SIST EN 300 122-1 V1.2.4:2005

• Abstract:

  Update references from ETS 300 102-1 and associated I-ETSs to ETS 300 403.

• Status: Published
• Publication Date: 31-Mar-2005
• Withdrawal Date: 30-Sep-2003
• ICS: 33.080 - Integrated Services Digital Network (ISDN)
• Technical Committee: SPN - Services and Protocols for Networks
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Apr-2005
• Due Date: 01-Apr-2005
• Completion Date: 01-Apr-2005
• Ref Project: ETSI EN 300 122-1 V1.2.4 (1998-06) - Integrated Services Digital Network (ISDN); Generic keypad protocol for the support of supplementary services; Digital Subscriber Signalling System No. one (DSS1) protocol; Part 1: Protocol specification

SIST EN 300 122-1 V1.2.4:2005 is the Slovenian adoption of EN 300 122-1 Version 1.2.4 from ETSI. It specifies the ISDN generic keypad protocol for supplementary services using the DSS1 protocol, so terminal and network implementers know how keypad facility codes are sent and how network responses are handled. The document is aimed at equipment and network people working with public ISDN access at the T reference point, or coincident S and T reference point.

What does SIST EN 300 122-1 V1.2.4:2005 specify?

SIST EN 300 122-1 V1.2.4:2005 specifies the keypad protocol for supplementary services in pan-European ISDN over DSS1. It focuses on user-to-network invocation and on network-to-user indication, and it applies to both basic and primary rate access.

The standard is organised into:

• Clause 1 - Scope
• Clause 2 - Normative references
• Clause 3 - Definitions
• Clause 4 - Abbreviations
• Clause 5 - Co-existence with other supplementary service protocols
• Clause 6 - Procedures for the keypad protocol
• Clause 7 - Coding requirements
• Annex A - Example use of the keypad protocol
• Annex B - Functional reference model for the operation of supplementary services
• Annex C - Changes with respect to the previous ETS 300 122-1

Annexes A to C are informative, so they help with understanding and implementation rather than adding new requirements.

What are the key requirements of SIST EN 300 122-1 V1.2.4:2005?

SIST EN 300 122-1 V1.2.4:2005 treats the keypad protocol as a stimulus protocol. In practice, that means the user equipment sends keypad facility codes without needing to understand the supplementary service being invoked.

Protocol handling and coexistence

Clause 5 says networks may support both the keypad protocol and the functional generic protocol. The functional protocol is the default choice unless the network specifies stimulus use for certain supplementary services. This matters for procurement and integration because the supported protocol mix can depend on the network and on the access arrangement agreed at subscription time.

Clause 5 also says the protocol can differ between the local user interface and a remote user interface in the same call. For implementers, this means a network may use keypad signalling at one end and functional signalling at the other, depending on service and network policy.

Keypad protocol procedures

Clause 6 states that the keypad protocol uses the Keypad facility and Display information elements. The Keypad facility information element may appear in SETUP and INFORMATION messages, while the Display information element may be used in network-to-user messages according to EN 300 403-1. In practice, this defines where the keypad information is carried and where the user can see network feedback.

Clause 6 also says the procedures of ITU-T Recommendation Q.932 apply, with specific clarifications. The standard replaces references to Q.931 and Q.932 with the ETSI equivalents, ignores text related to the Feature key management protocol, and allows supplementary service requests for registration, cancellation, activation, deactivation or interrogation. For users and test teams, this tells you which call states and service actions are in scope.

Call establishment and information coding

Clause 6 requires that, if a Sending complete information element is used during call establishment, it shall indicate completion of the called party number. It also requires the user to send all additional call information in the Keypad facility information element before the network decides that the called party number is complete. This is important for interworking because keypad digits must arrive early enough to avoid call setup ambiguity.

Clause 7 says there are no additional messages or information elements beyond those in EN 300 403-1. That means implementation work stays aligned with the basic call signalling set rather than adding special keypad-specific coding.

What terms does SIST EN 300 122-1 V1.2.4:2005 define?

• Integrated Services Digital Network (ISDN) - The digital network context for the protocol, as defined by CCITT Recommendation I.112.
• Digital Subscriber Signalling System No. one (DSS1) - The signalling system used for the user-network protocol.
• supplementary service - A service added to basic telephony, defined by CCITT Recommendation I.210.
• stimulus protocol - A protocol where the terminal relays simple stimulus information and does not need to interpret the service itself.
• functional protocol - A protocol where the terminal performs more intelligent processing in generation or analysis of information.
• keypad facility code - A sequence of IA5 characters sent in the Keypad facility information element to control supplementary services.
• IA5 - International Alphabet No. 5, the character set used for keypad facility codes.

Who uses SIST EN 300 122-1 V1.2.4:2005?

SIST EN 300 122-1 V1.2.4:2005 is used by ISDN terminal manufacturers, network operators, and service providers that support supplementary services over DSS1. It is also used by test and conformance teams that need to verify keypad-based supplementary service invocation. Procurement and quality teams use it to check whether a product or network access supports the expected ISDN signalling behaviour at subscription and deployment time.

What changed in SIST EN 300 122-1 V1.2.4:2005 from the previous edition?

This version updates the basic call references and changes the document to EN layout. Annex C states that references to ETS 300 102 were replaced by EN 300 403, and that non-specific references to the basic standards were updated so the latest version applies when intended.

Which standards are used with SIST EN 300 122-1 V1.2.4:2005?

• CCITT Recommendation I.411 - Provides ISDN user-network interface reference configurations.
• EN 300 403-1 - Provides the DSS1 signalling network layer for circuit-mode basic call control and replaces the basic call reference used in this standard.
• ITU-T Recommendation Q.932 - Provides the generic procedures for control of ISDN supplementary services that the keypad protocol follows with clarifications.
• ITU-T Recommendation Q.931 - Provides the ISDN user-network interface layer 3 basic call control reference used within the procedure clarifications.
• CCITT Recommendation I.210 - Defines telecommunication services supported by an ISDN and the terms used for supplementary services.
• CCITT Recommendation I.112 - Provides ISDN vocabulary and the definitions used for ISDN and service terms.
• EN 300 196-1 - Provides the generic functional protocol for supplementary services, used where the keypad document points to the functional protocol reference.

What does the SIST EN 300 122-1 V1.2.4:2005 document contain?

Clause 6 contains the procedural rules for keypad-based supplementary service signalling, including how information elements are carried and how Q.932 is adapted to ETSI references. Clause 7 sets the coding boundary by stating that no extra messages or information elements are added beyond EN 300 403-1.

Annex A gives an example use of the keypad protocol, which is useful for implementers and testers checking message flow. Annex B provides a functional reference model for supplementary services, with the feature key management protocol excluded. Annex C summarises the changes from the previous ETS 300 122-1 edition, which helps readers track what this version updated.

SLOVENSKI STANDARD
01-april-2005
'LJLWDOQRRPUHåMH]LQWHJULUDQLPLVWRULWYDPL,6'1*HQHULþQL]QDNRYQLSURWRNRO
]DSRGSRURGRSROQLOQLPVWRULWYDP3URWRNROGLJLWDOQHQDURþQLãNHVLJQDOL]DFLMHãW
'66GHO6SHFLILNDFLMDSURWRNROD
Integrated Services Digital Network (ISDN); Generic keypad protocol for the support of
supplementary services; Digital Subscriber Signalling System No. one (DSS1) protocol;
Part 1: Protocol specification
Ta slovenski standard je istoveten z: EN 300 122-1 Version 1.2.4
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.

EN 300 122-1 V1.2.4 (1998-06)
European Standard (Telecommunications series)
Integrated Services Digital Network (ISDN);
Generic keypad protocol for the support of
supplementary services;
Digital Subscriber Signalling System No. one (DSS1) protocol;
Part 1: Protocol specification

2 EN 300 122-1 V1.2.4 (1998-06)
Reference
REN/SPS-05145-Y-1 (14o90iqo.PDF)
Keywords
ISDN, generic, keypad, DSS1, supplementary
service
ETSI
Postal address
F-06921 Sophia Antipolis Cedex - FRANCE
Office address
650 Route des Lucioles - Sophia Antipolis
Valbonne - FRANCE
Tel.: [phone]  Fax: [phone]
Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88
Internet
[e-mail]
http://www.etsi.fr
http://www.etsi.org
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 1998.
All rights reserved.
ETSI
3 EN 300 122-1 V1.2.4 (1998-06)
Contents
Intellectual Property Rights.4
Foreword .4
1 Scope.5
2 Normative references .5
3 Definitions.6
4 Abbreviations.6
5 Co-existence with other supplementary service protocols.6
5.1 Support of the various generic protocols . 6
5.2 Coexistence of generic protocols . 6
5.3 Arrangements by which coexistence of protocols may be supported by a network . 7
6 Procedures for the keypad protocol .7
7 Coding requirements .7
Annex A (informative): Example use of the keypad protocol .8
Annex B (informative): Functional reference model for the operation of supplementary
services.9
Annex C (informative): Changes with respect to the previous ETS 300 122-1 .10
History.11
ETSI
4 EN 300 122-1 V1.2.4 (1998-06)
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 free of charge from the ETSI Secretariat. Latest updates are available on the
ETSI Web server (http://www.etsi.fr/ipr or 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 Signalling
Protocols and Switching (SPS).
The present document is part 1 of a multi-part standard covering the Digital Subscriber Signalling System No. one
(DSS1) protocol specification for the Integrated Services Digital Network (ISDN) generic keypad protocol for the
support of supplementary services, as described below:
Part 1: "Protocol specification";
Part 2: "Protocol Implementation Conformance Statement (PICS) proforma specification".
The present version updates the references to the basic call specifications.
National transposition dates
Date of adoption of this EN: 19 June 1998
Date of latest announcement of this EN (doa): 30 September 1998
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 March 1999
Date of withdrawal of any conflicting National Standard (dow): 31 March 1999
ETSI
5 EN 300 122-1 V1.2.4 (1998-06)
1 Scope
This first part of EN 300 122 specifies the keypad protocol of the pan-European Integrated Services Digital Network
(ISDN) as provided by European public telecommunications operators for the application to a range of supplementary
services at the T reference point, or coincident S and T reference point (as defined in CCITT Recommendation
I.411 [1]), by means of the Digital Subscriber Signalling System No. one (DSS1).
The application of the present document to individual supplementary services is outside the scope of the present
document.
The keypad protocol provides a means of transferring keypad facility codes from the user to the network to control
supplementary services and indicating network responses to the user.
This protocol applies to supplementary service invocation in the user-to-network direction, and the keypad facility codes
used for the invocation of individual supplementary services are network dependent.
The protocol is stimulus in the sense that it does not require any knowledge about the invoked supplementary service by
the user equipment. It is applicable to both the basic and primary rate access structures.
Further parts of the present document may specify the method of testing required to identify conformance to the present
document.
The present document is applicable to equipment, supporting supplementary services using the keypad protocol, 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.
2 Normative references
References may be made to:
a) specific versions of publications (identified by date of publication, edition number, version number, etc.), in
which case, subsequent revisions to the referenced document do not apply; or
b) all versions up to and including the identified version (identified by "up to and including" before the version
identity); or
c) all versions subsequent to and including the identified version (identified by "onwards" following the version
identity); or
d) publicatio
...