DATA COMMUNICATIONS

Data communication is a part of the telecommunications specifically with respect to the transmission or transfer of data and information between computer computer and other devices in a digital form that is sent through the data communications media . Data means the information presented by the digital cues . Data communication is vital baguan of an information society , because these systems provide the infrastructure that allows computers to communicate with each other .

Benefits Data Communications

1. Data sharing

With this facility, each computer can use the data to another computer so that will save time and facilitate the job, especially if the distance between computers apart.

2. sharing program

Certain applications can be run on other computers in the network. Usually the files stored in server principal application of the network to then be installed via jaringancomputer. This makes the installation a piece of software in the network more easily. It also makes the process of upgrading and maintenance of applications across the network will be felt easily.

3. Device Sharing

Users can divide dikomputernya devices in the network. For example, devices such as printers, CD-ROM, and hard disk. When paired in a computer network can menshare devices on their computer that allows other computer users to access these devices are dikomputer as their own. With this, the use of a device will be more efficient for example, a single printer can be used by many computer users are connected to the network.

4. The relationship between the different devices that

allows the user to communicate with a variety of media, such as email and video conferencing. This allows for text, voice, images and video can be transmitted along a computer network as data. The communication can be done in networked local or internet 

5. Paperless

The existence of savings due to the reduced use of paper in communicating.

       There are so many benefits of data communications. Improved quality of life increasingly requires people to perform various activities required to optimize its resources. Information and Communication Technology development is so fast that it does not directly require people to use it in all its activities. Some application of data communication, among others in the company, business, banking, education, and health.

Some communication Application Data :

1. Application of Data Communication in Companies

       The application of data communication is widely used by usahawan.Kebutuhan time and cost efficiency led to any businesses feel the need to apply information technology in the work environment. Communication technology application causes a change in work habits. For example the application of Enterprice Resource Planning (ERP). ERP is a software application that includes the company's management system.

2. Implementation of Data Communication In Business World

       Communication used in the business world to trade electronically or known as E-Commerce. E-Commerce is a trade using the internet communication network.

3. Application of Data Communication in Banking

        In the banking world Communication is the application of banking transactions via the Internet, known as Internet Banking. Some transactions can be done via Internet Banking, among others, transfer money, check balances, transfer funds, pay bills and account information.

4. Application of Data Communication in Education

      Learning technologies had been developed seirng the times. In the implementation of learning daily paper Information and Communication Technology is often encountered combination of audio technology / data, video / data, audio / video, and internet. The Internet is a cheap communication tool which allows the interaction between two or more people. Capabilities and characteristics of the internet allows the process of distance learning (E-Learning) is becoming more effective and efficient in order to obtain better results.

5. Implementation of Data Communication in Health

      System-based smart card (smart card) medical interpreter can be used to determine the history of illness of patients who come to the hospital because the card of the medical interpreter can determine the patient's medical history. The use of robots to assist in the surgery and the use of three-dimensional computer imaging results to show the location of the tumor in the patient's body.

6. Application of Data Communication Against social life

      The process of using information and communication technology is the basis for emerging and known as the Information Society. Informatics community involved more than just the adoption of information and communication technology in it, but participated in the application of information and communication technologies for the benefit of local communities. Informatics society confronts not only the technology, but also a social idea, known as social capital. Informatics community has also introduced a new dimension to the concept of division of community based cultural capital and social class stratified society.

      As an academic, community resources and informatics take participants from a series of backgrounds, including Computer Science, Management, Information and Library Science, Planning, Sociology, Education, Social Policy and Research Rural, Regional and Development.

As a practice, community informatics is of interest to those concerned with the Community Development and Local Economic Development in Developing Countries as well as forward and has a close relationship with those who work in areas such as Community Development, Community Economic Development, Health Informatics Community Based Adult Education and Advanced.

      Informatics community is part of the fabric of society in the emerging world and has a role in some fundamental level in a thriving community. Informatics society can be described as the use of information and communication technology for the practice of community, which is defined by the Glen (1993) as a public service delivery, and community action. In particular, public practice is increasingly considered fundamental to social problems because people in a place facing the modern trading world less been the subject of state / nation.

   Communication has played a key role in developing and maintaining community kesehjateraan geographically throughout history. Information Society is a recent phenomenon in the modern network society, can be tracked by the proponent of public communication late 1980 until early 1990.

From the beginning, the main goal is to use the technology community infrastructure, applications, and information and communication services to empower and preserve the local community social capital (networks, organizations, groups, activities, and values ​​that underlie public life).

7. Implementation of Data Communication Against Schools Learning

      We must know that in order to utilize ICT in learning is not as easy as dibayangkan.Perlu several requirements that must be met in order to realize the use of ICT in learning, including:

-Adanya Internet access technology for teachers and students, both in the classroom, school, and teacher education institutions,

-Adanya Quality materials for teachers and students,

-Teacher Need to be productive on the development of ICT.

USE GENERAL DATA COMMUNICATIONS

General usage data communications classified in several fields, namely:

a. Field of Data Collection (Data Collection)

Data were collected from several places (Remote station), is stored in memory and on time ,certain period of time the data will be processed.

Example: Application system inventory, payroll, etc.

b. FAQ field (Inquiry and Respone)

Users can access directly to the program or file. The data is sent to the computer system is immediately processed and the results can be given immediately. Users can access directly to the file / program. The data is sent to the computer system can be directly processed and the results can be immediately given. When users conduct a dialogue with computer then this kind of system is called interactive.

Example: aplikaasi banking.

c. Field Storage and Retrieval

Data previously stored in the computer can be retrieved at any time by the parties concerned.

Example: Messege Application Switching and Electronic Mail, such as the delivery of letters, documents or memos electronically.

d. Time Sharing

Several users can work on the program together.

Example: Application usage of computer systems together for the development of software (software), engineering calculations, word processing (word processing), CAD (Computer Aid Design), etc.

Time sharing system is a technique using the online system by several users alternately according to the time it takes users. CPU processing time due to the development of faster, while the tool Input / Output can not keep pace with the speed of the CPU, the speed of the CPU can be used efficiently by serving some of the tools I / O interchangeably

 

Pictures: Time Sharing

One use of time-sharing system can be seen in the use of a terminal at a bank teller. When a customer comes to the bank to save money or take money, then the savings book is placed on the terminal. And by the operator at the terminal is recorded via the keyboard (the keyboard), then the data is sent directly to the computer center, process, calculate the amount of money as you see fit, and print it on the savings book to transactions that had just done.

e. Field Remote Job Entry

Remote terminal sends job programs or data (text) to be saved to a central computer where the data is processed.

Example: Applications that use the computer system equipment ancillary equipment contained in a distant place.

The data collected will be sent in advance and simultaneously transmitted to a central computer for processing. Because the data is collected (batch) first in one period, then the way is called a processing system with batch processing system. Results of general data processing in computer centers and can not be directly once produced, because the central computer must simultaneously process a large enough data set. In the picture can be seen form the system works.

 

Picture: Remote Job Entry System Work

f. Field of Real Time Data Processing and Process Control

The desired process results in accordance with the interests of the process (realtime).

Example: Application settings industrial equipment, process control systems, telecommunication systems and others.

A realtime system makes it possible to transmit data to a central computer, are processed at the computer center immediately upon the data received and later transmit the results back to the sender of the data processing on the spot. American Airlines is a company that was first pioneered this system. With this system realtime, passenger airplane from an airport or a particular agent can book tickets for a particular flight and get a result less than 15 seconds, just to find out if there are seats on the plane or not.

g. Field of Data Exchange Between Computers

The exchange of data in the form of programs, files, etc. The exchange of data in the form of programs, etc. files between computer systems. At this data applications exchanged numerous and shorter once the desired time.