Jisho

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こうないこうかんき 構内交換機
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Noun
1. private branch exchange; PBX​Computing
Wikipedia definition
2. Business telephone system​A business telephone system is any of a range of a multiline telephone systems typically used in business environments, encompassing systems ranging from small key systems to large scale private branch. A business telephone system differs from simply using a telephone with multiple lines in that the lines used are accessible from multiple telephones, or "stations" in the system, and that such a system often provides additional features related to call handling.
Read “Business telephone system” on English Wikipedia
Read “構内交換機” on Japanese Wikipedia
Read “Business telephone system” on DBpedia

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