PBX的用法和樣例：
例句
用作名詞 (n.)
- This facility is important in some PBX systems which use nonstandard lines that certain modems will interpret as a dead line.
這種設備在某些專用小交換機系統中非常重要，這些系統用的是非標準線路，某些數據機會把它們當作死線路。
辭彙搭配
- common battery pbx 共電式用戶小交換機...
