This Architectural Drawing is AutoCAD 2d drawing of ANTENNA STANDARD INDOSAT FOR GSM, DCS, 3G HEIGHT DETAILS IN AUTOCAD,DWG FILE. The Global System for Mobile Communications (GSM) is a standard developed by the European Telecommunications Standards Institute (ETSI) to describe the protocols for second-generation (2G) digital cellular networks used by mobile devices such as mobile phones and tablets. For more details and information download the drawing file.