SIST ETS 300 290 E1:2004/A1:2004

• Abstract:

  This amendment recommends to use the ISDN basic rate connector instead of the previous connector developed for primary rate ISDN which has some tolerance problems.

• Status: Published
• Publication Date: 30-Sep-2004
• ICS: 33.040.50 - Lines, connections and circuits
• Technical Committee: BTC - Business telecommunications
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Oct-2004
• Due Date: 01-Oct-2004
• Completion Date: 01-Oct-2004
• Mandate: T-147-2
• Ref Project: ETSI ETS 300 290/A1 ed.1 (1995-11) - Business TeleCommunications (BTC); 64 kbit/s digital unrestricted leased line with octet integrity (D64U); Terminal equipment interface

SIST ETS 300 290 E1:2004/A1:2004 is the Slovenian adoption of ETSI Amendment A1 to ETS 300 290 for Business TeleCommunications (BTC). It covers the 64 kbit/s digital unrestricted leased line with octet integrity (D64U) terminal equipment interface, with a focus on how the terminal equipment is connected and tested. Engineers, manufacturers, installers, and test laboratories use it to make sure D64U terminal equipment can be connected in the specified way.

What does SIST ETS 300 290 E1:2004/A1:2004 specify?

SIST ETS 300 290 E1:2004/A1:2004 specifies an amendment to the D64U terminal equipment interface standard. Its main purpose is to recommend use of the ISDN basic rate connector instead of the earlier connector developed for primary rate ISDN, which had tolerance problems.

The amendment keeps the original subject of the base standard but updates the physical connection arrangement, allows alternative connection schemes, and adjusts the way tests are carried out. It is organized as changes to clause 2, subclause 5.1, subclause 5.2.1.3, and Annex A.1.2.

What are the key requirements of SIST ETS 300 290 E1:2004/A1:2004?

• Clause 5.1, Physical characteristics limits the specified connection to solid conductors in the 0,4 to 0,6 mm range. In practice, the terminal equipment must be able to present either a point for attaching unterminated solid conductors or the solid conductors themselves, so the interface can actually be wired up for use.

• Clause 5.1.1, Hardwired connection requires the terminal equipment to provide connection contacts, such as an insulation displacement connector or a screw terminal block, or a wiring arrangement with unterminated solid wire conductors at the far end. There is no separate test for the hardwired connection itself, because the later tests are performed through that connection.

• Clause 5.1.2, Alternative means of connection allows additional connection methods alongside the hardwired arrangement. This matters because manufacturers can supply connectors or other schemes if they still support the required solid-conductor interface.

• Clause 5.1, Figure 1 defines the transmit pair as the output from the terminal equipment interface and the receive pair as the input to the terminal equipment interface. In practice, this fixes the wiring direction so installers and test labs connect the correct pair to the correct side.

• Clause 5.1, Note 2 points out that a shielded cord or cable may be needed to meet radiation and immunity requirements defined by Electro-Magnetic Compatibility (EMC) standards. That matters when the installation must also pass EMC checks, not just basic connectivity.

• Clause 5.2.1.3, item b) adds a note that additional sources of timing, such as an internal clock, are not ruled out. This gives equipment designers room to include more than one timing source while still meeting the interface requirement.

• Annex A.1.2 changes the test setup so the tests in this ETS are carried out using the connection method suitable for unterminated solid conductors defined in subclause 5.1.1. For compliance work, this means labs do not test through the old normal plug and cord arrangement.

What terms does SIST ETS 300 290 E1:2004/A1:2004 define?

• Business TeleCommunications (BTC) - the ETSI technical area under which this leased-line interface standard was produced.
• 64 kbit/s digital unrestricted leased line with octet integrity (D64U) - the service and interface covered by the standard.
• Terminal equipment (TE) - the equipment that connects to the line at the terminal equipment interface.
• Transmit pair (TX) - the output pair from the terminal equipment interface.
• Receive pair (RX) - the input pair to the terminal equipment interface.
• Electro-Magnetic Compatibility (EMC) - the set of radiation and immunity requirements that can drive cable and shielding choices.

Who uses SIST ETS 300 290 E1:2004/A1:2004?

Terminal equipment designers use this amendment when they choose the physical connection method for D64U equipment. Manufacturers use it to build the interface so it can accept solid conductors or approved alternative connection schemes.

Test laboratories use it because Annex A.1.2 tells them how to carry out the tests. Installers and service technicians use it to wire the transmit and receive pairs correctly. Quality managers and buyers use it to check that supplied equipment matches the required connection approach before acceptance.

What changed in SIST ETS 300 290 E1:2004/A1:2004 from the previous edition?

This amendment changes ETS 300 290 (1994). It replaces the earlier connector approach tied to ISO/IEC 10173 (1991) with a connection method based on solid conductors, while still allowing other connection schemes such as connectors.

It also adds the note that additional timing sources are allowed, updates Annex A.1.2 so tests are performed using the connection method for unterminated solid conductors, and deletes reference [6].

Which standards are used with SIST ETS 300 290 E1:2004/A1:2004?

SIST ETS 300 290 E1:2004/A1:2004 is used together with ETS 300 290 (1994), because this document is an amendment to that edition.

The text also refers to ISO/IEC 10173 (1991) in connection with the previously specified connector type. That reference is important to understanding why the amendment changes the physical connector arrangement.

What does the SIST ETS 300 290 E1:2004/A1:2004 document contain?

The document contains a short foreword, the amendment instructions, and the revised wording for the affected clauses and Annex A. It includes the updated physical connection requirements, the note on additional timing sources, and the revised test arrangement for Annex A.1.2.

It also contains Figure 1, which shows the transmit and receive direction at the terminal equipment interface. The notes explain practical points such as the possible need for shielded cable and the possibility of alternative connection schemes.

ETS 300 290
AMENDMENT A1
November 1995
Source: ETSI TC-BTC Reference: RE/BTC-02064
ICS: 33.120
ONP, leased line
Key words:
This amendment A1 modifies
the European Telecommunication Standard ETS 300 290 (1994)
Business TeleCommunications (BTC);
64 kbit/s digital unrestricted leased line
with octet integrity (D64U);
Terminal equipment interface
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 1995. All rights reserved.
New presentation - see History box

Page 2
ETS 300 290: January 1994/A1: November 1995
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 300 290: January 1994/A1: November 1995
Foreword
This amendment to ETS 300 290 (1994) has been produced by the Business TeleCommunications (BTC)
Technical Committee of the European Telecommunications Standards Institute (ETSI).
This amendment changes ETS 300 290 (1994) as described below:
The connector type specified, conforming to ISO/IEC 10173 (1991), cannot be manufactured. Since a
standardized connector is not available, the terminal equipment is required to provide either a point for
connection of solid conductors, or solid conductors themselves. In order to allow connection to be made
using other methods, the TE is permitted to be supplied with other connection schemes (e.g. connectors).
A note is added to subclause 5.2.1.3 on output timing stating that additional sources of timing are allowed.
Transposition dates
Date of adoption of this amendment: 31 October 1995
Date of latest announcement of this amendment (doa): 31 January 1996
Date of latest publication or endorsement of this amendment (dop/e): 31 July 1996
Date of withdrawal of any conflicting National Standard (dow): 31 July 1996

Page 4
ETS 300 290: January 1994/A1: November 1995
Amendments
Page 7, amendment to clause 2
Delete reference [6].
Page 9, amendment to subclause 5.1
Replace subclause 5.1 with subclauses 5.1, 5.1.1 and 5.1.2 as given below:
"5.1 Physical characteristics
Currently no standardized connector is readily available. Consequently, the only method of connection that
can be specified in this ETS is the use of solid conductors of 0,4 to 0,6 mm. This ETS requires the TE to
be capable of presenting either a point for the attachment of unterminated solid conductors, or solid
conductors themselves (see subclause 5.1.1). It is a requirement that such a connection method be
available to be provided for use with the TE if necessary.
In order to allow connection to be made using other methods (e.g. connectors), the TE is permitted to be
supplied with a connection method suitable for use with those methods (see subclause 5.1.2).
NOTE 1: The following are examples of arrangements that comply with the requirements. The
list below should not be regarded as an exhaustive lis
...

SLOVENSKI STANDARD
01-oktober-2004
Poslovne telekomunikacije (BTC) - Digitalni zakupljeni vodi za prenosno hitrost 64
kbit/s brez omejitev za prenašane signale in z ohranjanjem oktetov (D64U) -
Vmesnik terminalske opreme
Business TeleCommunications (BTC); 64 kbit/s digital unrestricted leased line with octet
integrity (D64U); Terminal equipment interface
Ta slovenski standard je istoveten z: ETS 300 290/A1 Edition 1
ICS:
33.040.50 Vodi, zveze in tokokrogi Lines, connections and
circuits
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

ETS 300 290
AMENDMENT A1
November 1995
Source: ETSI TC-BTC Reference: RE/BTC-02064
ICS: 33.120
ONP, leased line
Key words:
This amendment A1 modifies
the European Telecommunication Standard ETS 300 290 (1994)
Business TeleCommunications (BTC);
64 kbit/s digital unrestricted leased line
with octet integrity (D64U);
Terminal equipment interface
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 1995. All rights reserved.
New presentation - see History box

Page 2
ETS 300 290: January 1994/A1: November 1995
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 300 290: January 1994/A1: November 1995
Foreword
This amendment to ETS 300 290 (1994) has been produced by the Business TeleCommunications (BTC)
Technical Committee of the European Telecommunications Standards Institute (ETSI).
This amendment changes ETS 300 290 (1994) as described below:
The connector type specified, conforming to ISO/IEC 10173 (1991), cannot be manufactured. Since a
standardized connector is not available, the terminal equipment is required to provide either a point for
connection of solid conductors, or solid conductors themselves. In order to allow connection to be made
using other methods, the TE is permitted to be supplied with other connection schemes (e.g. connectors).
A note is added to subclause 5.2.1.3 on output timing stating that additional sources of timing are allowed.
Transposition dates
Date of adoption of this amendment: 31 October 1995
Date of latest announcement of this amendment (doa): 31 January 1996
Date of latest publication or endorsement of this amendment (dop/e): 31 July 1996
Date of withdrawal of any conflicting National Standard (dow): 31 July 1996

Page 4
ETS 300 290: January 1994/A1: November 1995
Amendments
Page 7, amendment to clause 2
Delete reference [6].
Page 9, amendment to subclause 5.1
Replace subclause 5.1 with subclauses 5.1, 5.1.1 and 5.1.2 as given below:
"5.1 Physical characteristics
Currently no standardized connector is readily available. Consequently, the only method of connection that
can be specified in this ETS is the use of solid conductors of 0,4 to 0,6 mm. This ETS requires the TE to
be capable of presenting either a point for the attachment of unterminated solid conductors, or solid
conductors themselves (see subclause 5.1.1). It is a
...