Business Telecommunications (BT); Open Network Provision (ONP) technical requirements; 2 048 kbit/s digital unstructured leased line (D2048U) Attachment requirements for terminal equipment interface

Specification of the attachment requirements for a terminal equipment interface and test procedures for compliance.

Poslovne telekomunikacije (BTC) - Tehnične zahteve za zagotavljanje odprtosti omrežij - Digitalni zakupljeni vodi za prenosno hitrost 2 048 kbit/s in za nestrukturirane signale (D2048U) - Priključitvene zahteve za vmesnik terminalske opreme

General Information

Status
Published
Publication Date
30-Sep-2004
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Oct-2004
Due Date
01-Oct-2004
Completion Date
01-Oct-2004
Mandate

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SIST TBR 012 E1:2004
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SLOVENSKI STANDARD
SIST TBR 012 E1:2004
01-oktober-2004
3RVORYQHWHOHNRPXQLNDFLMH %7& 7HKQLþQH]DKWHYH]D]DJRWDYOMDQMHRGSUWRVWL
RPUHåLM'LJLWDOQL]DNXSOMHQLYRGL]DSUHQRVQRKLWURVWNELWVLQ]D
QHVWUXNWXULUDQHVLJQDOH '8 3ULNOMXþLWYHQH]DKWHYH]DYPHVQLNWHUPLQDOVNH
RSUHPH
Business Telecommunications (BT); Open Network Provision (ONP) technical
requirements; 2 048 kbit/s digital unstructured leased line (D2048U) Attachment
requirements for terminal equipment interface
Ta slovenski standard je istoveten z: TBR 012 Edition 1
ICS:
33.040.50 Vodi, zveze in tokokrogi Lines, connections and
circuits
SIST TBR 012 E1:2004 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST TBR 012 E1:2004
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SIST TBR 012 E1:2004
TECHNICAL TBR 12
BASIS for December 1993
REGULATION
Source: ETSI TC-BT Reference: DTBR/BT-02036
ICS: 33.040.40
ONP, leased lines, D2048U
Key words:
Business Telecommunications (BT);
Open Network Provision (ONP) technical requirements;
2 048 kbit/s digital unstructured leased line (D2048U)
Attchment requirements for terminal equipment
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 - secretariat@etsi.fr
X.400: Internet:
Tel.: +33 92 94 42 00 - Fax: +33 93 65 47 16

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
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TBR 012: December 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 Standards Approval Dept." at the address shown on the title page.

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TBR 012: December 1993
Contents

Foreword...........................................................................................................................................5

Introduction ........................................................................................................................................5

1 Scope ......................................................................................................................................7

2 Normative references ................................................................................................................7

3 Definitions................................................................................................................................. 7

4 Symbols and abbreviations.........................................................................................................8

5 Requirements............................................................................................................................8

5.1 Physical characteristics ...............................................................................................8

5.2 Electrical characteristics ..............................................................................................9

5.2.1 Output port.............................................................................................. 9

5.2.1.1 Signal coding....................................................................9

5.2.1.2 Waveform shape ..............................................................9

5.2.1.3 Clock accuracy............................................................... 10

5.2.1.4 Output jitter.................................................................... 11

5.2.2 Input port............................................................................................... 12

5.3 Safety...................................................................................................................... 12

5.4 Overvoltage protection .............................................................................................. 12

5.4.1 Impulse transfer from mains, common mode ............................................ 12

5.4.2 Impulse transfer from mains, transverse mode ......................................... 12

5.4.3 Conversion of common mode to transverse mode..................................... 12

5.5 Electro-magnetic compatibility.................................................................................... 13

Annex A (normative): Test methods ............................................................................................. 14

A.1 General .................................................................................................................................. 14

A.1.1 Equipment connection................................................................................................ 14

A.1.2 Test environment....................................................................................................... 14

A.2 Test methods.......................................................................................................................... 15

A.2.1 Signal coding at output port........................................................................................ 15

A.2.2 Waveform shape at output port .................................................................................. 15

A.2.3 Clock accuracy at the output port............................................................................... 16

A.2.4 Jitter ........................................................................................................................ 17

Annex B (normative): Definition of HDB3 code............................................................................... 19

B.1 General .................................................................................................................................. 19

B.2 Definition ................................................................................................................................19

Annex C (informative): Bibliography................................................................................................ 20

History............................................................................................................................................. 21

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TBR 012: December 1993
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TBR 012: December 1993
Foreword

This Technical Basis for Regulation (TBR) has been produced by the Business Telecommunications (BT)

Technical Committee of the European Telecommunications Standards Institute (ETSI) and was adopted

after having passed through the ETSI standards approval procedure.

This TBR results from a mandate from the Commission of the European Community (CEC) to provide

harmonised standards for the support of the Second Phase Directive (91/263/EEC).

This TBR is based on information from CCITT Recommendations and ETSI publications and the relevant

documents are quoted where appropriate.
Introduction

The Council Directive on the application of Open Network Provision (ONP) to leased lines (92/44/EEC),

concerns the harmonisation of conditions for open and efficient access to, and use of, the leased lines

provided on public telecommunications networks and the availability throughout the Community (EEC) of a

minimum set of leased lines with harmonised technical characteristics.

The consequence of the Directive is that Telecommunications Organisations within the EEC shall make

available a set of leased lines between points in these countries with specified connection characteristics

and specified interfaces.

Two classes of standard will be used for the interfaces of terminal equipment designed for connection to

the ONP leased lines. European Telecommunications Standards (ETSs), which are voluntary, give the full

technical specifications for these interfaces, whereas Technical Basis for Regulations (TBRs) give the

essential requirements under the Second Phase Directive (91/263/EEC) for attachment to the leased lines.

This TBR is a subset of the corresponding ETS 300 248 (1993).

CCITT Recommendation G.703 (1991), as qualified by ETS 300 166 (1993), is used as the basis for the

terminal interface.
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TBR 012: December 1993
1 Scope

This TBR specifies the attachment requirements and corresponding test principles for a terminal equipment

interface for connection to the network termination points of ONP 2 048 kbit/s digital unstructured leased

lines using 120 ohm interfaces.

The term "attachment requirements" in the context of this TBR describes the essential requirements for

access which have to be fulfilled under the Second Phase Directive (91/263/EEC). Conformance to these

requirements does not guarantee end-to-end interoperability.

This TBR is applicable to all interfaces designed for connection to the ONP 2 048 kbit/s unstructured

leased line. It covers the essential requirements for the physical and electrical characteristics of the

terminal equipment interface.

Customer premises wiring and installation between the terminal equipment and the Network Termination

Point (NTP) are outside the scope of this TBR.
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 O.151 (1988), § 2.1: "Error performance measuring
equipment for digital systems at the primary rate and above".
[2] ETS 300 046-3 (1992): "Integrated Services Digital Network (ISDN); Primary
rate access - safety and protection, Part 3: Interface I - protection".
[3] ISO/IEC 10173 (1991): "Information technology - Integrated Services Digital
Network (ISDN) primary access connector at reference points S and T".

NOTE: This TBR also contains a number of informative references which have been included to

indicate the sources from which various material has been derived, hence they do not

have an associated normative reference number. Details of these publications are given

in Annex C. In some cases the same publication may have been referenced in both a

normative and an informative manner.
3 Definitions
For the purposes of this TBR, the following definitions apply:

Leased lines: the telecommunications facilities provided by a public telecommunications network that

provide defined transmission characteristics between network termination points and that do not include

switching functions that the user can control, (e.g. on-demand switching).

Network Termination Point (NTP): all physical connections and their technical access specifications

which form part of the public telecommunications network and are necessary for access to, and efficient

communication through, that public network.

Safety Extra-Low Voltage (SELV) circuit: a secondary circuit which is so designed and protected that

under normal and single fault conditions the voltage between any two accessible parts, or between one

accessible part and the equipment protective earthing terminal for a class I equipment, does not exceed a

safe value (subclause 1.2.8.5 of EN 60950).

Terminal Equipment (TE): equipment intended to be connected to the public telecommunications network,

i.e.:
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TBR 012: December 1993

a) to be connected directly to the termination of a public telecommunication network; or

b) to interwork with a public telecommunications network being connected directly or

indirectly to the termination of a public telecommunications network,
in order to send, process, or receive information.
4 Symbols and abbreviations
For the purposes of this TBR, the following abbreviations apply:
AC Alternating Current
D2048U 2 048 kbit/s digital unstructured ONP leased line
DC Direct Current
EMC Electro-Magnetic Compatibility
HDB3 High Density Bipolar code of order 3 (see Annex B)
ONP Open Network Provision

PRBS(2 -1) Pseudo Random Bit Sequence (as defined in § 2.1 of CCITT Recommendation

O.151 [1])

RX Receive (a signal input at either the terminal equipment interface or the test

equipment)

TX Transmit (a signal output at either the terminal equipment interface or the test

equipment)
UI Unit Interval
5 Requirements

The 2 048 kbit/s unstructured leased line provides a bidirectional point-to-point digital leased line with a

usable bit rate of 2 048 kbit/s where timing is not provided from the network. The provision of circuit timing

is the responsibility of the user. No structuring of the data is provided by the network and any structuring is

the responsibility of the user.
5.1 Physical characteristics

Requirement: The terminal equipment shall provide an 8-contact plug of the type specified in

ISO/IEC 10173 [3] with contact assignments as specified in table 1. In addition, the terminal equipment

may provide an alternative method of connection.

NOTE 1: The use of a shielded cord or cable may be necessary to meet radiation and immunity

requirements defined in Electro-Magnetic Compatibility (EMC) standards.

NOTE 2: The alternative connection method is primarily for the purpose of permitting hardwired

presentations of the leased line using insulation displacement terminals and wire with

solid conductors having diameters in the range 0,4 to 0,6 mm.

Test: There shall be a visual inspection that the plug is of the correct type. The contact assignments are

tested indirectly through the tests in Annex A.
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TBR 012: December 1993
Table 1: Contact assignment
Contact Terminal interface
1 & 2 Receive pair
3 Shield reference point
4 & 5 Transmit pair
6 Shield reference point
7 Unused
8 Unused

NOTE 1: The transmit pair is the output from the terminal equipment interface. The receive pair is the

input to the terminal equipment interface, as shown in figure 1. Where the terms "output" and

"input" are used without qualification in this standard, they refer to the terminal equipment

interface.

NOTE 2: For connection of the shield, or shields, to the common reference point at the NTP contacts 3

and 6 shall be used.
�˝˝˝˝˝˝˝˝˝˝˝˝» OUTPUT INPUT �˝˝˝˝˝˝˝˝˝˝˝˝»
” TX ˙˜˜˜˜˜˜˜˜˜˜˜˜˜>˜˜˜˜˜˜˜˜˜˜˜˜˜˜¶ RX ”
” NETWORK ˙˜˜˜˜˜˜˜˜˜˜˜˜˜>˜˜˜˜˜˜˜˜˜˜˜˜˜˜¶ TERMINAL ”
” INTERFACE ” ” EQUIPMENT ”
” ˙˜˜˜˜˜˜˜˜˜˜˜˜˜<˜˜˜˜˜˜˜˜˜˜˜˜˜˜¶ ”
” RX ˙˜˜˜˜˜˜˜˜˜˜˜˜˜<˜˜˜˜˜˜˜˜˜˜˜˜˜˜¶ TX ”
¨˝˝˝˝˝˝˝˝˝˝˝˝… INPUT OUTPUT ¨˝˝˝˝˝˝˝˝˝˝˝˝…
Figure 1
5.2 Electrical characteristics
5.2.1 Output port
5.2.1.1 Signal coding

Requirement: Coding of the digital signal transmitted at the output port shall be in accordance with High

Density Bipolar code of order 3 (HDB3) encoding rules (see Annex B).
Test: The test shall be conducted according to Annex A, subclause A.2.1.
5.2.1.2 Waveform shape

Requirement: The pulse at the output port shall comply with the requirements given in table 2 and figure 2,

based on CCITT Recommendation G.703.
Test: The test shall be conducted according to Annex A, subclause A.2.2.
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TBR 012: December 1993
Table 2: Waveform shape at output port
Pulse shape All marks of a valid signal must conform
(nominally rectangular) with the mask (see figure 2) irrespective
of the polarity. The value V corresponds
to the nominal peak voltage of a mark.
Test load impedance 120 ohms non-reactive
Nominal peak voltage V of a mark 3 volts
Peak voltage of a space 0 ± 0,3 volts
Nominal pulse width 244 ns
Ratio of the amplitudes of positive and negative 0,95 to 1,05
pulses at the centre of the pulse interval
Ratio of the widths of positive and negative 0,95 to 1,05
pulses at the nominal half amplitude
269 ns
(244 + 25)
20%
10%
194 ns
V=100%
10%
(244 - 50)
20%
Nominal pulse
50%
244 ns
219 ns
10%
10%
(244 - 25)
10%
10%
20%
488 ns
(244 + 244)
Figure 2: Pulse mask for 2 048 kbit/s pulse
5.2.1.3 Clock accuracy

Requirement: Where a Terminal Equipment (TE) has an internal clock, in the absence of any external

reference signal timing, the output port shall have a bit rate of 2 048 kbit/s ± 50 ppm.

Test: The test shall be conducted according to Annex A, subclause A.2.3.
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TBR 012: December 1993
5.2.1.4 Output jitter

Requirement: The peak-to-peak output jitter shall not exceed the limits of table 3 when measured with

first order linear filters with the defined cut-off frequencies. For the purpose of testing, any signal input

from which the output timing is derived shall be provided with the maximum tolerable input jitter, and with

the maximum tolerable input frequency deviation, as specified by the manufacturer.

Where the output timing of the terminal equipment is taken from the leased line, the input to the terminal

equipment shall be provided with components of sinusoidal jitter at points on the curve of figure 3 and

table 4.

NOTE: A separate requirement for output jitter at frequencies in the range 4 Hz to 40 Hz is not

required because this frequency band is covered sufficiently by the first order linear

filter which produces 20 dB attenuation at 4 H
...

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