SIST EN 302 120 V1.1.1:2005

Overview

SIST EN 302 120 V1.1.1:2005 is the Slovenian adoption of the European standard EN 302 120, focusing on services and protocols for advanced telecommunications networks. The standard specifically addresses the operation of the Bearer Independent Call Control (BICC) protocol in conjunction with SIG.4/PNNI1.0/AINI signalling specifications as modified from the ATM Forum specification AF-CS-VMOA-0146.000 (2000). Prepared by the Slovenski inštitut za standardizacijo (SIST), this standard endorses and adapts core ATM Forum specifications for European and Slovenian telecommunications environments, ensuring compatibility and interoperability in advanced network infrastructures.

Key Topics

• Bearer Independent Call Control (BICC)
  BICC is a standardized protocol designed for call control signalling over networks that separate call control from bearer (data) transport, allowing for flexible, technology-neutral voice and multimedia service delivery.

• Signalling Integration (SIG.4/PNNI1.0/AINI)
  This standard specifies the integration of BICC with multiple signalling protocols:

  • SIG 4.0: Signalling specification facilitating communication control.
  • PNNI 1.0: Private Network-Network Interface, enabling dynamic routing in ATM networks.
  • AINI: ATM Inter-Network Interface, supporting interoperability between different ATM network domains.

• European Endorsement and Interoperability
  The document aligns the ATM Forum’s global specification with European reference frameworks, confirming applicable references and ensuring that telecom operators and equipment providers meet harmonized network requirements across Europe.

• Reference Modifications
  Updates and clarifies references to international standards, such as ITU-T Recommendations Q.1902 (BICC protocol), I.130 (service characterization), and adaptations to ISDN and signalling system standards.

Applications

SIST EN 302 120 V1.1.1:2005 is crucial for a range of telecommunications stakeholders, supporting implementation strategies in:

• Voice and Multimedia Networks
  Facilitates carrier-grade voice and multimedia services over ATM-based backbone networks by using BICC as a universal call control protocol, independent of the underlying transport technology.

• Next-Generation Networks (NGN)
  Enables seamless migration from circuit-switched to packet-switched infrastructure, allowing operators to retain existing investments while evolving to advanced, flexible network architectures.

• Interoperability between Network Elements
  Promotes standardized interconnection between different vendor equipment and network domains using SIG.4, PNNI, and AINI, helping reduce integration costs.

• Network Expansion and Service Innovation
  Supports new service deployments, network scalability, and international harmonization, making it easier for telecom providers to adapt to changing market and regulatory demands.

Related Standards

• ETSI EN 300 485: Defines ISDN cause and location signalling, referenced for harmonized call control messaging.
• ITU-T Q.1902: Key reference for BICC protocol specifications.
• ETSI EN 301 814: Provides ETSI’s adaptation of AINI signalling for ATM networks.
• ITU-T I.130: Methodology for characterizing telecommunications services supported by ISDN.
• ATM Forum AF-CS-VMOA-0146.000: Source specification for BICC-SIG.4/PNNI/AINI interworking.

Practical Value

Implementing SIST EN 302 120 V1.1.1:2005 ensures network operators and telecommunication equipment providers achieve robust, future-proof interoperability and service quality in advanced networks. By adopting European-endorsed standards, organizations benefit from proven best practices, enhanced security, and compliance with international requirements in carrier networks, enterprise infrastructures, and multi-vendor environments.