Rick Graziani Rick Graziani [email protected][email protected][email protected][email protected]Chapter 8 – LAN Technologies and Network Topology Computer Networks and Internets by Douglas Comer CST 311 Introduction to Telecommunications Instructor: Rick Graziani August 1, 2002 Includes material from Cisco Networking Academy CCNA Semester 1 University transferable option of CIS 181 at Cabrillo College
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A digital encoding technique in which each bit period is divided into two complementary halves to provide timing information.
A negative-to-positive voltage (0-to-1) transition in the middle of the bit period designates a binary “1” while a positive-to-negative transition represents a “0.” (Newton)
The data is included in the direction of the transition.
Rick’s Coding method (no standard – can go other direction)
draw lines in the middle of the bit cell make a up arrow for a one bit make an down arrow for a zero bit connect the lines and make transition when necessary