on
stability, talker echo, and listener echo in international connections".
[22] ITU-T Recommendation G.131 (1988): "Stability and echo".
[23] ITU
...