digital telephone exchange

基本解釋

Thus a base station of PHS is compatible with ISDN and is often connected directly to ISDN telephone exchange equipment e. g. a digital switch.
因此，小靈通基站也可與綜合業(yè)務(wù)網(wǎng)系統(tǒng)相匹配并且經(jīng)常作為綜合業(yè)務(wù)網(wǎng)電話的交換設(shè)備。譬如，電子交換機(jī)。
Postal and telecommunications to achieve the program-controlled exchange, digital transmission will take the lead in the province completed the first telephone counties.
郵電通訊實(shí)現(xiàn)了交換程控化，傳輸數(shù)字化，并率先在全省建成了第一個(gè)電話縣。