PBX
Meaning of PBX in English
n.
Pronunciation: ˌ p ē -( ˌ )b ē - ' eks
Function: noun
Etymology: p rivate b ranch e x change
Date: 1940
: a private telephone switchboard
Merriam Webster Collegiate English Dictionary.
Merriam Webster - Энциклопедический словарь английского языка.
2012