Archive for the ‘Uncategorized’ category

The Basics Of Mobile Data Communications

March 5th, 2021

Most people today are familiar with data plans on cell phone systems. It allows them to access their email and the internet from their cell phones. However, most people are not familiar with mobile data communications. This is something that, while similar to the aforementioned cellular plans, is actually used to transmit user to user information.

Commonly used by emergency personnel, mobile data communications allow police, fire, and EMTs to transmit and receive critical information in the form of data. Some might wonder why this method is preferred to traditional radio communications, and the question is well asked and answered.

In the military, radio personnel are trained in communications techniques to keep confusion to a minimum. Because certain letters have a similar sounds when spoken and can be easily confused with another, a system was needed to help reduce this problem to a minimum. Letters like T and P have a similar sound, so instead of simply saying T or P, they would say a word that began with the appropriate letter. T was now Tango and P was now Papa.

This ability to keep confusion to a minimum was further reinforced by standardized training and consistent use of these words representing letters. However, while this greatly reduced misunderstanding, it did not eliminate communication errors. Today, it is necessary to be able to communicate much more specific and lengthy information in certain emergency situations; therefore, a new system was needed.

The easiest solution would be to transmit the raw data from one point to another. This would allow the end user or recipient the ability to receive accurate information without the possibility of transmission error. The other benefit of this type of mobile data communication is that it helped keep information more secure than it would be if transmitted over open airwaves where anyone could be listening.

The secure aspects of this kind of site to site com appealed to the military, the police, and other public servants engaged in emergency response. In the case of medical information and the requisite security concerns, raw data transmission seems the best option available.

Until recent years, this type of transmission required high specialized equipment and was very cost prohibitive. The other draw back was the speed of the transmission. In the early days, it might take just as long to transfer the data to the end user who needed it, as it would be to relay it via voice transmission. Today, with the technological advancements that have been made, mobile data transmission has never been more secure and quick.

There are specific companies that specialize in mobile data transmission. While one would think that cellular companies would be leading the pack, the security requirements and technology while similar are very different. This means that specialized equipment is still a necessity although not quite as cost prohibitive as years past.

The sheer numbers of emergency responders has increased as the population has increased. This means that proprietary systems are necessary to keep information from becoming confused with multiple transmissions.

Different Types Of Data Communication Media

March 5th, 2021

The process in which data is transferred from one computer to another is known as communication media. Data communication involves transmission of digital of information to different electronic devices through wireless or cabled connections. The two commonly used computer communication media used are bounded and unbounded media.

A. Bound Media

Data transfer through physical connections is referred to as bounded media in that signals are sent to other external devices from one computer in a network. Computers can be interconnected to share files and devices in a network by means of cabling which facilitates faster communication of information. Bounded media is a faster data communication that provides high speed transfer of signals over long distances and is the most reliable media for message sending.

Bounded media is categorized into three types of data communication which enables connection of different types of network. These cables include:

1. Coaxial cable

This is most common bounded media that is many electronics to transfer data and it is designed with two parallel copper conductors. It has a solid central copper conductor that transmits signal and is coated with a protective cover to reduce electromagnetic interference. Coaxial cable is found in different gauges at affordable prices and is easier to work with. They are easy to install and can support up to 10Mps capacity with medium attenuation. Despite its popularity, the only serious drawback it has is that the entire network is always affected with a single cable failure.

2. Twisted pair cable

Twisted pair cables are found in two types and these include unshielded and shielded twisted pair cables. It is commonly used because it is lighter and inexpensive. They are made up of twisted solid copper wires which help to reduce vulnerability to EMI and cross talk effects. This type of cables is cheaper and can support up to 100mps speed capacity.

3. Fiber optic

Unlike other types of cables, fiber optic uses electrical signals for communication and is made up of reflective cladding that prevents loss of light in the glass core. Although it very expensive and hard to install, optic cables can support at least 2gbps and are not vulnerable to EMI interference. It has got also very fast data transmission and very low attenuation compared to other data cables.

B. Unbounded media

This type of data communication media involves networking of multiple computers through a wireless connection. Creating a wireless connection is much easier since no physical connection is required and can connect multiple computers in a room. Unbounded media uses space or air as the transmission medium for electronic waves. Some of the unbounded media are the satellites, radio, Bluetooth and Wi-Fi among others. Installation of wireless network is much easier and faster compared to the bounded media which require an expert to do the configuration. Through wireless settings, you can also transfer huge files of data to any networked computer since the unbounded media supports very high bandwidths just like the cabled network.