3 Definitions and abbreviations

22.5193GPPBusiness communication requirementsTS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

3.1 Definitions

For the purposes of the present document, the terms and definitions given in TR 21.905 [10] and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905 [10].

business communication: any communication that is either:

originated in an NGCN; or
terminated in an NGCN; or
originated in the NGN on behalf of an enterprise; or
terminated in the NGN on behalf of an enterprise;

and which is subject to special arrangements between the NGN operator and the enterprise

business communication capabilities: any capability whether hosted in an NGCN or an NGN that enables and/or enriches Business Communication

NOTE: Business Trunking, Hosted Enterprise Services and Virtual Leased Line are examples of business communication capabilities hosted in NGN.

Business Trunking (BT): connection of an NGCN to an NGN

business trunking application: NGN application that either provides transit capabilities between NGCNs, or, break-in capabilities from NGN to NGCN and/or break-out capabilities from NGCN to NGN

NOTE: A business trunking application may also provide additional services beyond basic breakin, breakout and transit capabilities to the NGCN.

corporate network user identifier: identifies a corporate network user on communications entering, leaving or transiting the NGN, either representing an originating corporate network user or as a globally routable target identity

Corporate telecommunication Network (CN): sets of enterprise premises equipment, owned by or managed on behalf of an enterprise that are located at geographically dispersed locations and are interconnected to provide telecommunication services to a defined group of users belonging to that enterprise

enterprise: unit of economic organization or activity, especially a business organization

Hosted Enterprise Services (HES): NGN application whereby the NGN hosts all originating and/or terminating business communication capabilities for enterprise users that are directly attached to NGN and have an IMS service subscription for this application in the NGN

Next Generation CN (NGCN): self-contained corporate network designed to take advantage of emerging IP-based communications solutions and that can have its own applications and service provisioning

NOTE 1: For the purpose of the present document it is a corporate network that provides an IP-based interface to an NGN.

NOTE 2: TR 102 478 [7] uses NGCN to collectively refer to IP-PBXs.

NGCN site: separate part of an NGCN

NOTE: An NGCN site might represent a part of an NGCN bound to a specific geographic location. When an NGCN site serves more than one geographic location then all locations served by that NGCN site would have access to an NGN concerned via the NGCN site’s connectivity arrangement with that NGN. Communication between different NGCN sites belonging to the same NGCN can but need not pass through their respective NGN(s). For example, such communications might be routed by the NGN(s) only during periods of high traffic or equipment outage within the NGCN. An NGCN site can have access to its NGN either directly or via some other NGN that provides a transit capability. An NGCN can have NGCN Sites in different countries.

NGCN identifier: identifier by which an NGCN is known to an NGN with which it has a connectivity arrangement

public network traffic: traffic sent to or received from an NGN for processing according to the normal NGN rules

private network traffic: traffic sent to or received from an NGN for processing according to an agreed set of rules specific to an enterprise or a community of closely related enterprises

Private Numbering Plan (PNP): numbering plan explicitly relating to a particular private numbering domain, defined by the PISN Administrator of that domain

NOTE 1: See ISO/IEC 11571 [5].

NOTE 2: Terminology used in this definition and in relation to this term used in the text is as defined in
ISO/IEC 11571 [5]. For the purposes of the present document a PISN and a NGCN can be regarded as equivalent.

PNP number: number belonging to a PNP

NOTE: See ISO/IEC 11571 [5].

3.2 Abbreviations

For the purposes of the present document, the following abbreviations apply:

BT Business Trunking

CAC Communication Admission Control

CN Corporate telecommunication Network

HES Hosted Enterprise Services

IMS IP Multimedia core network Subsystem

IP Internet Protocol

NGCN Next Generation Corporate Network

NGN Next Generation Network

PBX Private Branch Exchange

PNP Private Numbering Plan

PSAP Public Safety Answering Point

SLA Service-Level Agreement

TIP Termination Identity Interface

UE User Equipment

UNI User to Network Interface