N-GEN Communications Web-based Seminars ©NGCS

Seminar - An Overview of Communications Technologies

Module 2 - Data Communications Basics and Legacy Technologies                         Slide 7 of 45 _________________                                                                                  __________

                         Building Blocks - Information Communications Codes

                                            Codes

                                            Characters

                                            Signaling Elements

                                            Protocols

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Codes, Characters, Signaling Elements and Protocols play a major role in the information communications between devices.

Codes -  represent meaning between signaling and character sets. Codes are represented in ones and zeros (binary format). In ASC II standard, character A is represented by 101.

Characters - the letters, numerals, spaces, other signs and symbols appearing on the computer key board, and control characters.

Signaling Elements - A character representation sent over a transmission channel. Character A is sent as 001000001 over the channel.

Protocol - Agreed upon rules for communicating information between two systems or processes.