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An intercom (intercommunication device), talkback or doorphone is a stand-alone voice communications system for use within a building or small collection of buildings, functioning independently of the public telephone network (Azori 2016). Intercoms are generally mounted permanently in buildings and vehicles. Intercoms can incorporate connections to public address loudspeaker systems, wal
Table of Content
1 Industry Overview
1.1 Video Intercom Devices Industry
Figure Video Intercom Devices Industry Chain Structure
1.1.1 Overview
1.1.2 Development of Video Intercom Devices
1.2 Market Segment
1.2.1 Upstream
Table Upstream Segment of Video Intercom Devices
1.2.2 Downstream
Table Application Segmen