Overview
SIST EN 301 453-1 V1.1.2:2005 specifies the Test Suite Structure and Test Purposes (TSS&TP) for call diversion supplementary services in Private Integrated Services Networks (PISN). This standard, developed by the Slovenski inštitut za standardizacijo (SIST) and harmonized with EN 301 453-1 from ETSI, aims to ensure conformance and interoperability of PISN inter-exchange signalling protocols, specifically for call diversion functionalities such as Call Forwarding Unconditional (CFU), Call Forwarding Busy (CFB), and Call Forwarding No Reply (CFNR). The standard utilizes methodologies based on ISO/IEC 9646 and references modified ISO/IEC 13873 requirements.
Key Topics
- Test Suite Structure (TSS): Outlines the organization of test groups and the association of various forwarding services at different network nodes (PINX).
- Test Purposes (TP): Details the objectives and requirements each test must address, ensuring the implementation's correct response to protocol events.
- Signalling Procedures: Defines the essential call states and message flows for call diversion, including activation, deactivation, interrogation, and invocation processes.
- Service Types: Focuses on CFU, CFB, and CFNR as core diversion supplementary services within PISN.
- Conformance Testing: Establishes frameworks for testing interoperability and correct protocol implementation using standardized test purposes.
Applications
SIST EN 301 453-1 V1.1.2:2005 is essential for network equipment manufacturers, testing laboratories, and enterprise network operators working with PISN installations:
- Equipment Development: Helps manufacturers of PISN (QSIG) compatible PBXs and gateways to validate protocol support for call diversion supplementary services, ensuring interoperability with third-party equipment.
- Product Certification: Used by test labs to structure certification programs for PBXs and network devices, increasing confidence in real-world multi-vendor environments.
- Network Integration: Guides integrators and network engineers in verifying that call diversion features (forwarding due to busy, no answer, or unconditional) function correctly in both user-side and network-side scenarios.
- Quality Assurance: Enhances consistency of protocol handling, reducing support issues related to misrouted or lost calls in complex telephony networks.
Related Standards
Organizations implementing SIST EN 301 453-1 V1.1.2:2005 will also benefit from familiarity with these closely related standards:
- ISO/IEC 13873 (1995): The foundational international standard for PISN inter-exchange signalling protocols for call diversion, referenced and modified in this standard.
- ETSI ETS 300 257: Specifies the overall protocol for diversion supplementary services.
- ISO/IEC 9646 Series: Provides the framework and methodology for conformance testing of Open Systems Interconnection (OSI) protocols.
- ETSI EN 301 060-1: Defines enhancements for Virtual Private Network (VPN) applications, relevant for environments utilizing PISN and call diversion.
- ETSI ETR 172: Discusses Virtual Private Networking (VPN) service and networking aspects.
- ETSI ETS 300 406: Details standard methods for testing and specification (MTS), supporting the creation and execution of protocol test suites.
Keywords: PISN, inter-exchange signalling protocol, call diversion, supplementary services, QSIG, TSS&TP, conformance testing, CFU, CFB, CFNR, telephony standards, interoperability, ISO/IEC 13873, ETSI EN 301 453-1, PBX testing.
