private branch exchange
(telecommunications) A telecommunications switching system, physically located at a customer's place of business, that provides internal communication between users and also access to outside (trunk) telephone lines.
simple past tense and past participle of underseek
In a technological manner. / Using technology.
Alternative form of Bulgar
その会社の事業所内に設置された電話交換システム（構内交換機）は先週、VoIPと全部署での発信転送をサポートするようにアップグレードされました。
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DiQt
Free
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