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ETSI TS 101 377-3-14
- GEO-Mobile Radio Interface Specifications; Part 3: Network specifications; Sub-part 14: Call Waiting (CW) and Call Hold (HOLD) Supplementary Services - Stage 2; GMR-2 03.083
- standard by European Telecommunications Standards Institute, 03/01/2001
- Publisher: ETSI
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GMR-2 specification defining the requirements for Call Waiting (CW) and Call Hold (HOLD) supplementary services.