SIST EN 302 097 V1.2.2:2005

Overview

SIST EN 302 097 V1.2.2:2005 defines protocol enhancements for the Integrated Services Digital Network (ISDN) Signalling System No.7 (SS7) ISDN User Part (ISUP), specifically aimed at supporting Number Portability (NP). Rooted in the European standard EN 302 097 and aligned with ITU-T Recommendation Q.769.1 (2000), this document outlines the requirements and modifications necessary for implementing number portability in telecommunications networks. Developed by SIST and based on collaborative input from leading industry organizations, its goal is to facilitate seamless number portability across different service providers and national boundaries.

Key Topics

• Number Portability Support: Enhancements to SS7 ISUP protocols to allow for subscriber numbers to be retained across different networks or service providers.
• ISUP Procedures: Specification of how call control signalling is adapted to efficiently support number portability, maintaining interoperability and call integrity.
• Modifications to International Recommendations: Modifications and clarifications to ITU-T Q.769.1 are documented, making the European implementation tailored to specific regional needs.
• Interworking between Networks: Ensures that information related to number porting is correctly communicated between different network operators.

Applications

The enhancements detailed in SIST EN 302 097 V1.2.2:2005 have practical application in several telecommunications scenarios:

• Service Provider Portability: Allows telephone customers to change service providers without changing their telephone numbers, providing greater consumer choice and stimulating competition.
• Network Modernization: Facilitates network upgrades and operator changes with minimal impact on the customer’s experience.
• National and International Portability: The standard supports mechanisms for both national portability within a country and international number portability across borders where agreements exist.
• Regulatory Compliance: Helps telecommunication service providers comply with national and international regulations regarding customer rights to retain their phone numbers.

Typical adopters include telecommunication operators, equipment vendors, and network integrators who are responsible for implementing, managing, or upgrading public switched telephone networks (PSTNs) or mobile networks to support number portability requirements.

Related Standards

For comprehensive and interoperable implementations, the following related standards and references should be considered:

• ITU-T Recommendation Q.769.1 (2000): The foundational international specification for ISUP enhancements for number portability.
• ETSI EN 300 356-1: ISUP version 4 for the international interface, covering basic services.
• ETSI EN 300 356-2: ISUP version 4 for the international interface, covering supplementary services.
• ETSI TR 101 119: Network aspects of number portability, including high-level descriptions.
• ETSI TR 101 118: Network architecture and solutions supporting number portability.
• ETSI TR 101 122: Numbering and addressing for number portability.
• ETSI EG 201 367: Intelligent Network support for service provider number portability.

These standards, when used in conjunction with SIST EN 302 097 V1.2.2:2005, ensure robust, scalable, and interoperable support for number portability across diverse telecommunications environments.

Keywords: ISDN, SS7, ISUP, Number Portability, telecommunications standards, signalling protocol, network interoperability, EN 302 097, SIST, ITU-T Q.769.1, service provider portability, regulatory compliance.