ISO/IEC 14842:1996 情報技術—システム間の電気通信および情報交換—プライベート統合サービスネットワーク—仕様、機能モデル、および情報フロー—補足サービスのオーバーライドを妨害しないでください。 | ページ 2

4.1 外部定義

この国際規格では、他の文書で定義されている次の用語を使用しています。

この国際規格は、ISO/IEC 11574 で定義されている次の基本機能呼び出しエンティティ (FE) を参照しています。

• コール制御 (CC)
• コール コントロール エージェント（CCA）

この国際規格は、ISO/IEC 11574 で定義されている次の基本的なコール間の FE 関係を参照しています。

• rl
• r2
• r3

この国際規格は、ISO/IEC 11574 で定義されている次の基本的な呼情報フローを参照しています。

• CHAN ACK 要求/指示
• 切断要求/指示
• リリース要求/指示
• リリース対応・確認
• 報告依頼・指摘
• 設定要求・指示
• 応答/確認をセットアップします。

この国際規格は、ISO/IEC 11574 で定義されている次の基本的な呼情報フロー サービス要素を参照しています。

• 宛先番号
• 接続タイプ。

この国際規格は、ISO/IEC 14136 で定義されている次の情報フロー要素を参照しています。

• 発信番号
• 発信サブアドレス。

Foreword

ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International Standards through technical committees established by the respective organization to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work.

In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75% of the national bodies casting a vote.

International Standard ISO/IEC 14842 was prepared by ECMA (as Standard ECMA-193) and was adopted, under a special “fast-track procedure”, by Joint Technical Committee ISO/IEC JTC 1, Information technology. in parallel with its approval by national bodies of ISO and IEC.

Introduction

This International Standard is one of a series of International Standards defining services and signalling protocols applicable to Private Integrated Services Networks (PISNs). The series uses ISDN concepts as developed by ITU-T and conforms to the framework of International Standards for Open Systems Interconnection as defined by ISO/IEC.

This particular International Standard specifies the Do Not Disturb and Do Not Disturb Override supplementary services.

1 Scope

This International Standard specifies the Supplementary Services Do Not Disturb (SS-DND) and Do Not Disturb Override (SS-DNDO), which are applicable to various basic services supported by Private Integrated Services Networks (PISN). Basic services are specified in ISO/IEC 11574.

SS-DND is a supplementary service which enables a served user to cause the PISN to reject any calls, or just those associated with a specified basic service, addressed to the served user's PISN number. The calling user is given an appropriate indication. Incoming calls are rejected as long as the service is active. The served user's outgoing service is unaffected.

SS-DNDO is a supplementary service which enables a served user to override SS-DND at a called user; that is, to allow the call to proceed as if the called user had not activated SS-DND.

SS-DND and SS-DNDO are described separately because SS-DND is a service used by a called user, and SS-DNDO is a service used by a calling user. This leads to describing two very related state machines.

Supplementary service specifications are produced in three stages, according to the method described in CCITT Recommendation I.130. This International Standard contains the stage 1 and stage 2 specifications of SS-DND and SS-DNDO. The stage 1 specifications (clauses 6 and 7) specify the supplementary service as seen by users of PISNs. The stage 2 specification (clauses 8 and 9) identify the functional entities involved in the supplementary service and the information flows between them.

3 Normative references

The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards.

4 Definitions

For the purposes of this International Standard, the following definitions apply.

4.2 Other definitions