European Digital Cellular Telecommunications System (Phase 2); Call Waiting (CW) and Call Holding (HOLD) Supplementary Services - Stage 1 (GSM 02.83 Version 4.6.7) Second Edition
This European Telecommunication Standard (ETS) describes the supplementary services belonging to the group CALL COMPLETION SUPPLEMENTARY SERVICES. The general aspects@ including definitions and recommended provision@ of the description of the GSM supplementary services are given in specification GSM 02.04. The group of CALL COMPLETION SUPPLEMENTARY SERVICES is divided into the following two supplementary services: - Call waiting (section 1); - Call hold (section 2).