branch office branch exchange
分支机构分支交换机
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Using software you install on your PC, you can take complete control over all the phones in the house and turn your internal phone network into a system like a private branch exchange (PBX) not unlike what you might find at the office.
FORBES: Ten O'Clock Tech: Data Plumbing For The Home
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