Digital cellular telecommunications system (Phase 2) (GSM);Call Waiting (CW) and Call Hold (HOLD) supplementary services;Stage 3 (GSM 04.83) (Endorsed by Asociación Española de Normalización in October of 2022.)
| AENOR | |
|---|---|
| Product Category | Standards and Technical Documents |
| Product Name | UNE-ETS 300567 Ed2 |
