ETSI EN 300 267-1 V1.3.2 (2000-05)

SLOVENSKI STANDARD
01-april-2005
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Integrated Services Digital Network (ISDN); Telephony 7 kHz, videotelephony,
audiographic conference and videoconference teleservices; Digital Subscriber Signalling
System No. one (DSS1) protocol; Part 1: Protocol specification
Ta slovenski standard je istoveten z: EN 300 267-1 Version 1.3.2
ICS:
33.080 Digitalno omrežje z Integrated Services Digital
integriranimi storitvami Network (ISDN)
(ISDN)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

European Standard (Telecommunications series)
Integrated Services Digital Network (ISDN);
Telephony 7 kHz, videotelephony, audiographic conference
and videoconference teleservices;
Digital Subscriber Signalling System No. one (DSS1) protocol;
Part 1: Protocol specification

2 ETSI EN 300 267-1 V1.3.2 (2000-05)
Reference
REN/SPS-05197-1
Keywords
7 KHz, audio, conf, DSS1, ISDN, protocol,
telephony, teleservice, video
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ETSI
3 ETSI EN 300 267-1 V1.3.2 (2000-05)
Contents
Intellectual Property Rights.6
Foreword .6
1 Scope.8
2 References.9
3 Definitions and abbreviations .10
3.1 Definitions.10
3.2 Abbreviations .11
4 Void.12
5 Additional generic requirements for basic telecommunication services not defined in
EN 300 403-1 .12
5.1 Description .12
5.2 Operational requirements .12
5.3 Coding requirements .12
5.4 State definitions.12
5.5 Signalling procedures at the coincident S and T reference point.13
5.5.1 Procedures for establishment of a second or subsequent connection within the same call .13
5.5.1.1 Normal operation .13
5.5.1.2 Exceptional procedures .13
5.5.2 Provision of in-band tones and announcements .14
5.6 Procedures for interworking with private ISDNs .14
5.6.1 Procedures for the establishment of a second connection within the same call .14
5.6.2 Provision of in-band tones and announcements .14
5.7 Interactions with other networks.14
5.8 Parameter values (timers) .14
5.9 Dynamic description (SDL diagrams) .14
6 Telephony 7 kHz teleservice.15
6.1 Description .15
6.2 Operational requirements .15
6.2.1 Provision and withdrawal.15
6.2.2 Requirements on the originating network side.15
6.2.3 Requirements on the destination network side.15
6.3 Coding requirements .16
6.4 State definitions.16
6.5 Signalling procedures at the coincident S and T reference point.16
6.5.1 Call establishment at the originating interface .16
6.5.2 Call establishment at the destination interface .18
6.5.2.1 First connection.18
6.5.2.2 Further connections.18
6.5.3 Call clearing.19
6.5.4 In-band tones and announcements .19
6.5.5 Restart procedure.19
6.5.6 Call rearrangements .19
6.5.7 Call collisions .19
6.5.8 Handling of error conditions.19
6.5.9 User notification procedure .19
6.5.10 Basic telecommunication service identification and selection .20
6.5.11 Signalling procedures for bearer capability selection .20
6.5.12 Signalling procedures for high layer compatibility selection.20
6.5.13 Status request procedures.20
6.6 Procedures for interworking with private ISDNs .20
6.7 Interactions with other networks.21
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4 ETSI EN 300 267-1 V1.3.2 (2000-05)
6.8 Parameter values (timers) .21
6.9 Dynamic description (SDL diagrams) .21
7 Videotelephony teleservice.21
7.1 Description .21
7.2 Operational requirements .22
7.2.1 Provision and withdrawal.22
7.2.2 Requirements on the originating network side.22
7.2.3 Requirements on the destination network side.22
7.3 Coding requirements .22
7.4 State definitions.23
7.5 Signalling procedures at the coincident S and T reference point.23
7.5.1 Call establishment at the originating interface .23
7.5.1.1 First connection.23
7.5.1.2 Further connections.26
7.5.2 Call establishment at the destination interface .26
7.5.2.1 First connection.26
7.5.2.2 Further connections.27
7.5.3 Call clearing.27
7.5.4 In-band tones and announcements .28
7.5.5 Restart procedures .28
7.5.6 Call rearrangements .28
7.5.7 Call collisions .28
7.5.8 Handling of error conditions.28
7.5.9 User notification procedure .28
7.5.10 Basic telecommunication service identification and selection .29
7.5.11 Signalling procedures for bearer capability selection .29
7.5.12 Signalling procedures for high layer compatibility selection.29
7.5.13 Status request procedures.29
7.6 Procedures for interworking with private ISDNs .29
7.6.1 First connection .29
7.6.2 Further connections.30
7.7 Interactions with other networks.31
7.8 Parameter values (timers) .31
7.9 Dynamic description (SDL diagrams) .31
8 Audiographic conference teleservice.31
8.1 Description .31
8.2 Operational requirements .32
8.2.1 Provision and withdrawal.32
8.2.2 Requirements on the originating network side.32
8.2.3 Requirements on the destination network side.32
8.3 Coding requirements .32
8.4 State definitions.33
8.5 Signalling procedures at the coincident S and T reference point.33
8.5.1 Call establishment at the originating interface .33
8.5.1.1 First connection.33
8.5.1.2 Further connections.35
8.5.2 Call establishment at the destination interface .35
8.5.2.1 First connection.35
8.5.2.2 Further connections.36
8.5.3 Call clearing.37
8.5.4 In-band tones and announcements .37
8.5.5 Restart procedures .37
8.5.6 Call rearrangements .37
8.5.7 Call collisions .37
8.5.8 Handling of error conditions.37
8.5.9 User notification procedure .38
8.5.10 Basic telecommunication service identification and selection .38
8.5.11 Signalling procedures for bearer capability selection .38
8.5.12 Signalling procedures for high layer compatibility selection.38
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5 ETSI EN 300 267-1 V1.3.2 (2000-05)
8.5.13 Status request procedures.38
8.6 Procedures for interworking with private ISDNs .38
8.6.1 First connection .38
8.6.2 Further connections.40
8.7 Interactions with other networks.40
8.8 Parameter values (timers) .40
8.9 Dynamic description (SDL diagrams) .40
9 Videoconference teleservice .40
9.1 Description .40
9.2 Operational requirements .41
9.2.1 Provision and withdrawal.41
9.2.2 Requirements on the originating network side.41
9.2.3 Requirements on the destination network side.41
9.3 Coding requirements .41
9.4 State definitions.42
9.5 Signalling procedures at the coincident S and T reference point.42
9.5.1 Call establishment at the originating interface .42
9.5.1.1 First connection.42
9.5.1.2 Further connections.44
9.5.2 Call establishment at the destination interface .44
9.5.2.1 First connection.44
9.5.2.2 Further connections.45
9.5.3 Call clearing.46
9.5.4 In-band tones and announcements .46
9.5.5 Restart procedures .46
9.5.6 Call rearrangements .46
9.5.7 Call collisions .46
9.5.8 Handling of error conditions.46
9.5.9 User notification procedure .47
9.5.10 Basic telecommunication service identification and selection .47
9.5.11 Signalling procedures for bearer capability selection .47
9.5.12 Signalling procedures for high layer compatibility selection.47
9.5.13 Status request procedures.47
9.6 Procedures for interworking with private ISDNs .47
9.6.1 First connection .48
9.6.2 Further connections.49
9.7 Interactions with other networks.49
9.8 Parameter values (timers) .49
9.9 Dynamic description (SDL diagrams) .49
Annex A (informative): Signalling flows for the telephony 7 kHz teleservice.50
Annex B (informative): Signalling flows for the videotelephony teleservice.53
Annex C (informative): Signalling flows for the audiographic conference teleservice .57
Annex D (informative): Signalling flows for the videoconference teleservice.61
Annex E (informative): Identification of changes from previous standards.65
E.1 Identification of changes from ETS 300 267-1 to its amendment A1 .65
E.2 Identification of changes from ETS 300 267-1 including amendment A1 to the present document.66
E.3 Identification of changes from EN 300 267-1 V1.2.2 to the present document .67
Bibliography.68
History.69
ETSI
6 ETSI EN 300 267-1 V1.3.2 (2000-05)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect
of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server
(http://www.etsi.org/ipr).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in SR 000 314 (or the updates on the ETSI Web server)
which are, or may be, or may become, essential to the present document.
Foreword
This European Standard (Telecommunications series) has been produced by ETSI Technical Committee Services and
Protocols for Advanced Networks (SPAN).
The present document is part 1 of a multi-part EN covering the Integrated Services Digital Network (ISDN); Telephony
7 kHz, videotelephony, audiographic conference and videoconference teleservices; Digital Subscriber Signalling System
No. one (DSS1) protocol, as described below:
Part 1: "Protocol specification";
Part 2: "Protocol Implementation Conformance Statement (PICS) proforma specification";
Part 3: "Test Suite Structure and Test Purposes (TSS&TP) specification for the user";
Part 4: "Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT)
proforma specification for the user";
Part 5: "Test Suite Structure and Test Purposes (TSS&TP) specification for the network";
Part 6: "Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT)
proforma specification for the network".
Information in the present document concerning usage of the in-band protocol has been prepared in association with
ETSI Technical Committee Terminal Equipment (TE); such information is outside the scope of Technical Committee
Signalling Protocol and Switching (SPS) but has been included here to improve the presentation for implementors.
In accordance with CCITT Recommendation I.130 [5], the following three level structure is used to describe the
telecommunication services as provided by European public telecommunications operators under the pan-European
ISDN:
- stage 1: is an overall service description, from the user's standpoint;
- stage 2: identifies the functional capabilities and information flows needed to support the service described in
stage 1; and;
- stage 3: defines the signalling system protocols and switching functions needed to implement the service
described in stage 1.
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7 ETSI EN 300 267-1 V1.3.2 (2000-05)
The present document details the stage 3 aspects (DSS1 protocol) needed to support the telephony 7 kHz,
videotelephony, audiographic conference and videoconference teleservices.
The telephony 7 kHz stage 1 and stage 2 aspects are detailed in ETS 300 263 [18] and ETS 300 265 [20], respectively.
The videotelephony stage 1 and stage 2 aspects are detailed in ETS 300 264 [19] and ETS 300 266 [21], respectively.
The audiographic conference stage 1 aspects are detailed in ETS 300 675 [27].
The videoconference stage 1 aspects are detailed in ETS 300 678 [28].
The present document is an extended and updated version of ETS 300 267-1 [22] and its amendment A1
(ETS 300 267-1 Amendment 1 [23]). Annex E identifies relevant differences between the present document and these
standards.
National transposition dates
Date of adoption of this EN: 28 April 2000
Date of latest announcement of this EN (doa): 31 July 2000
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 January 2001
Date of withdrawal of any conflicting National Standard (dow): 31 January 2001
ETSI
8 ETSI EN 300 267-1 V1.3.2 (2000-05)
1 Scope
The present document specifies the stage three of the videotelephony, telephony 7 kHz, audiographic conference and
videoconference teleservices for the pan-European Integrated Services Digital Network (ISDN) as provided by
European public telecommunications operators at the T reference point or coincident S and T reference point (as defined
in ITU-T Recommendation I.411 [6]) by means of the Digital Subscriber Signalling System No. one (DSS1) protocol.
Stage three identifies the protocol procedures and switching functions needed to support a telecommunication service
(see CCITT Recommendation I.130 [5]).
In addition, the present document specifies the protocol requirements at the T reference point where the service is
provided to the user via a private ISDN.
The present document does not specify the additional protocol requirements where the service is provided to the user via
a telecommunication network that is not an ISDN.
For the telephony 7 kHz, videotelephony, audiographic conference and videoconference teleservices, the present
document specifies procedures for commencement of the in-band protocol by normative reference to the relevant
in-band protocol ETSs.
The present document also specifies additional procedures to those required to support basic call in EN 300 403-1 [25]
in order to support the four teleservices described in the present document. These additional procedures may be used to
support other basic telecommunication services.
The telephony 7 kHz teleservice is a real-time teleservice in which speech (7 kHz or 3,1 kHz bandwidth) can be
interchanged using one circuit-mode 64 kbit/s connection.
The videotelephony teleservice is a real-time, audiovisual teleservice in which speech and moving pictures are
interchanged by means of one or two 64 kbit/s circuit-mode connections in the ISDN. The picture information
transmitted is sufficient for adequate representation of fluid movements of a person displayed in head and shoulders
view.
The audiographic conference teleservice is a real-time teleservice in which high quality speech, control signals and data
are interchanged using one or more circuit-mode 64 kbit/s connection(s).
The videoconference teleservice is a real-time teleservice in which high quality audio, video, control signals and data are
interchanged using two or more circuit-mode 64 kbit/s connections.
Procedures for the correlation of independent connections within the same videotelephony, audiographic conference or
videoconference calls are outside the scope of the present document. This places responsibility on the user of this
service to avoid situations where certain supplementary services are being used, and also situations where multiple calls
are being presented to the same user at the same time.
Further parts of the present document specify the method of testing required to identify conformance to the present
document.
The present document is applicable to equipment supporting the videotelephony, telephony 7 kHz, audiographic
conference and videoconference teleservices, to be attached at either side of a T reference point or coincident S and
T reference point when used as an access to the public ISDN.
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9 ETSI EN 300 267-1 V1.3.2 (2000-05)
2 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
• References are either specific (identified by date of publication, edition number, version number, etc.) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• For a non-specific reference, the latest version applies.
• A non-specific reference to an ETS shall also be taken to refer to later versions published as an EN with the same
number.
[1] CCITT Recommendation G.711 (1988): "Pulse code modulation (PCM) of voice frequencies".
[2] ITU-T Recommendation H.221 (1993): "Frame structure for a 64 to 1 920 kbit/s channel in
audiovisual teleservices".
[3] ITU-T Recommendation H.242 (1993): "System for establishing communication between
audiovisual terminals using digital channels up to 2 Mbit/s".
[4] ITU-T Recommendation I.112 (1993): "Vocabulary of terms for ISDNs".
[5] CCITT Recommendation I.130 (1988): "Method for the characterization of telecommunication
services supported by an ISDN and network capabilities of an ISDN".
[6] ITU-T Recommendation I.411 (1993): "ISDN user-network interfaces - Reference configurations".
[7] CCITT Recommendation Q.9 (1988): "Vocabulary of switching and signalling terms".
[8] ETSI ETS 300 082: "Integrated Services Digital Network (ISDN); 3,1 kHz telephony teleservice;
End-to-end compatibility".
[9] ETSI ETS 300 092-1: "Integrated Services Digital Network (ISDN); Calling Line Identification
Presentation (CLIP) supplementary service; Digital Subscriber Signalling System No. one (DSS1)
protocol; Part 1: Protocol specification".
[10] ETSI ETS 300 097-1: "Integrated Services Digital Network (ISDN); Connected Line Identification
Presentation (COLP) supplementary service; Digital Subscriber Signalling System No. one (DSS1)
protocol; Part 1: Protocol specification".
[11] ETSI ETS 300 102-1: "Integrated Services Digital Network (ISDN); User-network interface
layer 3; Specifications for basic call control".
[12] ETSI ETS 300 143: "Integrated Services Digital Network (ISDN); Audiovisual services Inband
signalling procedures for audiovisual terminals using digital channels up to 2 048 kbit/s".
[13] ETSI ETS 300 144: "Integrated Services Digital Network (ISDN); Audiovisual services; Frame
structure for a 64 kbit/s to 1 920 kbit/s channel and associated syntax for inband signalling".
[14] ETSI ETS 300 145: "Integrated Services Digital Network (ISDN); Audiovisual services;
Videotelephone systems and terminal equipment operating on one or two 64 kbit/s channels".
[15] ETSI EN 300 196-1 (V1.2): "Integrated Services Digital Network (ISDN); Generic functional
protocol for the support of supplementary services; Digital Subscriber Signalling System No. one
(DSS1) protocol; Part 1: Protocol specification".
[16] ETSI I-ETS 300 245-2: "Integrated Services Digital Network (ISDN); Technical characteristics of
telephony terminals; Part 2: PCM A-law handset telephony".
[17] ETSI I-ETS 300 245-5: "Integrated Services Digital Network (ISDN); Technical characteristics of
telephony terminals; Part 5: Wideband (7 kHz) handset telephony".
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10 ETSI EN 300 267-1 V1.3.2 (2000-05)
[18] ETSI ETS 300 263: "Integrated Services Digital Network (ISDN); Telephony 7 kHz teleservice;
Service description".
[19] ETSI ETS 300 264: "Integrated Services Digital Network (ISDN); Videotelephony teleservice;
Service description".
[20] ETSI ETS 300 265: "Integrated Services Digital Network (ISDN); Telephony 7 kHz teleservice;
Functional capabilities and information flows".
[21] ETSI ETS 300 266: "Integrated Services Digital Network (ISDN); Videotelephony teleservice;
Functional capabilities and information flows".
[22] ETSI ETS 300 267-1: "Integrated Services Digital Network (ISDN); Telephony 7 kHz and
videotelephony teleservices; Digital Subscriber Signalling System No. one (DSS1) protocol;
Part 1: Protocol specification".
[23] ETSI ETS 300 267-1 Amendment 1: "Integrated Services Digital Network (ISDN); Telephony
7 kHz and videotelephony teleservices; Digital Subscriber Signalling System No. one (DSS1)
protocol; Part 1: Protocol specification".
[24] ETSI I-ETS 300 281: "Integrated Services Digital Network (ISDN); Telephony 7 kHz teleservice;
Terminal requirements necessary for end-to-end compatibility".
[25] ETSI EN 300 403-1 (V1.2): "Integrated Services Digital Network (ISDN); Digital Subscriber
Signalling System No. one (DSS1) protocol; Signalling network layer for circuit-mode basic call
control; Part 1: Protocol specification [ITU-T Recommendation Q.931 (1993), modified]".
[26] ETSI ETS 300 403-2: "Integrated Services Digital Network (ISDN); Digital Subscriber Signalling
System No. one (DSS1) protocol; Signalling network layer for circuit-mode basic call control;
Part 2: Specification and Description Language (SDL) diagrams".
[27] ETSI ETS 300 675: "Integrated Services Digital Network (ISDN); Audiographic conference
teleservice; Service description".
[28] ETSI ETS 300 678: "Integrated Services Digital Network (ISDN); Videoconference teleservice;
Service description".
[29] ETSI EN 300 267-1 (V1.2): "Integrated Services Digital Network (ISDN); Telephony 7 kHz,
videotelephony, audiographic conference and videoconference teleservices; Digital Subscriber
Signalling System No. one (DSS1) protocol; Part 1: Protocol specification".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply.
basic telecommunication service: telecommunication service that is either a teleservice or a bearer service
bearer capability: type of transmission media provided by the network, and thus the type of the overall connection, and
also the set of lower layer protocols required on the connection
bearer service: see ITU-T Recommendation I.112 [4], definition 202
bearer: association of transmission channels or circuits, and switching, set up to provide a means for transfer of
information between two or more points in a telecommunication network. It does not include control signalling
call control message: message as defined in EN 300 403-1 [25], subclause 3.1, which on sending or receipt causes a
change of the call state at either the network or the user. A call control message thus indicates or causes a change in the
state of the bearer. Call control messages also include the INFORMATION message and PROGRESS message
ETSI
11 ETSI EN 300 267-1 V1.3.2 (2000-05)
call reference: identifier of a signalling transaction. The signalling transaction may either be bearer related, in which
case the signalling transaction can be used to control that bearer, or bearer independent, in which case there is no bearer
associated with that signalling transaction. Where there is only one bearer required for a call, then the call reference of
the associated bearer-related signalling transaction may be used to identify the call
call state: state as defined in EN 300 403-1 [25] subclause 2.1 for either the user or the network as appropriate. A call
state may exist for each call reference value (and for each additional responding CEI in the incoming call states). This
represents the state of a state machine associated with a bearer-related or bearer-independent signalling transaction. For
a bearer-related signalling transaction the call state also identifies the condition of the associated bearer, and where a
call consists of only one bearer, may also identify the condition of the call
call: see CCITT Recommendation Q.9 [7], definition 2201
connection type: see ITU-T Recommendation I.112 [4], definition 316
connection: see CCITT Recommendation Q.9 [7], definition 0011. In the present document the use of this term is taken
to include a bearer and its associated control signalling
data link connection endpoint identifier: Connection Endpoint Identifier (CEI): identifier used by a layer 3
protocol entity to address its peer entity
fallback: mechanism for selecting, at the time of call request and establishment, an alternative bearer capability, or high
layer compatibility, to that primarily requested by the calling user. Fallback may occur either due to the network being
unable to provide the primarily requested bearer capability, or high layer compatibility, or due to the called user desiring
an alternative bearer capability, or high layer compatibility
high layer compatibility: set of higher layer protocols required for the call; this information may also be used to define
the basic telecommunication service as a particular teleservice
in-band protocol entity: protocol entity within the terminal responsible for the provision of the in-band procedures
(e.g. I-ETS 300 245-2 [16], ETS 300 143 [12], I-ETS 300 245-5 [17])
Integrated Services Digital Network (ISDN): see ITU-T Recommendation I.112 [4], definition 308
network: DSS1 protocol entity at the network side of the user-network interface
service; telecommunication service: see ITU-T Recommendation I.112 [4], definition 201
teleservice: see ITU-T Recommendation I.112 [4], definition 203
user: DSS1 protocol entity at the user side of the user-network interface
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
CEI Connection Endpoint Identifier
DSS1 Digital Subscriber Signalling System No. one
ISDN Integrated Services Digital Network
PSTN Public Switched Telephone Network
SDL Specification and Description Language
ETSI
12 ETSI EN 300 267-1 V1.3.2 (2000-05)
4Void
5 Additional generic requirements for basic
telecommunication services not defined in
EN 300 403-1
...