PBX
Meaning of PBX in English
transcription, транскрипция: [ ˌpē-(ˌ)bē-ˈeks ]
noun
Etymology: p rivate b ranch e x change
Date: 1940
: a private telephone switchboard
Merriam-Webster's Collegiate English vocabulary.
Энциклопедический словарь английского языка Merriam Webster.
2003