Sách English homework specialized electronics and telecommunications
Sách English homework specialized electronics and telecommunications
1. Read the following passage then answer the questions. ANALOGUE AND DIGITAL NETWORKS Digital technology in the telephone network is nothing new. Take all the relays in older exchanges as an example. Relays are either off or on, and there is no state in between these. Suitable combinations of relays could build up and remember numbers - perhaps a far-fetched example, but in was digital, so it will serve! What is new is the transfer of speech digitally. In other words, the sound we make when we