In electric power system, Digital Program Controlled Exchange has been used broadly because communications requests high reliability.
在电力系统中，由于对通信的可靠性要求较高，因此程控数字交换机正在得到广泛的应用。
Postal and telecommunications to achieve the program-controlled exchange, digital transmission will take the lead in the province completed the first telephone counties.
邮电通讯实现了交换程控化，传输数字化，并率先在全省建成了第一个电话县。
The telecommunications are more advanced with the program-controlled exchange and digital transmission.
通讯上实现了交换程控化、传输数字化。
The telecommunications are more advanced with the program-controlled exchange and digital transmission.
通讯上实现了交换程控化、传输数字化。
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