ICSA 411: Week 2Data Communication

Telecommunications Standards

Advantages

Disadvantages

Institute of Electrical and Electronics Engineers (IEEE)

American National Standards Institute (ANSI)

National Institute of Standards and Technology (NIST)

Industry Associations

Int’l Telecommunications Union (ITU)

ISO (International Standards Organization)

Internet Engineering Task Force (IETF)

RFC?Internet Standard

Data Communication Basics

Analog Data Choices

Digital Data Choices

Transmission Choices

Data, Signals, and Transmission

Advantages of Digital Transmission

Analog Encoding of Digital Data

Modem

Methods of Modulation

Amplitude Shift Keying (ASK)

ASK Illustration

Frequency Shift Keying (FSK)

FSK Illustration

Phase Shift Keying (PSK)

PSK Illustration

Differential Phase Shift Keying (DPSK)

Complex Modulations

Quadrature Amplitude Modulation (QAM)

Quadrature Amplitude Modulation Illustration

Quadrature Amplitude Modulation Uses

Trellis Coded Modulation (TCM)

CCITT V-Series Modem Recommendations

V.32 bis Modems

V.34 Modems

V.34+ Modems

56kbps Modems

Digital Encoding of Analog Data

Converting Samples to Bits

Codec

Digital Encodingof Digital Data

Differential NRZ

Problems With NRZ

Biphase Alternatives to NRZ

Manchester Code

Differential Manchester

Digital Encoding Schemes

Asynchronous & Synchronous Transmission

Asynchronous Transmission

Synchronous Transmission