Week 2 Checkpoint- Signals

Week 2 Checkpoint- Signals - These can be found on...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Running head: SIGNALS 1 Signals Stephen D, James IT-242 John Tinney June 29, 2011 University of Phoenix (Axia College)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
SIGNALS 2 Signals When data is transmitted on a network, there is a need to use a form of signaling. Signaling is a form for using light energy, electrical, or radio waves to communicate. The process to change a signal to represent the data can be called encoding or modulation. There are two forms of signaling. They are analog and digital signaling. Video and Data signals are usually encoded utilizing a digital methodology where the voice is usually encoded using an analog format. In an analog technology, the sound is documented on an original form. For example: when recording any type of sound using a microphone, the audio is taken and stored in the storage media. The wave from the microphone is an analog wave. The mostly used type of conversion is a technique called Amplitude modulation or frequency modulation. Some of the most devices that are used in the analog to analog are TV tuners and Radio tuners.
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: These can be found on Telephones, AM and FM radio systems, and cable TV. A lot of these analog systems are becoming outdated due digital technology. An example for this would be the analog TV being converted to digital. In digital technology the data turns into numbers and then are stored on a digital device. One of the options available is the video and data can be directly encoded into the digital format and it usually does not need sampling. A Private Branch Exchange (PBX) is a telephone exchange that caters to a particular business or company. PBX allows the sharing of a single outgoing phone line by multiplexing a number of regular analog phones. In VoIP, the voice is sampled and transformed to a digital format and sent over the transmission medium. In todays world VOIP is becoming very popular on the internet. Several internet providers are offering VoIP to their customers. Skype is one of the largest companies that offer VOIP....
View Full Document

This note was uploaded on 01/25/2012 for the course UOP uop taught by Professor Jones during the Spring '11 term at University of Phoenix.

Page1 / 2

Week 2 Checkpoint- Signals - These can be found on...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online