1.Previous
3.Next

over traditional telephone systems and leased lines. These generally provided Asynchronous communications at 110 or 300 bits per second (bit/s), and the connection between devices was normally manual, using an attached analogue telephone handset. By the 1970s, higher speeds of 1,200 and 2,400 bit/s for asynchronous dial connections, 4,800 bit/s for synchronous leased

1.Previous
3.Next