ITM 301 Chapter Notes - Chapter 5: Light Meter, Ferrule, Electrical Network

• School: Ryerson University
• Department: Information Technology Management
• Course: ITM 301
• Professor: Franklyn Prescod

Document Summary

Explain basic data transmission concepts, including signaling, data modulation, multiplexing, bandwidth, baseband, and broadband. Computers generate and interpret digital signals as electrical current where voltage is finitely measured as on or off and interpreted as binary data. In analog data signals, voltage varies infinitely and continuously, and can be characterized by amplitude, frequency, wavelength, and phase. A channel is a distinct communication path between nodes and may be separated either logically or physically. Multiple channels on a line enable full-duplex transmission, which is simultaneous, two-way communication. A baseband transmission is the only transmission on the media, whereas in broadband, multiple transmissions share a single media. Different types of multiplexing manipulate the signals in different ways. The various types include tdm (time division multiplexing), statistical multiplexing, fdm (frequency division multiplexing), wdm (wavelength division multiplexing), dwdm (dense wavelength division multiplexing), and cwdm (coarse wavelength division multiplexing)