It/242 Checkpoint: Signals

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  • Published : March 22, 2012
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Checkpoint: Signals
Adam Kurylo
IT/242
3/8/2012

Voice Signal Technology- Commonly referred to voice over IP, or VoIP, involves the delivery of voice services over the internet. Voice travels in packets over IP networks with fixed maximum compacity. The technology uses protocols that deal with the data link and the physical layer, and use quality of service mechanisms to ensure the technology works well even in congested scenarios. Some of those technologies are; IEEE 802.11e- which defines a modification through the MAC layer, IEEE 802.1p- which defines 8 different classes of service for traffic on layer 2-wire internet (including one dedicated to voice), and ITU-T G- which provides a way to create a high speed LAN using existing home wiring . AS we learned about VoIP above, the differences of PBX are as follows:

PBX is costs less, so has been popular in business
Not set up to handle voice calls
Smaller telephone network
Could be set up to integrate VoIP

Video Signal Technology- Video signals can be both analog and digital signals. Analog video consists of a low voltage signal containing intensity information, timing information, and a horizontal sync signal. Digital video signals contain a series of digital images displayed in rapid succession in “frames”, measured by FPS (frames per second). Data Signal Technology- Data technology can be digital or analog. Analog signals can have an infinite number of values and range, while digital signals only have a limited number of values. Data transmission is usually some form of communication, such as a message like an email or PowerPoint presentation, but is not limited to a call or video signal.

References
Wikipedia.com. (n.d.). Retrieved from http://en.wikipedia.org/wiki/Digital_video Wikipedia.com. (n.d.). Retrieved from http://en.wikipedia.org/wiki/Data-Signal
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