ISO/IEC 10732:1993 PDF

Name: ISO/IEC 10732:1993 — Information technology — Use of X.25 Packet Layer Protocol to provide the OSI connection-mode Network Service over the telephone network
SKU: ISO/IEC 10732:1993
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Information technology — Use of X.25 Packet Layer Protocol to provide the OSI connection-mode Network Service over the telephone network

Название (английский):

ISO/IEC 10732:1993

Information technology — Use of X.25 Packet Layer Protocol to provide the OSI connection-mode Network Service over the telephone network

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 8
Дата публикации:: 28 апреля 1993 г.
Издание:: ISO/IEC IS 10732 edition 1 version 1
ICS:: 35.100.30

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Описание (английский):

Applies to environments including telephone network leased circuit connection between two DTEs; telephone network switched connection between two DTEs; DTE access to a PSDN via a telephone network leased circuit connection; DTE access to a PSDN via a telephone network switched connection. Provision is achieved by specifying the mapping of the CONS primitives and parameters to and from the elements of the protocols used.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO/IEC 10732:1993 specifies how the X.25 Packet Layer Protocol (PLP, ISO/IEC 8208) is used to provide the OSI Connection-mode Network Service (CONS) over the telephone network. It covers both leased-circuit and switched-circuit telephone links and defines the mapping of CONS primitives and parameters onto X.25 elements and procedures required when a switched telephone connection is present.

Two primary configurations are addressed:

DTE-to-DTE over a telephone network (leased or switched)

DTE-to-PSDN (DTE-to-DCE) via a telephone network (leased or switched)

The standard complements CCITT Rec. X.223 / ISO 8878 by adding provisions specific to switched telephone network operation.

Key Topics and Requirements

Mapping CONS to X.25 PLP: Specifies how CONS primitives/parameters are translated to and from X.25 packet-layer elements (as referenced in X.223 / ISO 8878).

Control of underlying connections:

No extra procedures for leased circuits.
For switched connections, a successful N-CONNECT request triggers phone-call setup (V-series modems, V.25 or V.25 bis signaling). Failure is reported as an N-DISCONNECT indication.
Procedures for unexpected disconnection and recovery are defined; mapping to OSI N-DISCONNECT indications applies.

Data link layer constraints:

ISO 7776 (LAPB-compatible) single-link basic mode (modulo 8) is mandatory; extended mode (modulo 128) may be implemented.
Addressing: Calling end = A, called end = B on switched links unless pre-agreed.
Recommendations: T1 timer adjustable to 5 s for long-delay links (e.g., satellite); support for 1031-octet frames and possibly large windows.

Packet layer considerations:

Telephone-network addressing is used to establish switched connections.
For DTE-to-DTE over telephone links the X.25 Address Field is empty; Called/Calling NSAPs are carried in address extensions. Any Address Field contents received should be ignored.

Identification exchange: When needed (billing/security), identification methods follow X.32 procedures; governed a priori for DTE-to-DTE or by PSDN for DTE-to-DCE.

Applications and Who Uses It

Network and telecom engineers implementing X.25 over PSTN/PSDN.

Equipment vendors building modems, DTEs, DCEs, and packet-switching interfaces that must interoperate with OSI CONS.

System integrators deploying legacy X.25-based applications across telephone networks.

Standards and compliance teams verifying conformance with international X.25/OSI mappings.

Keywords: ISO/IEC 10732:1993, X.25, OSI CONS, telephone network, switched connection, leased circuit, DTE, DCE, PSDN, ISO/IEC 8208, ISO 7776, V.25

Related Standards

CCITT Rec. X.223 / ISO 8878 (mapping CONS to X.25 PLP)

ISO/IEC 8208 (X.25 Packet Layer Protocol)

ISO 7776 (LAPB-compatible data link procedures)

CCITT Rec. X.32 (DTE access procedures and identification)

CCITT Rec. X.213 / ISO/IEC 8348 (OSI Network Service definition)

V.25 / V.25 bis (telephone signaling for switched calls)

ISO/IEC 10732:1993 PDF

Abstract

Похожие стандарты

Overview

Key Topics and Requirements

Applications and Who Uses It

Related Standards

Технические детали

ISO/IEC 8208:1995

Information technology — Data communications — X.25 Packet Layer Protocol for Data Terminal Equipment

ISO/IEC 10030:1990/Amd 3:1993

Information technology — Telecommunications and information exchange between systems — End System Routeing In…

ISO 7776:1986/Amd 1:1992

Information processing systems — Data communications — High-level data link control procedures — Description…

ISO/IEC 8348:1996/Amd 2:2002

Information technology — Open Systems Interconnection — Network Service Definition — Amendment 2: Addition of…