- direct keying over trunk or toll circuits
- автоматическое установление соединения (набор номера) абонентом на междугородной сети с помощью тастатурного номеронабирателя
Англо-русский словарь промышленной и научной лексики. 2014.
direct keying over trunk or toll circuits
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Business telephone system — Early model 464G Western Electric key telephone set A business telephone system is any of a range of a multiline telephone systems typically used in business environments, encompassing systems ranging from small key systems to large scale private … Wikipedia
Private branch exchange — A private branch exchange (PBX) is a telephone exchange that serves a particular business or office, as opposed to one that a common carrier or telephone company operates for many businesses or for the general public. PBXs are also referred to as … Wikipedia
