Signals

Week #2 Check Point: Signals

• Explain the differences between data, voice, and video signals in 200 to 300 words.

• Include a description comparing the differences between PBX and VoIP.

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 in order 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. 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 A lot of these analog systems are becoming outdated due digital technology. One of the examples 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 PBX better known as Private Branch Exchange 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 today’s world VOIP is becoming very popular over the internet. Several internet...