ETSI I-ETS 300 245-7 ed.1 (1995-11)

Integrated Services Digital Network (ISDN); Technical characteristics of telephony terminals; Part 7: Locally generated information tones

T/TE 10-07 (G)

Digitalno omrežje z integriranimi storitvami (ISDN) – Tehnične karakteristike telefonskih terminalov – 7. del: Lokalno generirani informacijski toni

General Information

• Status: Published
• Publication Date: 23-Nov-1995
• Technical Committee: TE 4 - Audiovisual and Voice Terminals
• Current Stage: 12 - Completion
• Due Date: 01-Dec-1995
• Completion Date: 24-Nov-1995
• Ref Project: SIST I-ETS 300 245-7 E1:2003 - Integrated Services Digital Network (ISDN); Technical characteristics of telephony terminals; Part 7: Locally generated information tones

Standards Content (Sample)

SLOVENSKI STANDARD
SIST I-ETS 300 245-7 E1:2003
01-december-2003
'LJLWDOQRRPUHåMH]LQWHJULUDQLPLVWRULWYDPL,6'1±7HKQLþQHNDUDNWHULVWLNH
WHOHIRQVNLKWHUPLQDORY±GHO/RNDOQRJHQHULUDQLLQIRUPDFLMVNLWRQL
Integrated Services Digital Network (ISDN); Technical characteristics of telephony
terminals; Part 7: Locally generated information tones
Ta slovenski standard je istoveten z: I-ETS 300 245-7 Edition 1
ICS:
33.080 Digitalno omrežje z Integrated Services Digital
integriranimi storitvami Network (ISDN)
(ISDN)
SIST I-ETS 300 245-7 E1:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST I-ETS 300 245-7 E1:2003

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SIST I-ETS 300 245-7 E1:2003
INTERIM
EUROPEAN I-ETS 300 245-7
TELECOMMUNICATION November 1995
STANDARD
Source: ETSI TC-TE Reference: T/TE-10-07 (G)
ICS: 33.080
ISDN, telephony terminal, information tones
Key words:
Integrated Services Digital Network (ISDN);
Technical characteristics of telephony terminals;
Part 7: Locally generated information tones
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

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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.

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Contents
Foreword .5
1 Scope .7
2 Normative references.7
3 Definitions and use of tones.7
4 Tone classification and minimum requirements.8
5 Control of tone generation.10
5.1 Dial tones (normal or special) .10
5.1.1 En-bloc sending.10
5.1.2 Overlap sending .10
5.2 Ringing tone.10
5.3 Call reject and invalid attempt.10
5.3.1 Receipt of network messages.10
5.3.2 Call cleared by remote user .11
5.3.3 No B-channel available.11
5.3.4 Termination of tone .11
5.4 Call waiting tone.11
6 Tone characteristics .11
6.1 Sound pressure level .11
6.2 Distortion.12
6.3 Frequency and cadence .12
6.4 Switching delay (informative) .12
Annex A (normative): Selection of tones according to cause values .13
Annex B (normative): Test specifications.14
B.1 General conditions for testing.14
B.1.1 Environment for tests.14
B.1.2 Test equipment interface .14
B.1.3 Test equipment requirements.14
B.2 Tone measurements .14
B.2.1 Measurement of continuous tones.14
B.2.1.1 Sound pressure level.14
B.2.1.2 Frequency.14
B.2.1.3 Distortion .15
B.2.2 Measurement of pulsed tones .15
B.2.2.1 Level.15
B.2.2.2 Frequency.15
B.2.2.3 Distortion .15
B.2.2.4 Timing measurements.15
Annex C (normative): Tone characteristics .16
C.1 General.16
C.2 Dial tone .16
C.3 Ringing tone .16

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C.4 Busy tone. 16
C.5 Congestion tone. 17
C.6 Special information tone . 17
C.7 Call waiting tone. 17
History. 18

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I-ETS 300 245-7: November 1995
Foreword
Part 7 of this Interim European Telecommunication Standard (I-ETS) was produced by the Terminal
Equipment (TE) Technical Committee of the European Telecommunications Standards Institute (ETSI).
An ETSI standard may be given I-ETS status either because it is regarded as a provisional solution ahead
of a more advanced standard, or because it is immature and requires a "trial period". The life of an I-ETS
is limited to three years after which it can be converted into an ETS, have it's life extended for a further
two years, be replaced by a new version, or be withdrawn.
This is the seventh Part of an I-ETS which is currently comprises eight Parts:
Part 1: General (I-ETS 300 245-1 [3]);
Part 2: PCM A-law, handset terminals;
Part 3: PCM A-law, loudspeaking and handsfree function;
Part 4: Interface for additional equipment;
Part 5: Wideband coding handset functions;
Part 6: Wideband coding loudspeaking and handsfree telephony;
Part 7: Locally generated information tones;
Part 8: Terminal application of 16 kbit/s speech coding algorithm.
The large number of services and facilities offered by the Integrated Services Digital Network (ISDN)
requires that many items of information be provided to the human user in order to describe call progress,
and to invite the user to react as appropriate. Related data, controlled by the network, are either displayed
on the user's terminal or transmitted as tones or voice announcements through a B-channel.
The requirements concerning connection of the acoustic receiving transducer to the B-channel are
detailed in I-ETS 300 245-1 [3], subclause 5.3.1.
The local generation of tones under control of messages received through the D-channel is another
possibility.
This option allows the use of a man-machine procedure similar to the case of conventional analogue
telephony terminals and/or replacement of network provided tones by a set of locally generated tones.
Proposed announcement date
Date of adoption of this I-ETS: 10 November 1995
Date of latest announcement of this I-ETS (doa): 29 February 1996

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1 Scope
Part 7 of this I-ETS defines the use of a set of standardized tones which, as an option, may be generated
by a digital telephony terminal as specified in I-ETS 300 245-1 [3], subclause 5.3.2.
This Part includes related information and requirements concerning the:
- definition and use of tones;
- control of tone generation;
- tone characteristics.
This I-ETS applies to terminals for connection to the ISDN basic access of the coincident S and T
reference point.
2 Normative references
This Part of the I-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 Part of this I-ETS only when incorporated in it by amendment or revision. For undated
references, the latest edition of the publication referred to applies.
[1] ETS 300 102-1 (1990): "Integrated Services Digital Network (ISDN); User-
network interface layer 3, Specifications for basic call control".
[2] ETS 300 085 (1990): "Integrated Services Digital Network (ISDN); 3,1 kHz
telephony teleservice, Attachment requirements for handset terminals
(Candidate NET 33)".
[3] I-ETS 300 245-1: "Integrated Services Digital Network (ISDN); Technical
characteristics of telephony terminals, Part 1: General".
[4] ETS 300 153: "Integrated Services Digital Network (ISDN); Attachment
requirements for terminal equipment to connect to an ISDN using ISDN basic
access (Candidate NET 3, Part 1)".
[5] ITU-T Recommendation P.57 (1993): "Artificial ears".
[6] IEC Publication 651: "Sound level meters".
3 Definitions and use of tones
In order that a user always hears an identical tone in various European countries, when the call meets the
same situation, a convenient set of harmonized tones should be used.
This facility is an option as specified in I-ETS 300 245-1 [3], subclause 5.3.2. The user should be provided
with a means of implementing this option.
The set of tones should be kept to a minimum, while providing the user with a sufficient knowledge of the
situation, in order that he can determine which specific behaviour or action is required.
For the purposes of this Part of this I-ETS, the following definitions apply. The set of standardized tones
and their meaning in the ISDN terminal application is described as follows:
dial tone: Indicates that the terminal or the network is ready to receive call information and invites the
user to start dialling.
special dial-tone: An alternative to the dial tone that reminds the user that special conditions apply to
his/her terminal (a local or network provided facility/supplementary service has been activated).

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ringing tone: Indicates that the outgoing call is presented to, and acknowledged by, at least one
compatible terminal at the called party's premises (however, this terminal may already be engaged in
another call).
busy tone: Informs the caller that the called party is busy.
congestion tone: Informs the caller that a temporary network congestion, error, etc., rejects his call
attempt.
call waiting tone: An indication advising the called party, already engaged in another telephony call, that
his terminal has received a new incoming call.
special information tone: Informs the caller that an auditory or visual announcement clarifying the call
progress will normally follow. This may indicate call diversion, number not valid, etc, .
invalid attempt indication: An indication that the call attempt has been rejected by the network for some
special reason. e.g. error, fault, unallowed number. It informs the user that his call attempt has not been
successful and should not normally be tried again. Additional information on the nature of the failure may
be provided. The special information tone is used for this purpose. Where the special information tone is
not available the congestion tone shall be provided.
call reject indication: An indication that the call attempt (or established call) has met a situation where it
should be cleared. Busy tone or congestion tone are used for this purpose.
NOTE: When the digital telephony terminal is connected to an ISDN providing detailed data
about call rejection (through a "cause" information element), the call reject indication
may be used with a more restrictive meaning indicating that the call attempt was valid
and may be tried again, taking into account additional information which may be
displayed on the terminal. The "causes" associated with this restrictive meaning are
listed in annex A (normative).
4 Tone classification and minimum requirements
The tones, with their conditions for delivery, may be classified as follows:
Type 1: tones which could not be received from the network since a B-channel is not yet
or no longer available;
Type 2: tones generated in place of network-provided tones;
Category A: tones which may be useful to keep the same man-machine procedure, e.g. in
the case of conventional analogue terminals;
Category B: tones which are considered as basic requirements for the telephony service;
Category C: additional tones.

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