SIST ETS 300 084 E1:2003

• Abstract:

  Characteristics and related tests to ensure end-to-end compatibility for bearer service, ISDN

• Status: Published
• Publication Date: 30-Nov-2003
• ICS: 33.080 - Integrated Services Digital Network (ISDN)
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-2003
• Due Date: 01-Dec-2003
• Completion Date: 01-Dec-2003
• Ref Project: ETSI ETS 300 084 ed.1 (1993-03) - Integrated Services Digital Network (ISDN); Circuit mode structured bearer service category usable for 3,1 kHz audio information transfer; Terminal requirements necessary for end-to-end compatibility

SIST ETS 300 084 E1:2003 is the Slovenian adoption of ETS 300 084 Edition 1 from ETSI. It specifies terminal requirements for the ISDN circuit-mode structured bearer service usable for 3,1 kHz audio information transfer, so terminals can interwork end to end on the pan-European ISDN. The document covers signalling, B-channel behaviour and the test methods used to check conformance.

What does SIST ETS 300 084 E1:2003 specify?

SIST ETS 300 084 E1:2003 specifies the requirements a terminal shall meet to work with the circuit-mode 64 kbit/s 8 kHz structured bearer service used for 3,1 kHz audio. The requirements are additional to the ISDN basic access interface and ISDN primary rate interface attachment requirements, so they sit on top of the normal terminal-to-network rules.

The document is organised into a short set of clauses and two annexes.

Part	What it covers
Annex A	Normative test methods for conformance checks
Annex B	Informative bibliography

Clause 1 gives the scope, Clause 2 lists normative references, Clause 3 and 4 give definitions and abbreviations, Clause 5 covers D-channel characteristics, and Clause 6 covers B-channel characteristics.

What are the key requirements of SIST ETS 300 084 E1:2003?

SIST ETS 300 084 E1:2003 focuses on how a terminal signals the 3,1 kHz audio bearer service and how it handles the audio path on the B-channel. In practice, this is what makes a call set up as the right ISDN service and keeps the signal level and echo control within the expected limits.

Signalling on the D-channel

Clause 5 requires the Bearer Capability (BC) information element in the SETUP message to be coded for the 3,1 kHz audio bearer service. For outgoing calls, the terminal sends that coding; for incoming calls, the network message is treated as a request for this bearer service when the same coding is present.

This matters because the far end and the network must recognise the call type before the audio path is established.

Optional compatibility information

Clause 5 notes that High Layer Compatibility (HLC) and Low Layer Compatibility (LLC) information elements may be used. The bibliography points to ETR 018 and ETS 300 102-1 for how those elements are applied and checked.

In practice, this gives terminals extra compatibility information when it is available, which can help call handling across different ISDN services.

B-channel level and encoding

Clause 6 sets the digital interface reference point at 0 dBr and requires A-law encoding at 64 kbit/s. This is the audio coding expected on the bearer path.

For a buyer or integrator, this means the terminal has to present the audio stream in the defined digital format, not just any voiceband signal.

Echo control disabling

Clause 6 requires echo control equipment to be disabled when needed, for example for voiceband data communication. The document uses a 2 100 Hz tone and a tone reversal method to disable echo suppressors and echo cancellers.

This matters because echo control can interfere with modem-like signals, so terminals need a controlled way to turn it off.

Speech-band power limits

Clause 6 limits the average active power level of speech signals below 4 kHz over 10 seconds, and it separately limits the average power level of data or code excitation over 60 seconds. Annex A gives the measurement methods for both cases.

In practice, this keeps the terminal from sending too much energy into the line, which helps interworking and avoids overdriving the bearer path.

What terms does SIST ETS 300 084 E1:2003 define?

• Bearer Capability (BC) - The D-channel information element that identifies the bearer service requested in SETUP.
• D-channel - The signalling channel used to carry call setup information such as BC, HLC and LLC.
• B-channel - The bearer channel that carries the 64 kbit/s audio or speech signal.
• High Layer Compatibility (HLC) - An optional information element used to describe higher-layer compatibility for the call.
• Low Layer Compatibility (LLC) - An optional information element used to support lower-layer compatibility checking.
• Echo suppressor - A form of echo control equipment that may need to be disabled for voiceband data.
• Echo canceller - Another form of echo control equipment covered by the disabling procedure.

Who uses SIST ETS 300 084 E1:2003?

SIST ETS 300 084 E1:2003 is used by ISDN terminal manufacturers, telecom engineers, test laboratories, and quality teams that need terminal-to-network compatibility for 3,1 kHz audio bearer service. It is also relevant to buyers and integrators choosing terminal equipment for pan-European ISDN connections, especially where call setup signalling and voiceband behaviour must match the service description.

What changed in SIST ETS 300 084 E1:2003 from the previous edition?

SIST ETS 300 084 E1:2003 is identified as ETS 300 084 Edition 1, first issued in March 1993.

Which standards are used with SIST ETS 300 084 E1:2003?

Clause 2 names the standards and recommendations that support this ETS:

• ETS 300 085 - Gives test equipment and measurement approach for power-level testing.
• ETS 300 104 - Provides the layer 3 attachment test procedures used to check BC coding for outgoing and incoming calls.
• ETS 300 110 - Gives the service description for the 64 kbit/s 8 kHz structured bearer service.
• ETS 300 153 - Covers ISDN basic access attachment requirements and laboratory environmental conditions.
• CCITT Recommendation G.101 - Defines the transmission plan and the 0 dBr reference.
• CCITT Recommendation G.701 - Supplies digital transmission and PCM vocabulary.
• CCITT Recommendation G.711 - Defines A-law PCM coding.
• CCITT Recommendation G.164 / G.165 - Cover echo suppressors and echo cancellers.
• CCITT Recommendation I.112 / I.230 - Provide ISDN vocabulary and bearer service category definitions.
• CCITT Recommendation P.56 - Gives the speech level measurement method used in Annex A.
• CCITT Recommendation V.25 - Gives the echo control disabling procedure.

The bibliography also points to ETR 018, ETS 300 082, ETS 300 012 and ETS 300 102-1 for related ISDN compatibility and interface topics.

What does the SIST ETS 300 084 E1:2003 document contain?

SIST ETS 300 084 E1:2003 includes a BC coding figure for outgoing and incoming call setup, plus test procedures in Annex A for equipment, echo control disabling and speech-band signal level checks. Annex A describes how to measure output level, what test conditions to use and which reference methods apply.

For testing and certification work, this means the document is not only a service description but also a practical conformance guide for terminal behaviour on the D-channel and B-channel.

SLOVENSKI STANDARD
01-december-2003
Digitalno omrežje z integriranimi storitvami (ISDN) – Vodovna storitvena kategorija
za strukturiranega nosilca, uporabnega za prenos zvokovne informacije na 3,1 kHz
– Terminalske zahteve, potrebne za združljivost pri izvedbi konec-konec
Integrated Services Digital Network (ISDN); Circuit mode structured bearer service
category usable for 3,1 kHz audio information transfer; Terminal requirements necessary
for end-to-end compatibility
Ta slovenski standard je istoveten z: ETS 300 084 Edition 1
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.

EUROPEAN ETS 300 084
TELECOMMUNICATION March 1993
STANDARD
Source: ETSI TC-TE Reference: T/TE 12-08
ICS: 33.080
ISDN, structured bearer service category, 3,1 kHz audio information transfer, end-to-end
Key words:
compatibility
Integrated Services Digital Network (ISDN);
Circuit mode structured bearer service category usable for
3,1 kHz audio information transfer
Terminal requirements necessary for end-to-end compatibility
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 1993. All rights reserved.
New presentation - see History box

Page 2
ETS 300 084: March 1993
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 Committee Support Dept." at the address shown on the title page.

Page 3
ETS 300 084: March 1993
Contents
Foreword.5
1 Scope .7
2 Normative references .7
3 Definitions.8
4 Symbols and abbreviations.8
5 D-channel characteristics.8
5.1 Outgoing call.8
5.2 Incoming call.8
6 B-channel characteristics .9
6.1 Relative level .9
6.2 Encoding .9
6.3 Disabling of echo control equipment.9
6.4 Speech band power level of signal from the terminal.9
6.4.1 Speech signals.9
6.4.2 Data or code signals.9
Annex A (normative): Test methods . 10
A.1 Test equipment .10
A.2 Disabling of echo control devices.10
A.3 Speech band signal level.10
A.3.1 Speech signals.10
A.3.2 Data or code signals . 10
Annex B (informative): Bibliography.10
History.11

Page 4
ETS 300 084: March 1993
Blank page
Page 5
ETS 300 084: March 1993
Foreword
This European Telecommunication Standard (ETS) has been produced by the Terminal Equipment (TE)
Technical Committee of the European Telecommunications Standards Institute (ETSI).

Page 6
ETS 300 084: March 1993
Blank page
Page 7
ETS 300 084: March 1993
1 Scope
This European Telecommunication Standard (ETS) specifies the requirements for a terminal to interwork
with the circuit-mode 64 kbit/s 8 kHz structured bearer service with a category usable for 3,1 kHz audio
information transfer when connected by the pan-European Integrated Services Digital Network (ISDN).
The requirements of this ETS are additional to those of the ETSs for connection to the ISDN basic access
interface or ISDN primary rate interface.
Annex A to this ETS specifies the method of testing required to verify conformance to this ETS as defined
in ETS 300 110 [3].
NOTE: The characteristics of the ISDN User-Network Interface are specified in ETS 300 012
and ETS 300 104 [2] and the attachment requirements are specified in ETS 300 153
[4] (see Clause 2).
2 Normative references
This ETS incorporates by dated or undated reference, provision 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 referenced to applies.
[1] ETS 300 085 (1990): "Integrated Services Digital Network (ISDN); 3,1 kHz
telephony teleservice Attachment requirements for handset terminals (Candidate
NET 33)".
[2]
...