SIST EN 301 160 V1.1.1:2005

• Abstract:

  Standardize, based on DTR/NA-021410, the short and medium term routein g alternatives for handling a calls using pan-European numbering schem

• Status: Published
• Publication Date: 31-Mar-2005
• ICS: 33.040.35 - Telephone networks
• 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 301 160 V1.1.1 (1998-10) - Routeing of calls to European Telephony Numbering Space (ETNS) services

SIST EN 301 160 V1.1.1:2005 is a SIST standard identical to EN 301 160 Version 1.1.1. It specifies how calls to European Telephony Numbering Space (ETNS) services are routed, including the routeing methods, the structure of ETNS Routeing numbers, and the addressing used between networks. It is written for telecommunications operators, service providers, and numbering administrators that implement or manage ETNS call handling.

What does SIST EN 301 160 V1.1.1:2005 specify?

SIST EN 301 160 V1.1.1:2005 specifies the routeing methods for ETNS, the alternative structures of ETNS Routeing numbers, the addressing between networks, and how calls are routed within Europe, to Europe, from Europe, and transiting through Europe. The document is organized into scope, references, definitions, a reference model, routeing requirements, and two informative annexes.

Annex	What it covers
Annex A	Routeing of calls to Corporate Networks (CN), including direct routeing, single translation, and double translation
Annex B	Structures of the ETNS Routeing numbers

What are the key requirements of SIST EN 301 160 V1.1.1:2005?

Call handling model and management

Clause 4 separates ETNS into a call-related part and a non call-related management part. In practice, this means call routing and number administration are treated as different functions, even when one organization performs both.

Clause 4.1 describes a two-leg call model: first the call is translated from the European number (En) to an ETNS Routeing number (Rn), then the service is provided by the service network. This matters because operators must support both the translation step and the service delivery step.

Clause 4.2 assigns number management to the registrar, including assignment and distribution of Routeing numbers. Updates are triggered when a new En is assigned, coverage changes, a number is withdrawn, or the ETNS Service Provider changes.

Routeing methods

Clause 5.1 requires single translation or double translation, depending on the service. The serving exchange, ETNS translation database, service exchange, and ETNS SP database shall all be located in Europe for ETNS service provisioning.

Clause 5.1.1 says single translation uses one number translation during call setup, and routeing decisions are based on the called En and the Terminating number (Tn). This is the simpler model to implement when one translation step is enough.

Clause 5.1.2 describes double translation, with two implementation options. Routeing decisions use at least one of the dialled En, an ETNS Routeing number (Rn), or the Tn, and numbers crossing a boundary between two networks shall be E.164 numbers.

Routeing numbers and addressing

Clause 5.2 says ETNS Routeing numbers identify the service network and the service providers connected to it. Each service network is assigned a dedicated Rn, and a change of service network means a change of Rn.

Clause 5.3 defines two addressing methods for double translation: Rn1 identifies the called party, and Rn2 identifies ETNS service providers. It also states that direct calls to Routeing numbers shall normally be barred, and that addressing method 2 should be used as soon as the capability is available.

Calls within Europe and across Europe

Clause 5.4 covers calls within Europe, to Europe, from Europe, and transiting through Europe. A subscriber can determine the area from which calls can be received, as long as it includes at least two European countries, and networks without translation capability are treated as assisted networks that must route European numbers to a serving network they have an agreement with.

For calls to Europe and transiting through Europe, assisted networks outside Europe or in Europe route the call onward to the appropriate serving network. For calls from Europe, the routeing numbers are European national numbering resources, while the terminating numbers are non-European numbers.

What terms does SIST EN 301 160 V1.1.1:2005 define?

• ETNS - The European Telephony Numbering Space, identified by E.164 country code 388, used for ETNS services.
• European number (En) - A number out of the ETNS, used by the calling party to reach an ETNS service.
• ETNS Routeing number (Rn) - An E.164 number used to route the call to the service exchange and, in some cases, identify the called party or provider.
• Serving Network (SgN) - The network responsible for routeing a call from the calling party to the service network.
• Assisted network - A network that routes a call to an European number toward a serving network with which it has an agreement.
• service exchange - The exchange in the service network that triggers service provision on receipt of the Routeing number and then forwards the call.
• registrar - The entity responsible for day-to-day management of the ESNs behind each ESI.

Who uses SIST EN 301 160 V1.1.1:2005?

Telecommunications network operators use SIST EN 301 160 V1.1.1:2005 when they design routing logic for ETNS calls and decide how to translate European numbers into routeing numbers. ETNS Service Providers use it to understand how their service networks fit into call handling and number assignment.

Registrars and numbering administrators use it for assignment, update, and distribution processes linked to European numbers and Routeing numbers. Engineers and planners use it when defining inter-network addressing, database coordination, and routeing behavior across European and non-European networks.

Which standards are used with SIST EN 301 160 V1.1.1:2005?

Normative references

• EN 301 161 (V1.1) - Covers management of the ETNS and is used for the management procedures referenced in the ETNS reference model.
• ITU-T Recommendation E.164 - Provides the international public telecommunication numbering plan used for the number structures and routeing numbers in this document.

Informative references

• TR 101 074 (V1.1) - Background on ETNS management.
• TR 101 073 (V1.1) - Background on number portability for pan-European services.
• TR 101 079 (V1.1) - Background on routeing of calls to pan-European services using ETNS.
• ES 201 104 (V1.1) - Human factors requirements for ETNS.
• ETO Report - Background on management, routeing, and portability aspects of ETNS.

What does the SIST EN 301 160 V1.1.1:2005 document contain?

The document includes a conceptual reference model with call-related and non call-related parts, plus figures showing actors and reference points. It also contains examples of service provisioning, a comparison of single and double translation addressing, and a figure showing two possible ETNS Routeing number structures.

Annex A gives examples for Corporate Networks, including direct routeing and the use of single or double translation. Annex B shows how ETNS Routeing numbers can be structured as national specific or network specific numbers, which helps implementers plan numbering and routing databases.

SLOVENSKI STANDARD
01-april-2005
Usmerjanje klicev do storitev evropskega telefonskega številskega prostora
(ETNS)
Routeing of calls to European Telephony Numbering Space (ETNS) services
Ta slovenski standard je istoveten z: EN 301 160 Version 1.1.1
ICS:
33.040.35 Telefonska omrežja Telephone networks
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 301 160 V1.1.1 (1998-10)
European Standard (Telecommunications series)
Routeing of calls to European Telephony
Numbering Space (ETNS) services

2 EN 301 160 V1.1.1 (1998-10)
Reference
DEN/NA-021412 (aqo00ico.PDF)
Keywords
Addressing
ETSI
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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 301 160 V1.1.1 (1998-10)
Contents
Intellectual Property Rights.4
Foreword .4
1 Scope.5
2 References.5
2.1 Normative references. 5
2.2 Informative references . 5
3 Definitions, symbols and abbreviations.6
3.1 Definitions . 6
3.2 Symbols . 7
3.3 Abbreviations. 7
4 Reference model for the ETNS.8
4.1 Call-related part . 8
4.1.1 First leg: getting the ETNS Routeing number (Rn). 8
4.1.2 Second leg: providing the ETNS service. 9
4.1.3 Service provision by the Serving Network (SgN) . 9
4.2 Management part (non call-related). 9
4.2.1 European number assignment. 10
4.2.2 ETNS Routeing numbers updating. 10
5 Routeing .10
5.1 Routeing methods . 10
5.1.1 Single translation. 11
5.1.2 Double translation . 11
5.2 Structure of ETNS Routeing numbers . 12
5.3 Addressing between networks. 12
5.4 Routeing of calls . 13
5.4.1 Within Europe . 13
5.4.2 To Europe. 13
5.4.3 From Europe . 13
5.4.4 Transiting through Europe. 14
Annex A (informative): Routeing of calls to Corporate Networks (CN).15
A.1 Routeing of calls to Corporate Networks (CN) .15
A.1.1 Direct routeing . 15
A.1.2 Single and double translation. 15
Annex B (informative): Structures of the ETNS Routeing numbers .16
B.1 Structures of the ETNS Routeing numbers.16
History.17
ETSI
4 EN 301 160 V1.1.1 (1998-10)
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 Network
Aspects (NA).
National transposition dates
Date of adoption of this EN: 9 October 1998
Date of latest announcement of this EN (doa): 31 January 1999
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 July 1999
Date of withdrawal of any conflicting National Standard (dow): 31 July 1999
ETSI
5 EN 301 160 V1.1.1 (1998-10)
1 Scope
The present document specifies the routeing methods that shall be used for implementation of the European Telephony
Numbering Space (ETNS), the alternative structures of the routeing numbers , the addressing between networks and how
routeing of calls within Europe, to and from Europe and through Europe shall take place.
2 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) publications without mention of a specific version, in which case the latest version applies.
A non-specific reference to an ETS shall also be taken to refer to later versions published as a EN with the same
number.
2.1 Normative references
[1] EN 301 161 (V1.1): "Management of the European Telephony Numbering Space (ETNS)".
[2] ITU-T Recommendation E.164: "The international public telecommunication numbering plan".
2.2 Informative references
[3] TR 101 074 (V1.1): "European Numbering Task Force; Management of the European Telephony
Numbering Space (ETNS)".
[4] TR 101 073 (V1.1): "Number portability for pan-European services".
[5] TR 101 079 (V1.1): "Network Aspects (NA); Routeing of calls to pan-European services using
European Telephony Numbering Space (ETNS)".
[6] ES 201 104 (V1.1): "Human Factors (HF); Human factors requirements for a European Telephony
Numbering Space (ETNS)".
[7] ETO Report: "Management, Routeing and Portability aspects of the European Telephony
Numbering Space (ETNS)".
ETSI
6 EN 301 160 V1.1.1 (1998-10)
3 Definitions, symbols and abbreviations
3.1 Definitions
For the purposes of the present document, the following definitions apply:
administrator: The administrator has the responsibility for the high level management of the ETNS.
assisted network: A network which routes a call to an European number towards a serving network it has agreement
with in order to complete the call.
called party: An entity that terminates a call to an European number. The called party may be the ETNS subscriber to
the European number, an entity delegated by the ETNS subscriber, or a terminating equipment of the service network
(e.g. a recorded announcement equipment).
calling party: An entity that dials an European number.
ETNS country: A CEPT member country participating in the ETNS.
ETNS registrar database: The database maintained by the registrar where all data, both administrative and operational,
for each European number are registered.
ETNS routeing number: An ITU-T E.164 [2] number used to route to the service exchange. It can also identify the
called party, the ETNS service provider, and / or the originating network for routeing purposes.
ETNS service provider: An entity that provides one or more ETNS service(s) to its ETNS subscribers on a contractual
basis.
ETNS service: A service that has been assigned an ESI.
ETNS subscriber: An entity that requests a European number from a ETNS service provider in order to offer access
from a calling party to a ETNS service.
ETNS translation database: A database which, in the call process, translates the European number into a routeing
number.
ETNS: The numbering resource identified by E.164 [2] country code 388, used for the provisioning of the ETNS
services.
European number: A number out of the ETNS.
originating network: A network, either assisted or serving, to which the calling party is connected.
registrar: The registrar is responsible for the day-to-day management of the ESN’s behind each ESI.
service exchange: An exchange of the service network that triggers the provision of the service on reception of the
routeing number, and then forwards the call.
service network: A network that operates one or more service exchange(s).
serving exchange: An exchange, in the serving network, that can interrogate directly or indirectly an ETNS translation
database to obtain a routeing number related to the European number, and then forward the call.
serving network: A network, with one or more serving exchanges.
terminating number: A number containing explicit information on the terminating point of the called party. The
number is used to route towards the called party. It can be a routeing number, a European number or a geographical
number.
ETSI
7 EN 301 160 V1.1.1 (1998-10)
3.2 Symbols
For the purposes of the present document, the following symbols apply:
Calling party
Called party
Originating, transit or destination exchange
Serving exchange
Service exchange
ETNS translation database
ETNS service provider database
Combined serving and service exchange
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
CC E.164 [2] Country Code
En European number
ESI European Service Identity
ESP European Service Provider
ETNS European Telephony Numbering Space
IN Intelligent Network
INAP Intelligent Network Application Protocol
ISUP ISDN User Part
R Registrar
Rn Routeing number
RNIC Routeing Number Identification Code
SD Subsequent Digits
SgN Serving Network
SNIC Service Network Identification Code
SNPIC Service Network/Provider Identification Code
SP Service Provider
Tn Terminating number
ETSI
8 EN 301 160 V1.1.1 (1998-10)
4 Reference model for the ETNS
This subclause provides a conceptual description of the implementation of the European Telephony Numbering Space
(ETNS). Figure 1 shows the actors involved in the ETNS, and their relationship with each other. Also shown in figure 1
are the relevant reference points for the ETNS that are described in subclauses 4.1 and 4.2. Figure 1 is divided into
call-related and non call-related parts in order to clearly show the distinction between the routeing functions and the
management functions.
Management part
Admini-
Registrar
(Non call-related part) stration
Ec
D
Ed
Serving ETNS
ETNS Service
provider
network subscriber
Call-related B A
Serving Service ETNS Service
part
provider
network network
Calling
C F
party
Assisted
Terminating Called
network network party
Reference point
Figure 1: Actors and reference points
The reference points in the call-related part of figure 1 are used in the present document, while the reference points in
the non call-related part are used in EN 301 161 [1].
The ETNS Service Provider (SP) is the entity that is relevant in the process of number assignment. The service network
is the entity that is relevant in call processing. The ETNS SP and the service network may be a single entity or not; in the
latter, the entity that assumes the function of ETNS SP may or may not participate in the call process. Such a distinction
leads to recognize two concepts under the word "service provision": the function of the first is to sell a service to a
ETNS subscriber, and to be the sole interface with this ETNS subscriber, this is the role of the ETNS SP; the function of
the second is to operate the call, this is the role of the service network.
The Serving Network (SgN) is responsible for routeing a call from the calling party to the service network. The service
network participates through the service exchange in the provision of ETNS services.
European numbers are managed by an independent authority, identified as the registrar and administration in figure 1.
4.1 Call-related part
This subclause describes the principles for routeing a call from the calling party to the called party. A call to a En can be
divided in two parts.
4.1.1 First leg: getting the ETNS Routeing number (Rn)
The calling party shall dial the En in its international for
...