SIST-V ETSI/EG 202 086 V2.0.0:2009
(Main)Speech Processing, Transmission and Quality Aspects (STQ) - Objectives and principles for the transmission performance of multiple interconnected networks that aim to provide traditional quality telephony services
- Abstract
The present document specifies a simple set of objectives, principles and responsibilities for the transmission performance of multiple interconnected networks that provide "traditional quality (POTS)" circuit switched telephony services. The objectives, principles and responsibilities take account of the liberalization of telephony services and the interconnection of several separate networks, each with different topologies, in the provision of telephony connections. The present document applies to:
- national and international networks;
- Digital Networks and Integrated Digital Networks (i.e. networks where the only analogue component may be the local loop). The present document applies in the cases where the telephony service is:
- contracted between the network operator and the customer/end user; and
- contracted through a service provider.
It applies where:
- the caller pays for the call;
- the recipient pays for the call (e.g. the 800 service); or
- the cost of the call is shared by the caller and the recipient.
The present document does not apply to any segment of calls where either the calling or called terminal is a mobile "terminating network".
- Status
- Published
- Publication Date
- 05-Mar-2009
- Technical Committee
- SPN - Services and Protocols for Networks
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 20-Feb-2009
- Due Date
- 27-Apr-2009
- Completion Date
- 06-Mar-2009
Buy Documents
ETSI EG 202 086 V2.0.0 (2008-05) - Speech Processing, Transmission and Quality Aspects (STQ); Objectives and principles for the transmission performance of multiple interconnected networks that aim to provide traditional quality telephony services
ETSI EG 202 086 V2.0.0 (2008-07) - Speech Processing, Transmission and Quality Aspects (STQ); Objectives and principles for the transmission performance of multiple interconnected networks that aim to provide traditional quality telephony services
SIST-V ETSI/EG 202 086 V2.0.0:2009 is the Slovenian adoption of ETSI EG 202 086 V2.0.0, an ETSI Guide from the Speech Processing, Transmission and Quality Aspects (STQ) committee. It sets objectives, principles and responsibilities for the transmission performance of multiple interconnected networks that provide traditional quality telephony services.
The document is aimed at network operators, service providers, and planners who need to manage speech quality across more than one network boundary. It focuses on fixed circuit-switched telephony, especially where different networks, codecs, delays and echo-control choices have to work together.
What does SIST-V ETSI/EG 202 086 V2.0.0:2009 specify?
SIST-V ETSI/EG 202 086 V2.0.0:2009 specifies a simple framework for transmission performance in multiple interconnected networks that carry “traditional quality (POTS)” telephony services. It is written for national and international networks, including Digital Networks and Integrated Digital Networks where the local loop may be the only analogue part.
The scope covers services contracted directly with the network operator or through a service provider, and it applies whether the caller pays, the recipient pays, or the cost is shared. It excludes call segments where either terminal is a mobile “terminating network”.
The document is organized into Scope, References, Definitions and abbreviations, and Principles. Annex A is an informative bibliography.
What are the key requirements of SIST-V ETSI/EG 202 086 V2.0.0:2009?
Responsibility across interconnected networks
SIST-V ETSI/EG 202 086 V2.0.0:2009 treats quality as a shared responsibility when a call crosses network boundaries. Clause 4.1 says no single operator can be assumed to control the whole connection unless the call stays wholly on-net, so operators need common standards and cooperation to avoid incompatibilities.
In practice, this means each operator plans and manages the part of the call it controls, while exchanging information with other operators where codec choices, delay, or signalling behaviour could conflict.
Loudness, coding and voice activity detection
Clause 4.2.1 sets the loudness planning target for digital exchanges and analogue access sections, using Send Loudness Rating (SLR) and Receive Loudness Rating (RLR) at the A/D conversion point. The practical point is to keep speech levels within a range that preserves audibility without adding unnecessary digital loss or gain.
Clause 4.2.2 requires the encoding method at interconnection points to be bilaterally agreed and based on an ITU-T or European standard. It also warns that low bit rate coding can reduce speech quality and that operators should consider support for in-band data, facsimile and modem access.
Clause 4.2.3 adds that Voice Activity Detection (VAD) and speech multiplexing must be planned with delay and echo control in mind. Tandeming VAD devices can clip speech and reduce intelligibility, so the planner has to check how multiple devices interact.
Bit integrity, delay and echo
Clause 4.2.4 says bit integrity is only possible on a wholly digital path and may be needed for services such as 64 kbit/s unrestricted. Devices such as echo cancellers, low bit rate coders, and digital loss and gain pads break bit integrity, so they must be disableable if that service is offered.
Clause 4.2.5 says absolute delay should be minimized because mouth-to-ear delay above about 150 ms starts to harm conversation flow. Clause 4.2.6 assumes up to 5 ms of customer-side delay at the Network Termination Point (NTP) and expects echo control to use echo cancellation rather than echo suppression.
Network performance, synchronization and information
Clauses 4.2.7 to 4.2.9 cover analogue noise, crosstalk, group delay distortion, digital error performance, and synchronization. The practical effect is that operators must plan transmission, timing and clocking so that speech quality stays stable and slip-related problems stay under control.
Clause 4.3 asks operators to publish or provide on request information on transmission impairments, especially expected delay and any compression used. Clause 4.4 notes that digitalization and new transmission technologies make echo and variable delay more important in planning.
What terms does SIST-V ETSI/EG 202 086 V2.0.0:2009 define?
- Network operator - the organization that runs the network switches and transmission used to provide the service.
- Service provider - the organization that offers and provides the telephony service to the customer; it may also be the network operator.
- Network Termination Point (NTP) - the customer-side interface used in the loudness and echo assumptions.
- Send Loudness Rating (SLR) - the loudness measure used for the send direction at the access interface.
- Receive Loudness Rating (RLR) - the loudness measure used for the receive direction at the access interface.
- Voice Activity Detection (VAD) - a method that reduces transmitted bit rate during speech pauses.
- Quantizing Distortion Units (QDU) - a unit used in the context of G.711 encoding effects.
Who uses SIST-V ETSI/EG 202 086 V2.0.0:2009?
This ETSI Guide is used by telephony network operators, service providers, and transmission planners who work on interconnection between fixed networks. Quality managers and engineering teams use it to set planning targets for loudness, codec selection, delay, echo control, synchronization, and disclosure to customers or other operators.
It is also relevant for buyers or technical specifiers procuring interconnection or telephony services where speech quality across several networks matters.
What changed in SIST-V ETSI/EG 202 086 V2.0.0:2009 from the previous edition?
The document history shows an earlier edition, V1.1.1 from February 1999, followed by V2.0.0. The history records V2.0.0 approval in 2008 and publication in July 2008.
Which standards are used with SIST-V ETSI/EG 202 086 V2.0.0:2009?
| Reference | What it contributes |
|---|---|
| ITU-T G.113, G.114 | Impairments, transcoding effects, and one-way transmission time guidance |
| ITU-T G.126, G.131, G.168 | Echo behaviour, talker echo control, and echo cancellers |
| ITU-T G.175, G.711 | Planning for network interconnection and PCM voice coding |
| ITU-T G.821, G.822, G.826 | Error performance and controlled slip objectives |
| ITU-T Q.551, Q.552 | Transmission characteristics of digital exchanges and 2-wire analogue interfaces |
| ETSI EG 201 050 | Overall transmission plan aspects for telephony in a private network |
| ETSI EN 300 462-1-1, EN 300 462-6-1 | Synchronization network terminology and primary reference clock timing |
| ISO/IEC 11573 | Synchronization methods and technical requirements for Private Integrated Services networks |
What does the SIST-V ETSI/EG 202 086 V2.0.0:2009 document contain?
The document contains a clause-based set of planning principles for interconnected telephony networks, with detailed guidance on loudness, encoding, VAD, bit integrity, delay, echo, noise, error performance and synchronization. It also explains how operators should share transmission impairment information and how evolving network technologies affect planning.
Annex A provides an informative bibliography, and the history records the publication path of the guide.
Buy Documents
ETSI EG 202 086 V2.0.0 (2008-05) - Speech Processing, Transmission and Quality Aspects (STQ); Objectives and principles for the transmission performance of multiple interconnected networks that aim to provide traditional quality telephony services
ETSI EG 202 086 V2.0.0 (2008-07) - Speech Processing, Transmission and Quality Aspects (STQ); Objectives and principles for the transmission performance of multiple interconnected networks that aim to provide traditional quality telephony services
Get Certified
Connect with accredited certification bodies for this standard
ANCE
Mexican certification and testing association.
Intertek Slovenia
Intertek testing, inspection, and certification services in Slovenia.
LNE (Laboratoire National de Métrologie et d'Essais)
French national laboratory for metrology and testing.
Sponsored listings
Frequently Asked Questions
SIST-V ETSI/EG 202 086 V2.0.0:2009 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Speech Processing, Transmission and Quality Aspects (STQ) - Objectives and principles for the transmission performance of multiple interconnected networks that aim to provide traditional quality telephony services". This standard covers: The present document specifies a simple set of objectives, principles and responsibilities for the transmission performance of multiple interconnected networks that provide "traditional quality (POTS)" circuit switched telephony services. The objectives, principles and responsibilities take account of the liberalization of telephony services and the interconnection of several separate networks, each with different topologies, in the provision of telephony connections. The present document applies to: - national and international networks; - Digital Networks and Integrated Digital Networks (i.e. networks where the only analogue component may be the local loop). The present document applies in the cases where the telephony service is: - contracted between the network operator and the customer/end user; and - contracted through a service provider. It applies where: - the caller pays for the call; - the recipient pays for the call (e.g. the 800 service); or - the cost of the call is shared by the caller and the recipient. The present document does not apply to any segment of calls where either the calling or called terminal is a mobile "terminating network".
The present document specifies a simple set of objectives, principles and responsibilities for the transmission performance of multiple interconnected networks that provide "traditional quality (POTS)" circuit switched telephony services. The objectives, principles and responsibilities take account of the liberalization of telephony services and the interconnection of several separate networks, each with different topologies, in the provision of telephony connections. The present document applies to: - national and international networks; - Digital Networks and Integrated Digital Networks (i.e. networks where the only analogue component may be the local loop). The present document applies in the cases where the telephony service is: - contracted between the network operator and the customer/end user; and - contracted through a service provider. It applies where: - the caller pays for the call; - the recipient pays for the call (e.g. the 800 service); or - the cost of the call is shared by the caller and the recipient. The present document does not apply to any segment of calls where either the calling or called terminal is a mobile "terminating network".
SIST-V ETSI/EG 202 086 V2.0.0:2009 is classified under the following ICS (International Classification for Standards) categories: 33.040.35 - Telephone networks. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST-V ETSI/EG 202 086 V2.0.0:2009 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
Final draft ETSI EG 202 086 V2.0.0 (2008-05)
ETSI Guide
Speech Processing, Transmission and Quality Aspects (STQ);
Objectives and principles for the transmission performance of
multiple interconnected networks that aim to provide
"traditional quality" telephony services
2 Final draft ETSI EG 202 086 V2.0.0 (2008-05)
Reference
REG/STQ-00126
Keywords
interworking, QoS, quality, speech, telephony,
transmission
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88
Important notice
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
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 2008.
All rights reserved.
TM TM TM TM
DECT , PLUGTESTS , UMTS , TIPHON , the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered
for the benefit of its Members.
TM
3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
ETSI
3 Final draft ETSI EG 202 086 V2.0.0 (2008-05)
Contents
Intellectual Property Rights.4
Foreword.4
1 Scope.5
2 References.5
2.1 Normative references.6
2.2 Informative references.6
3 Definitions and abbreviations.7
3.1 Definitions.7
3.2 Abbreviations.7
4 Principles.7
4.1 Responsibility.7
4.2 Technical requirements.7
4.2.1 Loudness.8
4.2.2 Encoding and Low Bit Rate Coding .8
4.2.3 Voice activity detection and speech multiplexing .8
4.2.4 Bit integrity.8
4.2.5 Absolute delay.8
4.2.6 Echo control.9
4.2.7 Noise, crosstalk and group delay distortion .9
4.2.8 Error performance.9
4.2.9 Synchronization.9
4.3 Provision of Information .9
4.4 Future developments.10
Annex A (informative): Bibliography.11
History .12
ETSI
4 Final draft ETSI EG 202 086 V2.0.0 (2008-05)
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 ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
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 ETSI 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 ETSI Guide (EG) has been produced by ETSI Technical Committee Speech Processing, Transmission and Quality
Aspects (STQ), and is now submitted for the ETSI standards Membership Approval Procedure.
ETSI
5 Final draft ETSI EG 202 086 V2.0.0 (2008-05)
1 Scope
The present document specifies a simple set of objectives, principles and responsibilities for the transmission
performance of multiple interconnected networks that provide "traditional quality (POTS)" circuit switched telephony
services.
The objectives, principles and responsibilities take account of the liberalization of telephony services and the
interconnection of several separate networks, each with different topologies, in the provision of telephony connections.
The present document applies to:
• national and international networks;
• Digital Networks and Integrated Digital Networks (i.e. networks where the only analogue component may
be the local loop).
The present document applies in the cases where the telephony service is:
• contracted between the network operator and the customer/end user; and
• contracted through a service provider.
It applies where:
• the caller pays for the call;
• the recipient pays for the call (e.g. the 800 service); or
• the cost of the call is shared by the caller and the recipient.
The present document does not apply to any segment of calls where either the calling or called terminal is a mobile
"terminating network".
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• Non-specific reference may be made only to a complete document or a part thereof and only in the
following cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the
purposes of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
For online referenced documents, information sufficient to identify and locate the source shall be provided. Preferably,
the primary source of the referenced document should be cited, in order to ensure traceability. Furthermore, the
reference should, as far as possible, remain valid for the expected life of the document. The reference shall include the
method of access to the referenced document and the full network address, with the same punctuation and use of upper
case and lower case letters.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
ETSI
6 Final draft ETSI EG 202 086 V2.0.0 (2008-05)
2.1 Normative references
The following referenced documents are indispensable for the application of the present document. For dated
references, only the edition cited applies. For non-specific references, the latest edition of the referenced document
(including any amendments) applies.
[1] ITU-T Recommendation G.113 (1996): "Transmission impairments".
[2] ITU-T Recommendation G.114 (1996): "One -way transmission time".
[3] ITU-T Recommendation G.126 (1993): "Listener echo in telephone networks".
[4] ITU-T Recommendation G.131 (1996): "Control of talker echo".
[5] ITU-T Recommendation G.168 (1997): "Digital network echo cancellers".
[6] ITU-T Recommendation G.175 (1997): "Transmission planning for private/public network
interconnection of voice traffic".
[7] ITU-T Recommendation G.711 (1988): "Pulse code modulation (PCM) of voice frequencies".
[8] ITU-T Recommendation G.821 (1996): "Error performance of an international digital connection
operating at a bit rate below the primary rate and forming part of an integrated services digital
network".
[9] ITU-T Recommendation G.822 (1988): "Controlled slip rate objectives on an international digital
connection".
[10] ITU-T Recommendation G.826 (1996): "Error performance parameters and objectives for
international, constant bit rate digital paths at or above the primary rate".
[11] ITU-T Recommendation Q.551 (1996): "Transmission characteristics of digital exchanges".
[12] ITU-T Recommendation Q.552 (1996): "Transmission characteristics at 2-wire analogue interfaces
of digital exchanges".
[13] ETSI EG 201 050: "Speech Processing, Transmission and Quality Aspects (STQ); Overall
Transmission Plan Aspects for Telephony in a Private Network".
[14] ETSI EN 300 462-1-1: "Transmission and Multiplexing (TM); Generic requirements for
synchronization networks; Part 1-1: De
...
ETSI Guide
Speech Processing, Transmission and Quality Aspects (STQ);
Objectives and principles for the transmission performance of
multiple interconnected networks that aim to provide
"traditional quality" telephony services
2 ETSI EG 202 086 V2.0.0 (2008-07)
Reference
REG/STQ-00126
Keywords
interworking, QoS, quality, speech, telephony,
transmission
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88
Important notice
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
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 2008.
All rights reserved.
TM TM TM TM
DECT , PLUGTESTS , UMTS , TIPHON , the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered
for the benefit of its Members.
TM
3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
ETSI
3 ETSI EG 202 086 V2.0.0 (2008-07)
Contents
Intellectual Property Rights.4
Foreword.4
1 Scope.5
2 References.5
2.1 Normative references.6
2.2 Informative references.6
3 Definitions and abbreviations.7
3.1 Definitions.7
3.2 Abbreviations.7
4 Principles.7
4.1 Responsibility.7
4.2 Technical requirements.7
4.2.1 Loudness.8
4.2.2 Encoding and Low Bit Rate Coding .8
4.2.3 Voice activity detection and speech multiplexing .8
4.2.4 Bit integrity.8
4.2.5 Absolute delay.8
4.2.6 Echo control.9
4.2.7 Noise, crosstalk and group delay distortion .9
4.2.8 Error performance.9
4.2.9 Synchronization.9
4.3 Provision of Information .9
4.4 Future developments.10
Annex A (informative): Bibliography.11
History .12
ETSI
4 ETSI EG 202 086 V2.0.0 (2008-07)
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 ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
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 ETSI 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 ETSI Guide (EG) has been produced by ETSI Technical Committee Speech Processing, Transmission and Quality
Aspects (STQ).
ETSI
5 ETSI EG 202 086 V2.0.0 (2008-07)
1 Scope
The present document specifies a simple set of objectives, principles and responsibilities for the transmission
performance of multiple interconnected networks that provide "traditional quality (POTS)" circuit switched telephony
services.
The objectives, principles and responsibilities take account of the liberalization of telephony services and the
interconnection of several separate networks, each with different topologies, in the provision of telephony connections.
The present document applies to:
• national and international networks;
• Digital Networks and Integrated Digital Networks (i.e. networks where the only analogue component may be
the local loop).
The present document applies in the cases where the telephony service is:
• contracted between the network operator and the customer/end user; and
• contracted through a service provider.
It applies where:
• the caller pays for the call;
• the recipient pays for the call (e.g. the 800 service); or
• the cost of the call is shared by the caller and the recipient.
The present document does not apply to any segment of calls where either the calling or called terminal is a mobile
"terminating network".
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• Non-specific reference may be made only to a complete document or a part thereof and only in the following
cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the
purposes of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
For online referenced documents, information sufficient to identify and locate the source shall be provided. Preferably,
the primary source of the referenced document should be cited, in order to ensure traceability. Furthermore, the
reference should, as far as possible, remain valid for the expected life of the document. The reference shall include the
method of access to the referenced document and the full network address, with the same punctuation and use of upper
case and lower case letters.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
ETSI
6 ETSI EG 202 086 V2.0.0 (2008-07)
2.1 Normative references
The following referenced documents are indispensable for the application of the present document. For dated
references, only the edition cited applies. For non-specific references, the latest edition of the referenced document
(including any amendments) applies.
[1] ITU-T Recommendation G.113 (1996): "Transmission impairments".
[2] ITU-T Recommendation G.114 (1996): "One -way transmission time".
[3] ITU-T Recommendation G.126 (1993): "Listener echo in telephone networks".
[4] ITU-T Recommendation G.131 (1996): "Control of talker echo".
[5] ITU-T Recommendation G.168 (1997): "Digital network echo cancellers".
[6] ITU-T Recommendation G.175 (1997): "Transmission planning for private/public network
interconnection of voice traffic".
[7] ITU-T Recommendation G.711 (1988): "Pulse code modulation (PCM) of voice frequencies".
[8] ITU-T Recommendation G.821 (1996): "Error performance of an international digital connection
operating at a bit rate below the primary rate and forming part of an integrated services digital
network".
[9] ITU-T Recommendation G.822 (1988): "Controlled slip rate objectives on an international digital
connection".
[10] ITU-T Recommendation G.826 (1996): "Error performance parameters and objectives for
international, constant bit rate digital paths at or above the primary rate".
[11] ITU-T Recommendation Q.551 (1996): "Transmission characteristics of digital exchanges".
[12] ITU-T Recommendation Q.552 (1996): "Transmission characteristics at 2-wire analogue interfaces
of digital exchanges".
[13] ETSI EG 201 050: "Speech Processing, Transmission and Quality Aspects (STQ); Overall
Transmission Plan Aspects for Telephony in a Private Network".
[14] ETSI EN 300 462-1-1: "Transmission and Multiplexing (TM); Generic requirements for
synchroniza
...
SLOVENSKI STANDARD
01-april-2009
9LGLNLREGHODYHSUHQRVDLQNDNRYRVWLJRYRUD 674 &LOMLLQQDþHODSUHQRVQLK
]PRJOMLYRVWLYHþNUDWQRPHGVHERMQRSRYH]DQLKRPUHåLMNDWHULKFLOMMH]DJRWDYOMDWL
WUDGLFLRQDOQRNDNRYRVWQHWHOHIRQVNHVWRULWYH
Speech Processing, Transmission and Quality Aspects (STQ) - Objectives and principles
for the transmission performance of multiple interconnected networks that aim to provide
traditional quality telephony services
Ta slovenski standard je istoveten z: EG 202 086 Version 2.0.0
ICS:
33.040.35 Telefonska omrežja Telephone networks
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
ETSI Guide
Speech Processing, Transmission and Quality Aspects (STQ);
Objectives and principles for the transmission performance of
multiple interconnected networks that aim to provide
"traditional quality" telephony services
2 ETSI EG 202 086 V2.0.0 (2008-07)
Reference
REG/STQ-00126
Keywords
interworking, QoS, quality, speech, telephony,
transmission
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88
Important notice
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
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 2008.
All rights reserved.
TM TM TM TM
DECT , PLUGTESTS , UMTS , TIPHON , the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered
for the benefit of its Members.
TM
3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
ETSI
3 ETSI EG 202 086 V2.0.0 (2008-07)
Contents
Intellectual Property Rights.4
Foreword.4
1 Scope.5
2 References.5
2.1 Normative references.6
2.2 Informative references.6
3 Definitions and abbreviations.7
3.1 Definitions.7
3.2 Abbreviations.7
4 Principles.7
4.1 Responsibility.7
4.2 Technical requirements.7
4.2.1 Loudness.8
4.2.2 Encoding and Low Bit Rate Coding .8
4.2.3 Voice activity detection and speech multiplexing .8
4.2.4 Bit integrity.8
4.2.5 Absolute delay.8
4.2.6 Echo control.9
4.2.7 Noise, crosstalk and group delay distortion .9
4.2.8 Error performance.9
4.2.9 Synchronization.9
4.3 Provision of Information .9
4.4 Future developments.10
Annex A (informative): Bibliography.11
History .12
ETSI
4 ETSI EG 202 086 V2.0.0 (2008-07)
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 ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
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 ETSI 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 ETSI Guide (EG) has been produced by ETSI Technical Committee Speech Processing, Transmission and Quality
Aspects (STQ).
ETSI
5 ETSI EG 202 086 V2.0.0 (2008-07)
1 Scope
The present document specifies a simple set of objectives, principles and responsibilities for the transmission
performance of multiple interconnected networks that provide "traditional quality (POTS)" circuit switched telephony
services.
The objectives, principles and responsibilities take account of the liberalization of telephony services and the
interconnection of several separate networks, each with different topologies, in the provision of telephony connections.
The present document applies to:
• national and international networks;
• Digital Networks and Integrated Digital Networks (i.e. networks where the only analogue component may be
the local loop).
The present document applies in the cases where the telephony service is:
• contracted between the network operator and the customer/end user; and
• contracted through a service provider.
It applies where:
• the caller pays for the call;
• the recipient pays for the call (e.g. the 800 service); or
• the cost of the call is shared by the caller and the recipient.
The present document does not apply to any segment of calls where either the calling or called terminal is a mobile
"terminating network".
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• Non-specific reference may be made only to a complete document or a part thereof and only in the following
cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the
purposes of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
For online referenced documents, information sufficient to identify and locate the source shall be provided. Preferably,
the primary source of the referenced document should be cited, in order to ensure traceability. Furthermore, the
reference should, as far as possible, remain valid for the expected life of the document. The reference shall include the
method of access to the referenced document and the full network address, with the same punctuation and use of upper
case and lower case letters.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
ETSI
6 ETSI EG 202 086 V2.0.0 (2008-07)
2.1 Normative references
The following referenced documents are indispensable for the application of the present document. For dated
references, only the edition cited applies. For non-specific references, the latest edition of the referenced document
(including any amendments) applies.
[1] ITU-T Recommendation G.113 (1996): "Transmission impairments".
[2] ITU-T Recommendation G.114 (1996): "One -way transmission time".
[3] ITU-T Recommendation G.126 (1993): "Listener echo in telephone networks".
[4] ITU-T Recommendation G.131 (1996): "Control of talker echo".
[5] ITU-T Recommendation G.168 (1997): "Digital network echo cancellers".
[6] ITU-T Recommendation G.175 (1997): "Transmission planning for private/public network
interconnection of voice traffic".
[7] ITU-T Recommendation G.711 (1988): "Pulse code modulation (PCM) of voice frequencies".
[8] ITU-T Recommendation G.821 (1996): "Error performance of an international digital connection
operating at a bit rate below the primary rate and forming part of an integrated services digital
network".
[9] ITU-T Recommendation G.822 (1988): "Controlled slip rate objectives on an international digital
connection".
[10] ITU-T Recommendation G.826 (1996): "Error performance parameters and objectives for
international, constant bit rate digital paths at or above the primary rate".
[11] ITU-T Recommendat
...