SIST-V ETSI/EG 201 807 V1.1.1:2003
(Main)Network Aspects (NA) - Intelligent Network (IN) - Network operators' requirements for the delivery of service provider access
Network Aspects (NA) - Intelligent Network (IN) - Network operators' requirements for the delivery of service provider access
This document specifies the requirements that network operators have in delivering special accesses to service providers, mainly in the field of (but not necessarily restricted to) network integrity. This work item follows on from DEG/NA-061601, adopting an equivalent scope (enhanced telephony services only). Service interaction and application to other types of network will be considered in a subsequent work item. Reference documents: NA-061209, NA-061208, NA-061205, NA-061204, NA-061601, ECTRA report on Special Network Access, ECTRA report on Network Integrity, ETP report on CLI.
Omrežni vidiki (NA) - Inteligentno omrežje (IN) - Zahteve omrežnega operaterja za zagotovitev dostopa ponudniku storitve
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST-V ETSI/EG 201 807 V1.1.1:2003
01-november-2003
Omrežni vidiki (NA) - Inteligentno omrežje (IN) - Zahteve omrežnega operaterja za
zagotovitev dostopa ponudniku storitve
Network Aspects (NA) - Intelligent Network (IN) - Network operators' requirements for the
delivery of service provider access
Ta slovenski standard je istoveten z: EG 201 807 Version 1.1.1
ICS:
33.040.35 Telefonska omrežja Telephone networks
SIST-V ETSI/EG 201 807 V1.1.1:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST-V ETSI/EG 201 807 V1.1.1:2003
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SIST-V ETSI/EG 201 807 V1.1.1:2003
ETSI EG 201 807 V1.1.1 (2000-09)
ETSI Guide
Network Aspects (NA);
Intelligent Network (IN);
Network operators' requirements
for the delivery of service provider access
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2 ETSI EG 201 807 V1.1.1 (2000-09)
Reference
DEG/SPAN-061603
Keywords
access, NNI, protocol, regulation, service, UNI
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All rights reserved.
ETSI
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Contents
Intellectual property rights.5
Foreword.5
1 Scope .6
2 References .6
3 Definitions and abbreviations.7
3.1 Definitions.7
3.2 Abbreviations .7
4 Introduction .8
4.1 General .8
4.2 Regulatory aspects.8
4.3 Network integrity aspects.9
4.4 Security aspects .9
4.5 Charging aspects .10
4.6 Guidelines for the service provider access requirements.10
5 Functional requirements for service provider access .10
5.1 Introduction .10
5.2 Calling party information handling requirements.10
5.2.1 Relaying of the malicious call identification data of a received call.11
5.2.1.1 Priority .11
5.2.1.2 Example of usage .11
5.2.1.3 Technical aspects .11
5.2.1.4 Information flow chart .11
5.2.2 Application of the CLIR supplementary service.12
5.2.2.1 Priority .12
5.2.2.2 Example of usage .12
5.2.2.3 Technical aspects .12
5.2.2.4 Information flow chart .13
5.3 Basic call set-up and clear-down requirements .13
5.3.1 Reception of the originally dialled digits.13
5.3.1.1 Priority .13
5.3.1.2 Example of usage .13
5.3.1.3 Technical aspects .14
5.3.1.4 Information flow chart .14
5.3.2 Alternate routing of a call or the indication of a call to another "point of presence" of the SP .14
5.3.2.1 Priority .14
5.3.2.2 Example of usage .15
5.3.2.3 Technical aspects .15
5.3.2.4 Information flow chart .15
5.4 Traffic-related and monitoring requirements.15
5.4.1 Event traceability .15
5.4.1.1 Priority .15
5.4.1.2 Example of usage .15
5.4.1.3 Technical aspects .15
5.4.1.4 Information flow chart .15
5.4.2 Traffic control.16
5.4.2.1 Priority .16
5.4.2.2 Example of usage .16
5.4.2.3 Technical aspects .16
5.4.2.4 Information flow chart .16
5.4.3 Avoidance of the cyclical routing of a call .16
5.4.3.1 Priority .16
5.4.3.2 Example of usage .17
5.4.3.3 Technical aspects .17
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5.5 Miscellaneous requirements .17
5.5.1 Application contents screening.17
5.5.1.1 Priority .17
5.5.1.2 Example of usage .17
5.5.1.3 Technical details .17
5.5.2 Charging mechanisms between SP and PTNO .18
5.5.2.1 Priority .18
5.5.2.2 Example of usage .18
5.5.2.3 Technical aspects .18
Bibliography.19
History .20
ETSI
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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 ETSI 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 ETSI 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 ETSI Guide (EG) has been produced by ETSI Technical Committee Services and Protocols for Advanced
Networks (SPAN).
ETSI
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1 Scope
The present document lists the first set of requirements that public network operators have for the delivery of service
provider access. These requirements are intended to facilitate a non-discriminatory access to public telecommunication
networks for service providers.
The present document does not fully take into account the service capability requirements from a service provider's
perspective, these aspects are defined in EG 201 722 [7]. The two documents EG 201 722 [7] and the present document
should not be considered separately for implementation.
The scope of the present document is to present generic functional requirements regarding the service provider access.
The priority of each requirement is based on the need perceived from the public network operator´s viewpoint. Service
interaction aspects are outside the scope of the present document. To fulfil these requirements, appropriate protocols
and/or provisions may have to be developed taking into account network integrity, security, charging, and other
considerations expressed in the present document.
Clause 4 contains introductory text describing the background and motivations of the requirements of service provider
access. Clause 5 contains a description of the functional requirements of the service provider access interface. These
requirements need to be considered additional to the requirements specified in EG 201 722 [7].
The present document relates to the role of the service provider and the role of the public telecommunications network
operator, with the realization that market players may act in multiple roles. This is in alignment with the current
European legislation, which specifies that all capabilities utilized by a significant market power network operator's
internal service provisional body, shall also be offered on equal terms to external entities.
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.
th
[1] CEPT/ECTRA Recommendation on network integrity, Rec(98)01, 12 May 1998.
th
[2] Directive 98/10/EC of the European Parliament and Council of 26 February 1998 on the
application of Open Network Provisions to voice telephony and on universal service for
telecommunications in a competitive environment.
th
[3] Directive 97/33/EC of the European Parliament and Council of 30 June 1997 on interconnection
in telecommunications with regard to ensuring universal service and interoperability through the
application of Open Network Provisions.
[4] ETSI ETR 322: "Intelligent Network (IN); Vocabulary of terms and abbreviations for CS-1 and
CS-2".
[5] ETSI ETS 300 128 (1992): "Integrated Services Digital Network (ISDN), Malicious Call
Identification (MCID) supplementary service; Service description".
[6] ETSI ES 201 158: "Telecommunications Security; Lawful Interception (LI); Requirements for
network functions".
[7] ETSI EG 201 722: "Intelligent Network (IN); Service provider access requirements; Enhanced
telephony services".
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[8] ETSI EG 201 781: "Intelligent Network (IN); Lawful interception".
3 Definitions and abbreviations
3.1 Definitions
For the purpose of the present document, the following terms and definitions apply:
firewall: means of preventing external parties from directly accessing internal network resources. All signalling to
internal network resources are directed via an entity dedicated to that purpose.
mapping: systematic way of converting messages from one signalling system to messages of another signalling system.
public telecommunications network: telecommunications network which provides telecommunications services to the
general public [4].
public telecommunications network operator: entity which is responsible for the development, provisioning and
maintenance of telecommunications services to the general public and for operating the corresponding networks [4].
public telecommunications network originating: PTN to which either the originating line is directly connected or in
which an incoming call initiates a service.
public telecommunications network terminating: PTN to which either the terminating line is directly connected or in
which the terminating line's user profile is stored.
screening: process involving intercepting signalling messages to check their contents before allowing them to continue,
or rejecting them.
service provider: entity which provides services to its service subscribers on a contractual basis and who is responsible
for the services offered. The same organization may act as a public telecommunications network operator and a service
provider [4].
service provider originating: service provider that provides either services relating to the originating line (or to the
originating profile), or services acting on the information coming from the originating or incoming call.
service provider terminating: service provider that provides either services relating to the terminating line (or to the
terminating profile), or services acting on the call-related information coming from the terminating party's line.
service provider access: access facility that enables a service provider to access specific functionality of a public
telecommunications network.
service provider access interface: interface between a public telecommunications network and a service provider´s
equipment for enabling the service provider to access specific functionality of a public telecommunications network.
service provider access requirement: requirement for a service provider´s access to specific functionality of a public
telecommunications network.
special network access: access at network termination points other than the more commonly provided network
termination points, such as the conventional user-network interfaces (see Directive 98/10/EC [2]).
3.2 Abbreviations
For the purpose of the present document, the following abbreviations apply:
CdPy Called Party
CgPy Calling Party
CLI Calling Line Identity
EC European Community
ECTRA European Committee for Telecommunications Regulatory Affairs
ETP European Telecommunications Platform
ETSI European Telecommunications Standards Institute
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ISDN Integrated Services Digital Network
NRA National Regulatory Authority
NTP Network Terminating Point
PTN Public Telecommunications Network
PTNO Public Telecommunications Network Operator
PTNorig originating Public Telecommunications Network
PTNterm terminating Public Telecommunications Network
SP Service Provider
SPorig Service Provider originating
SPterm Service Provider terminating
SPA Service Provider Access
SPAR Service Provider Access Requirements
UNI User-Network Interface
4 Introduction
4.1 General
The aim of the present document is to define the requirements that need to be met when service providers wish to access
functionality in the public telecommunication networks of PTNOs. Such requirements will generally apply to the
interface between the PTNO and the SP. In EG 201 722 [7] the functional requirements which apply to this access
interface from the perspective of service providers are specified.
The requirements in EG 201 722 [7] however do not adequately take into account the network integrity, charging or
other aspects from a PTNO's perspective, that nevertheless needs to be clearly specified if the PTNO is to provide
reliable and secure network access to the service provider. These technical conditions would in most cases be applicable
to both the PTNO and the SP but there are clearly instances when the requirements may have to be given special and
different treatment by the PTNO.
It is therefore important to ensure that the functional specifications defined in EG 201 722 [7] fully respect the technical
criterion applicable to integrity, charging, and other key aspects that are of vital importance to both PTNOs and SPs.
The requirements defined in the present document are from a PTNO's perspective and should therefore be read in
conjunction with EG 201 722 [7].
4.2 Regulatory aspects
The present document outlines the current regulatory criterion which is applicable to service providers requesting
"special network access" from the PTNO. These criteria primarily emanate from Article 16 of the Voice Telephony
directive (see Directive 98/10/EC [2]) that places obligations on "significant market power" organizations to respond to
"reasonable requests" for special network access.
Hence all NRAs in EU countries will be under an obligation to implement in national regulation the requirements of the
EU directives and this means PTNOs nominated as having significant market power will need to comply with special
network access requirements. It will be a matter for NRAs in each country to decide if they wish to go further and apply
the EU requirements to "non-significant market power" organizations but there are clearly no obligations for member
states to take these steps.
There are requirements in the directive to ensure that network integrity is fully respected and this means that both public
telecommunication network operators and service providers will need to ensure that network integrity requirements are
incorporated in their network facilities. The European Committee for Telecommunications Regulatory Affairs
(ECTRA) recommendations on network integrity (see CEPT/ECTRA Recommendation (98)01 [1]) and the European
Telecommunications Platform (ETP) guideline report on network integrity (see ETP guidline in Bibliography) outline
broad regulatory and operational aspects of network integrity and are relevant to the present document.
Hence from the regulatory perspective PTNOs designated as operators having significant market power will be required
to respond to "reasonable requests" for special network access. Those organizations designated, as having significant
market power, shall in accordance with Article 16 of the Voice Telephony Directive adhere to the principle of non-
discrimination (see Directives 98/10/EC [2] and 97/33/EC [3]). It will be a matter for both PTNO and SP to agree on
what network services can be made available via special network access and whether such services are technically and
economically feasible subject to regulatory oversight by the NRA.
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The technical requirements of legal interception will need to accord with the specific regulations on security and
interception that are in force in the respective countries (see EG 201 781 [8] and ES 201 158 [6]).
PTNOs willing to operate in one or more countries have to comply with the specific regulatory requirements of the
NRAs of those countries. PTNOs are obliged to support the numbers being allocated to SPs by the NRA responsible for
the respective country for the provision of the specific services offered by the SPs in that country.
4.3 Network integrity aspects
Network integrity is a question of network management and the ability of the network to maintain certain characteristics
with regard to performance and reliability.
Network integrity is a key issue when a network relationship is established between the PTN and the SP. The opening
of the PTNO's networks to the SP involves the broadening of access to stored data/information. Data shall be
adequately protected by use of passwords and partitioning, so that the integrity and privacy is not compromised.
Network integrity also involves ensuring the integrity of the network elements and providing an acceptable level of
service. Vulnerabilities associated with system integrity may result in service denial or disruption, or the unauthorized
modification of user or network information and network services.
The evolution of the PTNO's networks needed to support the enhanced services of the SPs creates the need for planning
the growth of real time switch capacity in concert with the emergence of this new access service. In order to cope with
this issue, PTNOs and SPs should negotiate traffic engineering aspects to ensure that adequate network capacity is
available. If PTNOs and SPs do not adequately plan for increase capacity the public network will be vulnerable to
disruption and denial of service problems.
The following aspects should be considered:
- A gateway function between the PTN and the SP, specially the charging/billing messages and their parameters.
- The protection mechanism in order to ensure that the SPs do not affect in a negative way the services provided in
the PTN.
- The authentication/ciphering mechanisms to protect the PTN from the vulnerabilities due to the Service Provider
access.
On the other hand, in order to maintain network integrity, the following requirements exist:
- Compatibility measures should ensure that networks and the SPs with different levels of performance work
together correctly.
- Mechanisms to support conformance testing procedures should exist in order to verify PTN and SP
interoperability.
- Service Provider access increases the potential for vulnerabilities associated with feature interaction problems in
case there is no sufficient level of expertise to deal with this problem. Feature interaction could disrupt a needed
service or be targeted for intentional abuse by computer intruders. Appropriate measures should be implemented
to avoid this kind of risks.
The range of services offered by SPs is likely to lead to different interface types used for SPA. These different types of
interfaces may require different sets of functionalities within the gateway at the network boundary.
4.4 Security aspects
Security aspects of the SPA are briefly described in EG 201 722 [7].
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4.5 Charging aspects
The standard charging mechanisms allow the charging of a successful call, e.g. between the called party's answer and
the release of the call.
Some requirements from service providers imply the usage of the PTNO's network outside this standard case, and the
implementation of a related charging mechanism between the PTNO and the SP is therefore necessary, in order to cover
such a usage.
This is for instance the case for the following SP's requirements, included in EG 201 722 [7]:
- requesting the opening of a backward in-band message path to the original calling party immediately upon the
arrival of a confirmation of the call set-up, without returning an "answer" signal;
- conveying an indication of an unsuccessful call from the terminating PTN, i.e. either when an indication other
than "ringing' is returned to the calling party, or when a no reply situation occurs;
- providing call destination and routing information for controlling the destination and routing of the call;
- interacting with the end user before any service charging begins;
- sending data to and receiving data from of the service user's NTP without an alert signal, such as a ringing.
National and European legislation and regulations, where appropriate, need to be taken into account when charging
mechanisms are designed and implemented, e.g. to provide advice of charge to a service user.
4.6 Guidelines for the service provider access requirements
In the s
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