ISO IEC ISP 10613-16-1995 PDF

Full title and description

Information technology — International Standardized Profile RA — Relaying the Connectionless-mode Network Service — Part 16: Definition of profile RA53.1121, relaying the Connectionless-mode Network Service between Token Ring LAN subnetworks and PSDNs using virtual calls over a digital data circuit / CSDN leased line permanent access. The document specifies the RA53.1121 profile for interworking units that perform relay functions for the connectionless-mode network service between Token Ring subnetworks and public switched data networks (PSDNs) using virtual-call permanent digital circuits.

Abstract

This standard defines profile RA53.1121 to enable interworking units to relay the OSI connectionless-mode network service between Token Ring LAN subnetworks and PSDNs when virtual calls are carried over a permanent digital data circuit (CSDN leased line). It identifies the required combination of OSI base protocols, relay behaviour, addressing and mapping considerations, and service assumptions needed to implement the relay function for the specified interworking scenario.

General information

• Status: Withdrawn
• Publication date: 21 December 1995 (published December 1995)
• Publisher: ISO/IEC (ISO/IEC JTC 1 — Information technology)
• ICS / categories: 35.100.05 — Multilayer applications
• Edition / version: Edition 1 (1995)
• Number of pages: 7 pages

Scope

The standard applies to interworking units (network relays) that provide relaying of the OSI connectionless-mode network service between Token Ring LAN subnetworks and public switched data networks (PSDNs) where virtual calls are used over a permanent digital data circuit (CSDN leased-line permanent access). It constrains the set of OSI protocol options and specifies profile elements (RA53.1121) required for correct interoperability in this specific physical and service environment.

Key topics and requirements

• Definition of profile RA53.1121 for relaying connectionless-mode network service between Token Ring LANs and PSDNs.
• Functional behaviour expected of interworking/relay units (network relay functions) in the specified scenario.
• Mapping and encapsulation rules for PDUs when crossing between Token Ring subnetworks and PSDN virtual-call circuits.
• Addressing, routing and service assumptions necessary for correct delivery of the connectionless-mode service.
• Requirements and constraints related to using virtual calls over a digital data circuit / CSDN leased-line permanent access.
• Reference to the OSI base standards and combination of protocol options that together implement the relay profile.

Typical use and users

Typical users include network equipment manufacturers, system integrators, telecom operators and service providers implementing interworking units or relay devices between Token Ring local area networks and public switched data networks. Standards bodies, test labs and maintainers of legacy OSI-based network interworking solutions may also consult the profile when validating or documenting interoperability behavior for historical systems.

Related standards

This document is Part 16 of the ISO/IEC ISP 10613 series (International Standardized Profile RA — Relaying the Connectionless-mode Network Service). Related parts in the series define other RA profiles for relaying the connectionless-mode service across different LAN and PSDN subnetwork combinations (for example other parts such as Part 6 and other numbered parts in the 10613 series). It is produced under ISO/IEC JTC 1 and complements other OSI and PSDN related standards used for protocol definitions and data-circuit interfaces.

Keywords

RA53.1121, connectionless-mode, network relay, Token Ring, PSDN, virtual calls, CSDN, leased line, interworking, OSI profile, ISO/IEC 10613

FAQ

Q: What is this standard?

A: It is ISO/IEC ISP 10613-16:1995, Part 16 of the ISO/IEC 10613 RA series, which defines profile RA53.1121 for relaying the OSI connectionless-mode network service between Token Ring LAN subnetworks and PSDNs using virtual-call permanent digital circuits.

Q: What does it cover?

A: It specifies the required profile elements, relay behaviour, mapping/encapsulation and service assumptions needed for interworking units to relay the connectionless-mode network service in the specific Token Ring ↔ PSDN scenario over a permanent digital data circuit (CSDN leased line).

Q: Who typically uses it?

A: Network equipment vendors, telecom operators, system integrators, test laboratories and standards practitioners dealing with OSI-based interworking or maintaining legacy Token Ring/PSDN interworking deployments.

Q: Is it current or superseded?

A: The standard is withdrawn (originally published December 1995 and later withdrawn). It is a historical/profile document and should be treated as withdrawn for contemporary deployments; users should consult current ISO/IEC publications or national adoption documents for any active replacements or updated profiles.

Q: Is it part of a series?

A: Yes — it is Part 16 of the ISO/IEC ISP 10613 series (the RA series addressing relaying the connectionless-mode network service across various subnetwork combinations).

Q: What are the key keywords?

A: Token Ring, PSDN, connectionless-mode, network relay, RA53.1121, virtual calls, CSDN, leased line, interworking, OSI profile.