DIGITAL COMMUNICATIONS

Network Protocols in Digital Communication

Network Protocols in Digital Communication: “Intelligent” (microprocessor-controlled) switching systems have become the hubs of intelligent networks. Terminal devices and line connection equipment have also been given microprocessor “brains,” and thus the introduction of intelligent devices into the data communications field has brought a sophistication to the interconnection possibilities. With terminals capable of establishing circuit connections […]

Switching Systems in Digital Communication

Switching Systems in Digital Communication: If only two sites are to be connected, switching is not required. The two facilities are interconnected on a point-to-point basis. However, switching is likely to be required where three or more sites need to be interconnected. The various types of Switching Systems in Digital Communication described earlier can all […]

Centralized Switched Telephone Network

Centralized Switched Telephone Network: Centralized Switched Telephone Network – As data systems have increased in number and complexity, it has become increasingly important to provide for their proper and orderly interconnection. Small, simple systems could dedicate individual lines for each piece of equipment which was connected in the system. For intraplant connections, this was a […]

Error Detection and Correction Codes

Error Detection and Correction Codes: Error Detection and Correction Codes – Errors enter the data stream during transmission and are caused by noise and transmission system impairments. Because errors compromise the data and in some cases render it useless, procedures have been developed to detect and correct transmission errors. The processes involved with error correction […]

Characteristics of Data Transmission Circuits

Characteristics of Data Transmission Circuits: Bandwidth Requirements – Characteristics of Data Transmission Circuits is the most instances consists of pulse-type energy. The data stream is similar to a square-wave signal with rapid transitions from one voltage level to another, with the repetition rate depending on the binary representation of the data word. For instance, if […]

Digital Electronics Basics

Digital Electronics Basics: Digital devices are based on Digital Electronics Basics circuits which can represent two states, ON or OFF. The ability to design integrated circuits consisting of thousands of transistors on wafer-thin; postage-stamp-sized chips has made Digital Electronics Basics both feasible and extraordinarily powerful. The chants are used to store, evaluate, manipulate and modify […]

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