Giáo trình tiếng anh điện tử viễn thông - digital telephone exchanges p3
Giáo trình tiếng anh điện tử viễn thông - digital telephone exchanges p3
Classification a. Means of transmission b. Service c. Circuit switched network d. Method of signalling e. Electronic system f. Light sources g. Remote part of an exchange Characteristics /Function A. It provides a means of asynchronous data transmission. B. It uses one pair for performing all signalling functions of one route. C. It involves the sampling and coding of analogue signals. D. They enable PCM transmission to be used further out in the local network.