Overview
SIST EN 301 820 V1.1.1:2005 defines the inter-exchange signalling protocol for the Common Information Additional Network Feature (ANF) within Private Integrated Services Networks (PISN). Developed by SIST and identical to EN 301 820, this standard modifies and references ISO/IEC 15772:1998 for European and international harmonization. It forms part of the broader series of standards for PISN, ensuring reliable communication between network exchanges through structured protocol specifications. The document specifies stage 3 (protocol) aspects necessary for implementing the Common Information ANF, aligning with the ISDN concepts and Open Systems Interconnection (OSI) standards.
Key Topics
- Private Integrated Services Network (PISN): Framework for private telecommunication networks supporting integrated services, leveraging ISDN concepts.
- Inter-exchange Signalling Protocol: Standardizes the communication between separate network exchanges, enabling seamless feature interaction.
- Common Information ANF: Describes the handling and transfer of common information between exchanges to support advanced network features.
- QSIG Protocol: Utilizes the Q reference point for signalling, also known as Private integrated Signalling System no.1 (PSS1).
- Stage 3 (Protocol) Description: Details the protocol mechanisms, message flows, and procedures necessary for network implementation.
Applications
SIST EN 301 820 V1.1.1:2005 is vital in telecommunications environments where separate network exchanges must communicate complex service information. Practical applications include:
- Enterprise Telephony: Facilitates advanced call features and supplementary services in large organizations with distributed PISN infrastructures.
- Service Provider Networks: Ensures interoperable signalling between different network vendor solutions, supporting users' mobility and feature consistency.
- Integration with Public Networks: Aligns PISN functions with public network ISDN standards, improving compatibility and extending service reach.
- Feature-Rich PBX Networks: Supports additional network features such as call forwarding, interception, and diversion, ensuring efficient enterprise communications.
- Seamless Network Expansion: Enables the addition of new locations and services without disrupting existing operations, thanks to standardized protocols.
Related Standards
The standard references and works in conjunction with several key standards to ensure comprehensive network interoperability and feature support:
- EN 301 819: Specification, functional models, and information flows for Common Information ANF [ISO/IEC 15771, modified].
- EN 300 172: Inter-exchange signalling protocol for circuit-mode basic services [ISO/IEC 11572, modified].
- ETS 300 239: Generic functional protocol for supplementary services support [ISO/IEC 11582, modified].
- ETS 300 257: Signalling protocol for diversion supplementary services [ISO/IEC 13873, modified].
- EN 301 265: Protocol for call interception ANF [ISO/IEC 15054, modified].
- ETS 300 475-1: Reference configurations for private telecommunication network exchanges [ISO/IEC 11579-1, modified].
These related standards further enhance compatibility and functional richness in PISN implementations, supporting a wide range of telecommunications requirements.
Keywords: PISN, ANF, inter-exchange signalling, QSIG, private network protocol, supplementary services, telecommunication standards, ISDN, stage 3 protocol, enterprise PBX, common information feature.