ETSI ETS 300 001 ed.2 (1994-12)

SLOVENSKI STANDARD
01-december-2003
3ULNOMXþLWYHQDMDYQRNRPXWLUDQRWHOHIRQVNRRPUHåMH36716SORãQHWHKQLþQH
]DKWHYH]DRSUHPRSULNOMXþHQRQDDQDORJQLQDURþQLãNLYPHVQLNYRPUHåMX3671
SRJODYMH6SORãQR
Attachments to the Public Switched Telephone Network (PSTN); General technical
requirements for equipment connected to an analogue subscriber interface in the PSTN
Ta slovenski standard je istoveten z: ETS 300 001 Edition 2
ICS:
33.040.35 Telefonska omrežja Telephone networks
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN ETS 300 001
TELECOMMUNICATION December 1994
STANDARD Second Edition
Source: ETSI TC-TE Reference: RE/TE 04-16
ICS: 33.040.20
PSTN, Access, TE, General
Key words:
Attachments to the Public Switched Telephone Network (PSTN);
General technical requirements for equipment connected to an
analogue subscriber interface in the PSTN
Chapter 1: General
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 1994. All rights reserved.
New presentation - see History box

Page 2
ETS 300 001 - Chapter 1 : December 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.

Page 3
ETS 300 001 - Chapter 1 : December 1994
Contents
Foreword .5
1 General.7
1.1 Introduction .7
1.1.1 Foreword .7
1.1.2 NETs .7
1.1.3 Types of NET .8
1.1.4 NET 4 .8
1.2 Scope.9
1.3 Method of use .11
1.3.1 Structure of the ETS.11
1.3.2 Use of requirements and tests .11
1.4 Definitions of terms used in this ETS.11
1.4.1 Local subscriber line (analogue) .11
1.4.2 Public Switched Telephone Network (PSTN).11
1.4.3 PSTN connection point.12
1.4.4 Terminal equipment .12
1.4.4.1 General definitions.12
1.4.4.2 Types of TE .14
1.4.4.3 Reference model of a TE.16
1.4.4.4 Testing point .16
1.4.5 States or conditions of TE .18
1.4.5.1 Quiescent or idle state or condition .18
1.4.5.2 Ringing state or condition .19
1.4.5.3 Loop state or condition .19
1.4.5.4 Dialling or signalling state or condition .19
1.4.5.5 Register recall state or condition .19
1.4.6 Line terminals.19
1.4.7 Speech band .19
1.5 DC feeding arrangements.20
1.5.1 Requirement values for feeding conditions .21
1.5.2 Test values for feeding conditions.25
1.6 Test parameters.27
1.6.1 Environmental conditions .27
1.6.2 Tolerances of components used for testing .27
1.6.3 Test equipment accuracy .27
1.6.4 Test equipment resolution.27
1.6.5 Measurement values.28
1.6.6 TE connection .28
1.6.6.1 Series-connected TEs .28
1.6.6.2 Additional wires.28
1.7 Summary of network tones and signals (informative).28
1.7.1 Dial tone .28
1.7.2 Ringing tone .30
1.7.3 Busy tone.32
1.7.4 Congestion tone .33
1.7.5 Special information tone(s).35
1.7.6 Call in progress tone .38
1.7.7 Tones for other purposes .39
1.7.8 Frequencies for pulse metering.46
1.7.9 Ringing signal.49
1.8 Abbreviations .52
1.9 National designators .53
1.10 Symbols .54
1.11 Summary of references .56
History.57

Page 4
ETS 300 001 - Chapter 1 : December 1994
Blank Page
Page 5
ETS 300 001 - Chapter 1 : December 1994
Foreword
Chapter 1 of this European Telecommunication Standard (ETS) has been produced by the Terminal
Equipment (TE) Technical Committee of the European Telecommunications Standards Institute (ETSI).
The text of this ETS may be utilized, wholly or in part, for the establishment of NET 4.
For historical purposes, this ETS was drafted in the form of a NET. However, the terms NET or NET 4 in
this document should be read as ETS or ETS 300 001 respectively.
This ETS comprises ten chapters:
"Attachments to Public Switched Telephone Network (PSTN); General technical requirements for
equipment connected to an analogue subscriber interface in the PSTN".
Chapter 1 - General
Chapter 2 - DC characteristics
Chapter 3 - Ringing signal characteristics
Chapter 4 - Transmission characteristics
Chapter 5 - Calling functions
Chapter 6 - Answering function
Chapter 7 - Power failure
Chapter 8 - Connection methods
Chapter 9 - Special functions
Chapter 10 - Additional unclassified requirements
This is the first chapter providing, among other information, the scope of this ETS, definitions, symbols
and abbreviations, an explanation of the structure of the ETS and its method of use.
This ETS contains requirements and associated compliance tests. Each compliance test has been
assigned a section number which is identical to that of the related requirement and has been given the
prefix "A". The requirements and their associated compliance tests are grouped together in the main body
of this ETS.
National variations to each requirement and test, which may be particular to an Administration, are given
as additional text within the body of each requirement or test. The national designations used are given in
section 1.9 of this chapter. Section 1.3 provides further details on the structure and how to use this ETS.

Page 6
ETS 300 001 - Chapter 1 : December 1994
Blank page
Page 7
ETS 300 001 - Chapter 1 : December 1994
1 General
1.1 Introduction
1.1.1 Foreword
It is recognised, in the field of telecommunications within Europe, that there is a need to create common
European standards for telecommunication equipment.
Such harmonisation would, among other things, facilitate co-operation between telecommunication
equipment manufacturers and public telecommunication network operators, create a marketplace which
naturally transcends that of national frontiers, enhance the efficiency of business and other
communications across Europe to bring economic benefits, and help translate the vision of a united
Europe into a working reality.
In 1985, an initiative by the Conference of European Posts and Telecommunications Administrations
(CEPT) resulted in the drafting of a Memorandum of Understanding (MoU) agreeing to the mutual
recognition of results of tests of conformity to a technical specification which would be known as a Norme
Européenne de Telecommunication (or NET). The signatories of the MOU represent the
telecommunications administrations of most countries in Western Europe, including EEC and EFTA
administrations.
In 1986, European Community Council Directive 86/361/EEC laid down the principles of the initial stage of
the mutual recognition of type approval for telecommunications Terminal Equipment (TE). The Directive
imposes the obligation on EC Member States to implement the recognition of tests to common conformity
specifications.
1.1.2 NETs
The guiding principals under which a NET is written are the need to ensure that essential requirements
are met.
These include:
- user safety, insofar as this requirement is not covered by other legal instruments (e.g. Directive
73/23/EEC);
- safety of employees of the public telecommunication network operators, insofar as this requirement
is not covered by other legal instruments (e.g. Directive 73/23/EEC);
- protection of public telecommunication networks from harm;
- interworking of TE, in justified cases.
Each NET constitutes part of a series of NETs prepared in response to the MOU and the EC Directive
86/361.
A NET details the requirements, and a specification of interface tests for conformance to those
requirements, which a defined type of telecommunication TE is required to satisfy in order to obtain
authorisation for connection of the equipment to a defined European Telecommunications Network. The
NET also includes, where appropriate, requirements made necessary in a given State by historical
network peculiarities.
The existence of a NET will make it possible for an accredited laboratory in a country whose
administration has signed the MOU, to carry out tests, specified in the NET, on TE submitted to it, and to
issue a test report. On the basis of the report, a competent body may then issue a certificate of conformity
to the NET. There may of course be cases where the laboratory itself is the competent certification
authority. This certificate is then recognised as valid in all other signatory countries, avoiding the need for
the equipment to have to undergo the same tests, over and over again, each time approval is applied for
in any of those countries.
The common reference point which a NET represents thus offers the opportunity of substantially reducing
the complexity, length and cost of approval formalities. The operators of public networks are required to
make reference to relevant NETs in public supply contracts. Manufacturers are thereby enabled to
compete on a more equal technical basis in the supply of terminal equipment covered by NETs.

Page 8
ETS 300 001 - Chapter 1 : December 1994
1.1.3 Types of NET
The majority of NETs fall into one of two categories; access NETs and terminal NETs as described below;
a) Access NET
Details of the technical characteristics (electrical, mechanical and access control protocols), to be
offered by TE at the interface to a specific public telecommunications network are covered in an
access NET.
The objective of an access NET is to ensure no disturbance occurs to the network and to ensure
interworking between network and TE so that calls can be routed successfully through the network
(but without any guarantee of terminal to terminal operation). Indeed, since an access NET may
have to serve a number of terminal NETs and applications which have not even been envisaged at
present, it is important for the content not to include anything which is particular to a specific
terminal or otherwise inhibiting to new developments.
b) Terminal NET
The objective of a terminal NET is to ensure the end-to-end compatibility of a defined
telecommunication service. The terminal NET should indicate any requirement which must be
added to the corresponding access NET(s) to ensure end-to-end communication.
1.1.4 NET 4
ETSI has adopted this approach in the generation of NETs, but labelled as follows:
a) Aspect 1 - General requirements;
b) Aspect 2 - Access requirements;
c) Aspect 3 - TE requirements.
This document is a candidate for adoption as an access NET and is to be used for type approval
according to the scope stated in section 1.2.
TE submitted for type approval is subject to Aspect 1 requirements in every case and, in addition to other
relevant requirements e.g. NETs, international or national specifications. Such additional requirements are
not contained in this document.
Aspect 3 NETs or other national standards which are relevant to a given type of TE meeting the
requirements of this NET shall be in addition to, and refer to the requirements in this NET and shall not
modify the requirements in this access NET.
1.1.4 (D) 1 In accordance with the three level approach of EG and ETSI, all TEs have to
fulfil in addition to the requirements stated in this document the following Aspect
1 requirements:
- electrical safety;
- climatic environment;
- EMC.
As long as there are no European recommendations for electrical safety, climate
and EMC, the relevant enclosures of the national specifications 1 TR 2, Part 1
are applicable.
Page 9
ETS 300 001 - Chapter 1 : December 1994
1.2 Scope
This Access ETS specifies the technical requirements (electrical, mechanical and method of signalling)
and their associated compliance tests to be met by all TE at each of its ports provided for connection to
the Public Switched Telephone Network (PSTN). This connection is effected at a standard analogue
interface. This interface is characterised by a two-wire derived presentation using dc loop seizure and
clear and low-frequency ac ringing signals below the speech passband.
These requirements and associated compliance tests form the definition of the standard analogue PSTN
access (Aspect 2) in each of the participating Administrations.
It is recognised that for historical reasons requirements and their associated compliance tests may include
values particular to each Administration's network. These requirements reflect existing standards.
This access ETS does not necessarily contain all the requirements which a specific type of TE shall meet
in order to gain type approval for attachment to the relevant PSTN attachment point.
1.2 (DK) 1 This document does not form the type approval requirements for those
equipments that are part of PABX or other complex installations connected to
the PSTN.
For these types of installations, including their associated (series- or parallel
connected) equipment to the PSTN, DK national requirements apply.
In every case, reference shall be made to the DK Approval Authority in order to
determine the totality of applicable requirements and associated tests.
1.2 (SF) 1 This document does not form the type approval requirements for TE that contain
call routing and switching functions except very small PBXs or key systems with
1 or 2 trunk lines. For TE with more trunk lines, the national standards apply.
1.2 (F) 1 The national values contained in the current issue of this NET are not applicable
to the standard analogue interface used for the connection to the PSTN when
connecting a complex installation. For these types of installation, connection to
the PSTN is covered by:
- I-ETSs 300 003 and 300 004 for transmission characteristics of digital PABXs;
- national standards for other characteristics of digital PABXs and for other complex
installations, until a new enhancement of this ETS will be available.
Complex installations are hereby understood as equipment:
- including switching capability to interconnect at least one PSTN access with at least
two other ports (e.g. PBXs);
or
- able to interconnect PSTN accesses (e.g. call diverting devices);
or
- able to broadcast the same information to several PSTN accesses at the same time.
1.2 (D) 1 This document basically applies to all TE intended for linking to customer
accesses with analogue interconnection points. For PBXs, besides the interface
requirements set out in this document, relevant provisions are contained in the:
- approval specifications for PABXs and telecommunications systems, KNr.: 651 500
800-0 (catalogue number).
1.2 (D) 2 This document is applicable for PABXs and telecommunications systems in
which the a/b input wires are switched galvanically to the extension lines.
Technical equipment intended for connection to these PABXs via user accesses
for permanent services are subject to other regulations. This document does not
apply for TEs connected to public call offices.

Page 10
ETS 300 001 - Chapter 1 : December 1994
1.2 (D) 3 This guideline does not apply to TE intended to be connected to:
- user access for broadcast services;
- radiopaging accesses;
- special telephone accesses;
a) mobile radiotelephone accesses;
b) accesses for maritime mobile communication;
c) Rhine radiotelephone accesses;
d) emergency telephone accesses for the police and fire brigade;
e) public emergency call boxes;
- telephone accesses with Impulskennzeichengabe (IKZ);
- telephone accesses with Gleichstromkennzeichengabe (GKZ);
- accesses for Group 1 fixed connections (leased lines);
- accesses for the warning and alarm service.
For these accesses special regulations apply.
1.2 (D) 4 In view of the reunification of the FRG and the GDR, the requirements imposed
by the FRG in this document possibly have to be supplemented with the
particularities of the GDR-specific network requirements. Pending
corresponding amendment of this document, the document containing these
particularities can be obtained from the approval authority and may be ordered
from there.
1.2 (I) 1 This document does not form the type approval requirements for those TE that
contain call routing or switching functions. In these cases Italian national
requirements apply. In every case, reference must be made to the Italian
Approval Authority in order to determine the totality of applicable requirements
and associated tests.
1.2 (NL) 1 This document does not contain the type approval requirements for those TE
that contain call routing and switching functions. In these cases Dutch national
requirements apply and reference must be made to the Dutch Approval
Authority in order to determine the totality of applicable requirements and
associated tests.
1.2 (N) 1 This document does not contain the type approval requirements for those
equipment that includes call routing and switching functions, and which provides
local dc loop current on the extension side of the equipment. In these cases the
Norwegian national requirements apply.
1.2 (S) 1 This standard shall not form the type approval requirements for user classes of
equipment that are characterised as providing:
- multiple lines to the PSTN;
- multiple ports for separately identifiable terminal equipment;
- switching and routing functions; and
- the capability of providing additional telecommunication services at these ports not
provided by the PSTN.
Accordingly, this document is not applicable for PBXs and other private
telecommunication networks nodal components.
In these cases the Swedish national requirements apply.
1.2 (GB) 1 This document does not form the type approval requirements for equipment that
contain certain call routing or certain switching functions, in these cases UK
national requirements apply and reference must be made to the UK Approval
Authority in order to determine the totality of applicable requirements and
associated tests.
Page 11
ETS 300 001 - Chapter 1 : December 1994
1.3 Method of use
1.3.1 Structure of the ETS
This ETS contains requirements and associated compliance tests. Each compliance test has been
assigned a section number which is the same as the related requirement and has, in addition, a prefix "A".
Thus the requirements and their associated compliance tests are grouped together in the main body of the
document.
Where applicable, each requirement and associated compliance test have harmonised text which includes
parameters to which each Administration may assign its own values. In these cases, parameter values are
set out in accompanying tables.
National variations to each requirement and test which may be particular to a single Administration are set
out as additional text within the body of each requirement or test. These are designated nationally
according to the convention set out in section 1.9 and are referenced in the "remarks" column of relevant
tables.
This ETS includes a number of Chapters, arranged according to general technical content; Chapter 1
includes introductory information of a general nature, definitions and abbreviations. Chapter 10 includes
technically unclassified additional national requirements and tests particular to various Administrations. It
may therefore be necessary, in order to determine the total requirement and compliance test in any given
case, to refer to the harmonised text and its national variations as well as to the relevant contents in
Chapter 10.
1.3.2 Use of requirements and tests
Each of the requirements in the common text of this document is a harmonised text. The use of each
requirement by each Administration is determined by parameter values shown in the requirement table(s)
and may be qualified further by remarks. These are set out in the requirement table(s).
It is common to find that certain requirements are to be met over ranges of parameter values; for
example, return loss values might be required to be met over two independent ranges of frequency and of
loop current. In such cases, compliance may be determined by testing at a limited number of parameter
test values within these ranges. Such cases are clearly set out. TE which, on the basis of testing outlined
in this document, appears to comply with a requirement but which subsequently is found to be non-
compliant at an untested point within the range must be considered according to the relevant type
approval procedures under which this document is used.
1.4 Definitions of terms used in this ETS
The following terms are given particular meaning within this ETS. Other technical terms not specifically
mentioned are to be taken according to their normally accepted meaning.
1.4.1 Local subscriber line (analogue)
An analogue subscriber line is part of a local telephone network and is traditionally metallically connected
to the analogue interface of an exchange port by means of two wires (normally termed the a-wire and the
b-wire) and to which an unique telephone network address has been assigned (telephone number).
NOTE: This definition does not exclude standard analogue interfaces of the PSTN where a
unique telephone network address is assigned to a number of such separate physical
presentations.
1.4.2 Public Switched Telephone Network (PSTN)
A generally used term for the nation-wide public telephone network comprising interconnected telephone
exchanges capable of switching telephone calls between telephones connected to the network
(exchanges).
Page 12
ETS 300 001 - Chapter 1 : December 1994
1.4.3 PSTN connection point
The point where the local subscriber line (analogue) is terminated, the PSTN standard analogue interface
is presented and the TE is connected. Reference is made to figure 1.4.4.3.
a) Leads a and b are provided for connection to the PSTN.
1 1
b) Leads a and b (if they are provided) are intended for the connection of this TE in series with
2 2
other TEs.
c) Additional leads for instance n (if provided) are intended for auxiliary connections, to be defined by
the National Administrations' Network Termination Schedules (Chapter 8).
d) Additional leads for instance n (if provided) are intended for optional connections, to other TEs, to
be defined in Chapter 8.
e) Lead "e" (if provided) is intended for connection to signal earth.
f) Figure 1.4.4.3 does not indicate that TEs may have other interfaces. These interfaces are not
described in this document.
1.4.3 (E) 1 Common reference terminal
The common reference terminal is defined as the terminal or lead provided for
connection to a common reference potential, for the functional purpose of
receiving longitudinal 50 Hz metering pulses. In the Spanish contribution (E) this
terminal or lead is normally called "REF", and it may either be connected
internally to the earth terminal or lead "e", when it exists, or not.
1.4.4 Terminal equipment
1.4.4.1 General definitions
Terminal equipment is defined as an equipment which is intended to be connected to a termination point
of PSTN (PSTN connection point: PSTN CP).
One-port TE is defined as TE with wires or leads intended solely for connection to a PSTN CP (see figure
1.4.4.1.a).
Figure 1.4.4.1.a: One-port TE
Series-connected TE is defined as TE intended to be attached to a PSTN CP and which in addition
provides a second connection point to which a second TE may be attached so as to permit this second TE
to be excited solely by loop current wholly derived from the PSTN connection (see figure 1.4.4.1.b).

Page 13
ETS 300 001 - Chapter 1 : December 1994
Figure 1.4.4.1.b: Series-connected TE
NOTE: Two or more TE can be connected to the PSTN CP in parallel (see figure 1.4.4.1.c).
Figure 1.4.4.1.c: Parallel connected TE
1.4.4.1 (D) 1 For TEs with telephony functions in Germany direct parallel connection is not
permitted. Reference is made to Chapter 8.
1.4.4.1 (D) 2 In the German contribution (D), in some places the term "additional equipment"
which is a special group of series-connected TEs is used instead of "series-
connected TE". Special reference is made to section 8.3 (D).
1.4.4.1 (E) 1 (This remark relates to series-connected TEs).
PROVISION: Network compatibility cannot be expected if several series TEs are
simultaneously connected in series to the same line.
NOTE: In the Spanish contribution (E), the additional requirements for series TEs have the
word "series" included in brackets in the requirement heading.
1.4.4.1 (E) 2 Associated TE
Associated TE is defined as a TE which is approved for connection to the
network. This name is normally used, in the Spanish contribution (E), to
designate a TE which is connected to the line output terminals of a series-
connected TE.
1.4.4.1 (E) 3 Multiline TE
Multiline TE is defined as a TE which is able to be connected to either more than
one PSTN connection point, or to a multiline PSTN CP.

Page 14
ETS 300 001 - Chapter 1 : December 1994
NOTE: In the Spanish contribution (E), the additional requirements for multiline TEs have the
word "multiline" included between brackets in the requirement heading.
1.4.4.1 (GB) 1 Series-connected TE
Series-connected TE can be of two types:
i) those for which the electrical characteristics have in every case values that represent
the maximum impairment that may be introduced between the main TE and the PSTN
connection point (CP) of a complete system; consequently, if the whole of the
allowance for one or more of the parameters is consumed by a series-connected TE
then no other equipment or leads consuming the same characteristic will be permitted
within a system containing such series-connected TE;
ii) those for which the electrical characteristics have sufficient margin against the
maximum allowable impairments such that more than one such series-connected TE
can be connected within a system; the number of items of TE that may be series-
connected is determined by the Series Equivalent Number (SEN), which may have a
value between 0,3 and 1.
Thus SEN is a number that represents the portion of the maximum allowable
impairment which is taken up by a series-connected TE and may be used to
calculate the composition of a TE system connected to the PSTN; this number
is determined by the larger of two quantities representing the dc resistance and
the insertion loss (see 4.3 (GB) 1).
1.4.4.2 Types of TE
TE can generally be categorised into one or more of the following types:
Type 1: One-port TE capable of holding the loop condition by itself (e.g. telephone set),
see figure 1.4.4.2.a.
Figure 1.4.4.2.a: One-port TE (loop holding)
Type 2: One-port TE not capable of holding the loop condition by itself (e.g. ringing
detector) see figure 1.4.4.2.b.
Figure 1.4.4.2.b: One-port TE (non-loop holding)
Type 3: A series-connected TE through which the loop condition to another TE can be
maintained, but is capable of holding the loop condition by itself. It is possible for
this type to have two arrangements:

Page 15
ETS 300 001 - Chapter 1 : December 1994
Type 3 (I): The loop is held but the output port is disconnected (e.g. modem), see figure
1.4.4.2.c.
Figure 1.4.4.2.c: Series-connected TE (loop holding, output disconnected)
Type 3 (II): The loop is held and the output port remains connected (e.g. answering
machine), see figure 1.4.4.2.d.
Figure 1.4.4.2.d: Series-connected TE (loop holding, output connected)
Type 4: A series-connected TE through which the loop condition to another TE can be
maintained, but is not capable of holding the loop condition by itself (e.g.
monitoring device), see figure 1.4.4.2.e.
Figure 1.4.4.2.e: Series-connected TE (non-loop holding)

Page 16
ETS 300 001 - Chapter 1 : December 1994
1.4.4.3 Reference model of a TE
A reference model of a TE is shown in figure 1.4.4.3.
Figure 1.4.4.3: TE reference model
1.4.4.3 (B) 1 The second plug (or socket) shown in figure 1.4.4.3 may be combined with the
first plug as a standard intermediate plug (see Chapter 8).
1.4.4.4 Testing point
Testing points are defined in table 1.4.4.4. in conjunction with figure 1.4.4.4 (see also figure 1.4.4.3).
Figure 1.4.4.4: Definition of testing point

Page 17
ETS 300 001 - Chapter 1 : December 1994
Table 1.4.4.4: Testing points
TESTING POINT
Remarks
COUNTRY
TP TP TP TP TP TP TP
0 1 2 3 4 5 6
Austria X X yes
Belgium X X yes
Cyprus X X yes
Denmark X X X X yes
Finland X X X X yes
France X X X X
Germany X X yes
Greece X X X X yes
Iceland X X
Ireland yes
Italy X X X X yes
Luxembourg X X
Malta
Netherlands X X
Norway X X X X yes
Portugal X X X X X yes
Spain X X yes
Sweden X X X X yes
Switzerland X X X yes
U. Kingdom X X X X X X
1.4.4.4 (A) 1 Testing point TP shall be used if cross-talk is possible to other circuits.
1.4.4.4 (B) 1 In case of multiline TE, the testing points may be TP (or TP ) and TP (or TP ).
2 3 5 4
1.4.4.4 (CY) 1 TP shall only be used in case the cord is removable.
1.4.4.4 (DK) 1 If the TE is provided with a cord, the type approval shall include plug and cord. If
the TE is provided with a permanent connection (e.g. screws), the testing shall
be performed using TP and TP , respectively.
3 4
1.4.4.4 (SF) 1 If the TE is provided with a cord, the type approval shall include the plug and
cord (testing point TP ). If the TE is provided with a permanent connection (e.g.
screws), the testing shall be performed using TP .
In case of a series-connected TE testing point TP or TP is used, depending on
4 6
whether the series-connected TE has plug and cord or a permanent connection.
1.4.4.4 (D) 1 If the TE is provided with a cord, the type approval shall include the plug and
cord. If the TE is provided with a permanent connection (e.g. screws), the
testing shall be performed using TP .
1.4.4.4 (GR) 1 If the TE is provided with a cord, the type approval shall include the plug and
cord. If the TE is provided with a permanent connection (e.g. screws), the
testing shall be performed using TP and TP if it exists.
3 4
1.4.4.4 (IRL) 1 If the TE is provided with a cord, the type approval shall include the plug and
cord. If the TE is provided with a permanent connection (e.g. screws), the
testing shall be performed using TP . The test points for series-connected
equipment where applicable on port a b shall be the second plug or socket if
2 2
supplied with the TE, or else TP .
1.4.4.4 (I) 1 If the TE is provided with a cord, the type approval shall include the plug and
cord. If the TE is provided with a permanent connection (e.g. screws), the
testing shall be performed using TP and TP if it exists.
3 4
Page 18
ETS 300 001 - Chapter 1 : December 1994
1.4.4.4 (N) 1 If the TE is provided with a cord, the type approval shall include the plug and
cord. If the TE is provided with a permanent connection (e.g. screws), the
testing shall be performed using TP .
1.4.4.4 (N) 2 If the TE is provided with a cord, TP is used. If the TE is provided with a
permanent connection, the TP is used.
1.4.4.4 (P) 1 TE provided with cord(s) and plug(s) shall be tested with the related socket(s).
So, testing point TP shall be used.
1.4.4.4 (P) 2 Testing point TP shall be used for TE provided with a cord or a cord and a
connection box.
1.4.4.4 (P) 3 Testing point TP shall be used for TE provided with a cord, a cord and a
connection box or a cord and a socket.
1.4.4.4 (P) 4 Testing points TP and TP shall be used for TE provided with no cords.
3 4
1.4.4.4 (E) 1 The cord which is shown in figure 1.4.4.4 cannot be a constitutive part of the
TEUT, but the plug shall be.
NOTE: When the TEUT is provided with an earth (or earth protection) terminal or lead, then
the testing point 3 (TP ) (or testing point TP ) is used in certain test arrangements
3 4
together with the accessible parts.
1.4.4.4 (CH) 1 If the TE is provided with a cord, the type approval shall include the plug and
cord. If the TE is provided with a permanent connection (e.g. screws), the
testing shall be performed using TP .
1.4.5 States or conditions of TE
The states below are always states of TE.
1.4.5.1 Quiescent or idle state or condition
Quiescent or idle state or condition is defined as an electrical condition into which the TE, when connected
to the network, is placed such that it draws minimum current and does not activate the exchange.
In this case some equipment connected in series to other TE may be operating (e.g. recording apparatus
with a high ohmic resistance).
1.4.5.1 (E) 1 When the TE is in quiescent or idle state or condition, it shall not be capable of
sending nor receiving speech-band information to or from the network. (See
also the paragraph "a" in section 1.4.5.1 (E) 2, and the note in section 1.4.5.3
(E) 1).
1.4.5.1 (E) 2 High impedance state or condition
High impedance state or condition is defined as an electrical condition into which
the TE, when connected to the network, is placed such that it is
a) potentially capable of sending or receiving speech-band information or other classes of
signals to or from the network;
and
b) supposed to be simultaneously when another TE, which is connected to the same
termination point of the network, is in loop condition or dialling condition or register
recall condition. It shall be noted that this condition may be exclusively invoked during
the situation defined here.
Page 19
ETS 300 001 - Chapter 1 : December 1994
1.4.5.2 Ringing state or condition
Ringing state or condition is defined as a quiescent or idle state or condition into which ringing signal is
applied.
1.4.5.3 Loop state or condition
Loop state or condition is defined as an electrical condition into which, when connected to the network, TE
is placed such that it draws enough dc current to be capable of activating the exchange.
1.4.5.3 (E) 1
PROVISION: In some Spanish requirements, when no specific mention to the high impedance
condition is made, and the term loop condition is used just in the opposite
meaning of the term quiescent condition, the term loop condition is also used
simultaneously with the sense of high impedance condition (see section 1.4.5.1
(E) 2).
NOTE: Usually, the TE in loop condition is potentially capable of sending or receiving speech-
band information to or from the network.
1.4.5.4 Dialling or signalling state or condition
Dialling or signalling state or condition of a TE is defined as a condition into which the TE, when
connected to the network, is placed such that it passes to the network break pulses or MFPB signals.
1.4.5.5 Register recall state or condition
Register recall state or condition of a TE is defined as a condition into which the TE, when connected to
the network, is placed such that it passes to the network a register recall signal.
1.4.6 Line terminals
The term "line terminals" is used throughout the NET as an abbreviated form of "terminals or leads
provided for connection to the PSTN CP".
1.4.6 (E) 1 The term "line terminals" is also used instead of line input terminals in series
TEs. They are normally called "a " and "b " ("a ,i", "b ,i", for multiline TEs).
1 1 1 1
1.4.6 (E) 2 Line input terminals
Line input terminals are defined as the two terminals of the port provided for
connection to the network in series TEs. They are normally called "a " and "b "
1 1
("a ,i", "b ,i", for multiline TEs).
1 1
1.4.6 (E) 3 Line output terminals
Line output terminals are defined as the two terminals of the port which provides
a termination point for the connection of one associated TE (see section 1.4.4.1
(E) 2) in series TEs. They are normally called "a " and "b " ("a ,i", "b ,i", for
2 2 2 2
multiline TEs).
1.4.7 Speech band
The speech band is defined as the 300 - 3 400 Hz frequency band.

Page 20
ETS 300 001 - Chapter 1 : December 1994
1.5 DC feeding arrangements
The dc feeding arrangements differ for each Administration but generally are of a similar nature to that
given in the Idealised Feeding Bridge described in figure 1.5. The feeding resistance R includes the
f
resistance of the inductor L .
f
Figure 1.5: Idealised feeding bridge circuit
The standard values of inductors L and capacitors C for each Administration are included within this
f f
section (see table 1.5).
Table 1.5: Idealised feeding bridge values
REQUIREMENT VALUES
Remarks
COUNTRY C L
f f
(μF) (H)
Austria
≥ 47 ≥ 5
Belgium 20 5
Cyprus 4 2
Denmark yes
≥ 2 ≥ 2
Finland
2 ± 2% ≥ 2
France 100 ± 5% 5 ± 10%
Germany
≥ 47 ≥ 5
Greece 20 5
Iceland
≥ 2 ≥ 2
Ireland 470 10
Italy yes
2 ≥ 1
Luxembourg
≥ 47 ≥ 5
Malta
Netherlands 20 2
Norway
≥ 10 ≥ 5
Portugal ≥ 50 ≥ 2,5
Spain yes
≥ 20 ≥ 5
Sweden
≥ 2,2 ≥ 2
Switzerland ≥ 47 ≥ 5
U. Kingdom
≥ 400 ≥ 10
1.5 (DK) 1 Requirement values according to national test circuits.

Page 21
ETS 300 001 - Chapter 1 : December 1994
1.5 (I)1 C = 47 μF; L = 5 H to perform type approval tests in section A.4.1.2.
f f
1.5 (E) 1 In some test procedures other feeding arrangements or other values may be
used.
In all cases in which a feeding bridge is specified, the values of inductors (L )
f
and capacitors (C ) shall be met at all frequencies of measurement, and the
f
circuit diagram of the feeding bridge used may have additional components to
meet this requirement. For this reason the diagram shown in figure 1.5 is
considered to be an idealised representation of the circuit at the frequency or
frequencies of measurement.
In all cases in which a dc voltage source or an ac signal generator is specified, it
is understood that the values of the external associated components absorb the
values of the source/generator output resistance.
When a dc voltage source is connected in series with an ac signal generator,
both they shall be coupled in such a manner that the magnitude of the dc
voltage source impedance shall be near 0 Ω, at the frequencies of testing.
1.5 (E) 2 Mains test power source
When the Terminal Equipment Under Test (TEUT) is intended to be connected
to the mains, then
a) the voltage of the mains test power source shall be within ± 5% of any of the declared
nominal mains voltages for which the TE is prepared;
and
b) the frequency of the mains test power source shall be within ± 1 Hz of the nominal
frequency of 50 Hz.
1.5 (E) 3 Other test power sources
When the TEUT is intended to be powered from power sources other than the
network and/or the mains, the voltage of the test power sources shall be within
± 5% of the declared nominal voltages.
1.5.1 Requirement values for feeding conditions
The range of ΔV , ΔR and ΔI (where applicable) which should be applied to the feeding bridge circuit in
f f f
order to represent t
...