noun
base unit; main telephone
Refers to the primary handset or base station in a system with extensions (子機). Common in home and office phone setups.
See also: 子機
親機が充電されていないと、子機も使えません。
If the base unit isn't charged, the cordless handsets won't work either.
新しい電話を買ったら、まず親機を電話回線につないでください。
When you buy a new phone, first connect the base unit to the telephone line.