ETS 300 925 : 20003

Foreword
1 Scope
2 Normative references
3 Definitions and abbreviations
   3.1 Definitions
   3.2 Abbreviations
4 Description
5 Normal operation with successful outcome
   5.1 Provision
   5.2 Withdrawal
   5.3 Network related service configuration
   5.4 Normal operation for voice group call
       establishment
   5.5 Charging requirements
6 Exceptional procedures or unsuccessful outcome
7 Interaction with other GSM services
   7.1 Calling Line Identification Presentation (CLIP)
   7.2 Calling Line Identification Restriction (CLIR)
   7.3 Connected Line Identification Presentation (COLP)
   7.4 Connected Line Identification Restriction (COLR)
   7.5 Call Forwarding Unconditional (CFU)
   7.6 Call Forwarding on mobile subscriber Busy (CFB)
   7.7 Call Forwarding on No Reply (CFNRy)
   7.8 Call Forwarding on mobile subscriber Not
       Reachable (CFNRc)
   7.9 Call Waiting (CW)
8 Interworking considerations
Annex A (informative): Status of Technical Specification
        GSM 02.68
History

Defines the stage 1 description of the Voice Group Call Service (VGCS) which will allow speech conversation of a predefined group of service subscribers in half duplex mode on the radio link taking into account multiple mobile service subscribers involved in the VGCS call per cell. This document does not cover with the Man-Machine Interface (MMI) requirements, but makes reference to the appropriate Global System for Mobile Communications (GSM) specifications. Covers a teleservice of a digital cellular telecommunications system GSM. THIS ISSUE SUBJECT: Clarification on handling if talking subscriber leaves the VGCS area.