noun
indoor apparatus; customer premises equipment
Technical term used in telecommunications and utilities for equipment installed inside a building, such as telephone sets, modems, or indoor units.
光回線の宅内装置が故障したので交換してもらった。
The indoor unit for the fiber-optic line broke down, so I had it replaced.
宅内装置には電話機やルーターなどが含まれる。
Indoor apparatus includes telephones, routers, and the like.
Refers to outdoor equipment, such as cables or distribution boxes outside the building, contrasting with 宅内装置 which is inside.
Compound of 宅内 (inside the house) and 装置 (apparatus, equipment). A straightforward technical term.