A subsystem consisting of a microcomputer, a synchronizer, and a random access memory. It contains sufficient memory to accommodate the call-processing program and its data base.; 由微計算機(jī)、同步裝置和隨機(jī)讀寫存儲器組成的子系統(tǒng)。它具有足夠的存儲容量用以 存放呼叫處理程序及其數(shù)據(jù)庫。