ISO/IEC 11574:2000 PDF

Overview

ISO/IEC 11574:2000 defines the service description, functional capabilities and information flows for circuit‑mode 64 kbit/s bearer services in a Private Integrated Services Network (PISN). It specifies three standard bearer service categories (unrestricted 8 kHz structured, 8 kHz structured for speech, and 8 kHz structured for 3.1 kHz audio) and the required control aspects so a PISN can provide interoperable 64 kbit/s circuit connections. The standard addresses end‑to‑end physical‑layer connections, call control signaling, functional entity models and message sequences, while excluding negotiation of service at call establishment, mid‑call service changes and unidirectional services.

Key topics and technical requirements

• Service scope: Circuit‑mode 64 kbit/s bearer services for PISNs - unrestricted and structured variants for speech and 3.1 kHz audio.
• Service model: Stage‑1 (service description) and stage‑2 (functional capabilities and information flows) definitions consistent with ISDN concepts.
• Functional entities: Call Control Agent (CCA), Call Control (CC) and allocation of functional entities to physical nodes.
• Information flows and procedures: Defined messages such as SETUP, CHANNEL_CONNECT, DISCONNECT, RELEASE, REPORT and related sequences for normal, unsuccessful and interworking calls.
• Interworking: Considerations and procedures for interworking with public ISDNs, analogue and other digital networks, including encoding law conversion where applicable.
• Supplementary functions (optional): Procedures equivalent to public ISDN supplementary services like Subaddress and Multiple Subscriber Number.
• Operational material: SDL diagrams, static service attributes, charging/capability notes and normative annexes.
• Exclusions: No provisions for on‑the‑fly service negotiation at call setup, changing service during a call, or unidirectional services.

Applications and who uses it

ISO/IEC 11574:2000 is used by:

• Telecommunications architects and network designers implementing PISN/PINX exchanges and ISDN‑like private networks.
• Vendors and integrators developing switching platforms, call control software, and gateways requiring 64 kbit/s circuit‑mode compatibility.
• Interworking engineers designing gateways between private networks and public ISDNs, PSTN or other digital networks.
• Standards and compliance teams validating signaling, billing/charging capabilities and service attribute conformity. Practical uses include deploying guaranteed bit‑rate voice or data channels, implementing call signaling for private networks, and ensuring end‑to‑end interoperability with public ISDN services.

Related standards

• ISO/IEC 11571 (Addressing)
• ISO/IEC 11579‑1 (PISN reference configuration / PINX)
• ITU‑T Rec. I.231 (Circuit‑mode bearer service categories)
• ITU‑T Rec. G.711 (PCM encoding)
• ITU‑T Recs. I.251.* and I.520 (number identification and interworking) These adjacent standards are referenced for addressing, encoding and interworking details relevant to ISO/IEC 11574:2000.

Keywords: ISO/IEC 11574:2000, PISN, 64 kbit/s circuit‑mode bearer services, ISDN, service description, information flows, call control, Subaddress, Multiple Subscriber Number.