ETSI ETS 300 289 ed.1 (1994-01)

Business TeleCommunications (BTC); 64 kbit/s digital unrestricted leased line with octet integrity (D64U); Connection characteristics

DE/BTC-02025

Poslovne telekomunikacije (BTC) - Digitalni zakupljeni vodi za prenosno hitrost 64 kbit/s brez omejitev za prenašane signale in z ohranjanjem oktetov (D64U) – Prenosne značilnosti

General Information

• Status: Published
• Publication Date: 27-Jan-1994
• Technical Committee: BTC 2 - Subscriber Complex Installation
• Current Stage: 12 - Completion
• Due Date: 10-Feb-1994
• Completion Date: 28-Jan-1994
• Mandate: T-147-2
• Ref Project: SIST ETS 300 289:1999 - Business TeleCommunications (BTC); 64 kbit/s digital unrestricted leased line with octet integrity (D64U); Connection characteristics

Standards Content (Sample)

SLOVENSKI STANDARD
SIST ETS 300 289:1999
01-november-1999
3RVORYQHWHOHNRPXQLNDFLMH%7&'LJLWDOQL]DNXSOMHQLYRGL]DSUHQRVQRKLWURVW
NELWVEUH]RPHMLWHY]DSUHQDãDQHVLJQDOHLQ]RKUDQMDQMHPRNWHWRY'8±
3UHQRVQH]QDþLOQRVWL
Business TeleCommunications (BTC); 64 kbit/s digital unrestricted leased line with octet
integrity (D64U); Connection characteristics
Ta slovenski standard je istoveten z: ETSI ETS 300 289 ed.1 (1994-01)
ICS:
33.040.40 Podatkovna komunikacijska Data communication
omrežja networks
33.040.50 Vodi, zveze in tokokrogi Lines, connections and
circuits
SIST ETS 300 289:1999 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 289:1999

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SIST ETS 300 289:1999
EUROPEAN ETS 300 289
TELECOMMUNICATION January 1994
STANDARD
Source: ETSI TC-BTC Reference: DE/BTC-02025
ICS: 33.020, 33.040.40
ONP, leased line
Key words:
Business Telecommunications (BTC);
64 kbit/s digital unrestricted leased line
with octet integrity (D64U)
Connection characteristics
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 1994. All rights reserved.
New presentation - see History box

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ETS 300 289: January 1994
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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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 Attributes.9
5.1.1 Information transfer rate .10
5.1.2 Information transfer susceptance.10
5.1.3 Structure .11
5.1.4 Establishment of communication .11
5.1.5 Symmetry.11
5.1.6 Communication configuration.11
5.1.7 Network performance.11
5.1.7.1 Transmission delay .11
5.1.7.2 Jitter.12
5.1.7.2.1 Jitter tolerance at the network input
port. 12
5.1.7.2.2 Maximum jitter at the network output
port.13
5.1.7.3 Octet slip.13
5.1.7.4 Error.14
5.1.7.4.1 Errored seconds . 14
5.1.7.4.2 Severely errored seconds.14
Annex A (normative): Test methods .15
A.1 General .15
A.1.1 Equipment connection.15
A.1.2 Sequence of performing the tests. 15
A.2 Test methods. 15
A.2.1 Information transfer rate, susceptance, structure and symmetry .15
A.2.2 Delay .16
A.2.3 Jitter .16
A.2.4 Error and octet slip.17
Annex B (informative): Reduction of the measuring period for error .19
B.1 Introduction.19
B.2 Explanation .19
Annex C (informative): Bibliography.22
History.23

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Foreword
This European Telecommunication Standard (ETS) has been produced by the Business
TeleCommunications (BTC) Technical Committee of the European Telecommunications Standards Institute
(ETSI).
This ETS resulted from a mandate from the Commission of the European Community (CEC) to provide
harmonised standards for support of the Directive on Open Network Provision (ONP) of leased lines
(92/44/EEC).
There are two other standards directly related to this ETS:
ETS 300 288: "Business TeleCommunications (BTC); 64 kbit/s digital unrestricted leased line with
octet integrity (D64U), Network interface presentation";
ETS 300 290: "Business TeleCommunications (BTC); 64 kbit/s digital unrestricted leased line with
octet integrity (D64U), Terminal equipment interface".
This ETS 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 over 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. Under the Second Phase Directive (91/263/EEC), terminal equipment for
connection to these leased lines will be required to fulfil certain essential requirements.
CCITT Recommendation I.340 for ISDN connection types is used as a basis for the connection
characteristics.

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1 Scope
This ETS specifies the technical requirements and test principles for the connection characteristics of ONP
64 kbit/s digital unrestricted leased lines with octet integrity. The leased line provides access to the full
digital bit rate of 64 kbit/s, with network timing for both directions of the transmission, with no restrictions
on the binary content.
A connection is presented via interfaces at Network Termination Points (NTP) and includes any equipment
that may provide the NTP. Signals between terminal equipments are subject to impairments during their
transfer over the connection. The limits to these impairments are stated in this ETS, and these limits apply
only where the terminal output signals are synchronous with the output of the leased line. Together with the
companion standard, ETS 300 288 [2] defining the network interface presentation, this ETS describes the
service offered.
The tests specified in this ETS cannot be carried out, nor can the performance be monitored by the leased
line provider, while the leased line is in service, i.e. carrying users' traffic. Thus the tests are designed for
bringing into and returning into service, although there is no obligation to perform these tests each time a
leased line is brought into or returned into service.
This ETS is applicable for leased lines, including part time leased lines, for which the establishment or
release does not require any protocol exchange or other intervention at the NTP.
This ETS specifies the compliance tests for the connection requirements. This ETS does not include details
concerning the implementation of the tests, nor does it include information on any relevant regulations.
This ETS describes those characteristics of the connection that cannot be determined only by the
equipment providing the NTPs. The related standard, ETS 300 288 [2], defines the network interface
presentation and places no further constraints on the connection.
2 Normative references
This ETS 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 ETS
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.152 (1988): "Error performance measuring
equipment for 64 kbit/s paths".
[2] ETS 300 288 (1994): "Business TeleCommunications (BTC); 64 kbit/s digital
unrestricted leased line with octet integrity (D64U), Network interface
presentation".
NOTE: This ETS 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 ETS, 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).

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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.
Unavailability period: a period of time beginning at the first of 10 consecutive severely errored seconds
and ending immediately before the first following period of 10 consecutive seconds none of which are
severely errored.
1)
Errored second : a second with one or more bit errors.
1)
Severely errored second : a second where at least 0,1 % of the bits are errored.
Slip: one or more extra or missing consecutive unit intervals in the bit stream.
Octet slip: a slip of one complete octet.
)
1
Errored Seconds Ratio (ESR) : the ratio of errored seconds over all seconds within a specified
measuring period, where neither are counted during unavailability periods.
1)
Severely Errored Seconds Ratio (SESR) : the ratio of severely errored seconds over all seconds within
a specified measuring period, where neither are counted during unavailability periods.
Satellite transmission: transmission via an earth orbiting satellite.
4 Symbols and abbreviations
For the purposes of this ETS, the following abbreviations apply:
D64U 64 kbit/s digital unrestricted ONP leased line with octet integrity
ESR Errored Seconds Ratio
HRX Hypothetical Reference configuration
NTP Network Termination Point
ONP Open Network Provision
11
PRBS(2 -1) Pseudo Random Bit Sequence (as defined in § 2.1 of CCITT Recommendation
O.152 [1])
RX Receive (a signal input at either the leased line interface or the test equipment)
SESR Severely Errored Seconds Ratio
TX Transmit (a signal output at either the leased line interface or the test equipment)
UI Unit Interval
5 Requirements
The performance of the leased line shall comply with these requirements, only if the conditions of supply of
the network equipment that provides the NTP are met, (e.g. if the equipment is connected to an
appropriate power supply on the customer's premises).

)
1
These definitions are taken from CCITT Recommendation G.821.

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The CCITT attribute technique is used to express the connection requirements. The following attributes
from CCITT Recommendation I.140 are considered relevant for this ETS:
- Information transfer rate;
- Information transfer susceptance;
- Structure;
- Establishment of communication;
- Symmetry;
- Connection configuration;
- Network performance.
NOTE: "Bit rate" is equivalent to "information transfer rate" in this ETS.
The following network performance sub-attributes are considered relevant for this ETS:
- Transmission delay;
- Jitter;
- Octet slip;
- Error.
5.1 Attributes
The connection attributes are displayed in table 1. In effect, these attributes define the service being
offered.
The values and the associated compliance tests can be found in the subsequent subclauses.

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Table 1: Connection attributes
Connection type attributes Value
Description Nature Reference subclause:
Information transfer rate 64 kbit/s See 5.1.1
Information transfer susceptance Unrestricted digital See 5.1.2
Structure Octet integrity See 5.1.3
Establishment of communication Without user intervention See 5.1.4
Symmetry Symmetrical in both See 5.1.5
directions
Communication configuration Point-to-point See 5.1.6
Network performance sub-attributes
Connection type attributes Value
Description Nature Reference subclause:
Transmission delay Terrestrial and satellite See 5.1.7.1
options
Jitter Input and output ports See 5.1.7.2
Octet slip 5 per 24 hour period See 5.1.7.3
Error parameters
Time interval with errored blocks Value
Description Nature Reference subclause:
Errored seconds 5 324 per 24 hour period See 5.1.7.4.1
Severely errored seconds 105 per 24 hour period See 5.1.7.4.2
5.1.1 Information transfer rate
Requirement: The connection shall be capable of transferring information at a nominal information rate of
64 kbit/s which shall be synchronous to the network timing.
NOTE: Network timing is timing that is derived from the source or sources of timing that are
used for the whole network. Thus the timing provided by the leased line will be similar
to that provided by other digital services.
Test: The test shall be conducted according to Annex A, subclause A.2.1.
5.1.2 Information transfer susceptance
Requirement: The connection shall be capable of transferring unrestricted digital information.
Test: The test shall be conducted according to Annex A, subclause A.2.1.

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5.1.3 Structure
Requirement: The connection shall be capable of transferring the octet timing present at the input.
NOTE: When there is no input signal or octet timing is not present at the leased line distant
input or when there is a failure in the leased line connection, the octet timing at the
leased line output will not be meaningful.
Test: The test shall be conducted according to Annex A, subclause A.2.1.
5.1.4 Establishment of communication
Requirement: Establishment or release of the connection shall not require any protocol exchange or other
intervention at the NTP by the user.
Test: By declaration.
5.1.5 Symmetry
Requirement: The connection shall be symmetrical, i.e. each direction of transmission shall have the same
information transfer capability.
Test: The test shall be conducted according to Annex A, subclause A.2.1.
5.1.6 Communication configuration
Requirement: The connection configuration shall be point-to-point.
Test: By declaration.
5.1.7 Network performance
The network performance sub-attributes are displayed in table 1. The values and the associated
compliance tests can be found in the subsequent subclauses.
5.1.7.1 Transmission delay
Requirement: The requirement depends upon whether satellite transmission is involved in the connection
or not:
a) for connections where satellite transmission is not involved, the one way end-to-end delay
shall be less than (10 + 0,01 G) ms, where G is the geographical distance in kilometres, as
shown in figure 1; or
b) for connections where satellite transmission is involved, the one way end-to-end delay shall be
less than 350 ms.
NOTE 1: Requirements a) and b) are based on CCITT Recommendation G.114, § 2.2 and 2.3.

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Del ay (ms)
100
10
0
0 3 000 6 000 9 000
Geographi cal distance (km)
Figure 1: Upper limit of delay
There are no requirements for low frequency (below 20 Hz) variation of one way end-to-end delay under
this ETS.
NOTE 2: A requirement for low frequency (below 20 Hz) variation of one way end-to-end delay
may be added to this ETS when appropriate specifications become available.
Test: The test shall be conducted according to Annex A, subclause A.2.2.
5.1.7.2 Jitter
5.1.7.2.1 Jitter tolerance at the network input port
Requirement: The leased line shall function as specified with the maximum sinusoidal input jitter as shown
in table 2 and figure 2.
Table 2: Input jitter tolerance
Peak-to-peak amplitude (UI) Frequency (Hz)
A1 A2 f1 f2 f3 f4
0,25 0,05 20 600 3 000 20 000
NOTE: 0,25 UI = 3,9 μs; 0,05 UI = 0,78 μs.

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peak-to-peak jitter
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Figure 2: Limit of maximum tolerable input jitter
Test: The test shall be conducted according to Annex A, subclause A.2.3.
5.1.7.2.2 Maximum jitter at the network output port
Requirement: The maximum jitter at the output port of the network shall not exceed the limits specified in
table 3, with input jitter as specified in subclause 5.1.7.2.1, when measured with first order linear filters
with the defined cut-off frequencies.
Table 3: Maximum network output jit
...