N-GEN Communications Web-based Seminars ©NGCS

Seminar - An Overview of Communications Technologies

Module 2 - Data Communications Basics and Legacy Technologies                                                Slide 18 of 45 _________________                                                                                  __________

                                 A Communications Systems Elements

                                                     CPE

                                                     DCE

                                                     DTE

                                                     Computer Communications System

                                                     Data Communications System

_________________                                                                                  __________

Computer Communications is the end-to-end solution to the customers application. It includes Customer Premise Equipment (CPE) and  data communications system. Data communications system includes Data Communications Equipment (DCE) and data communications network.

Customer Provided Equipment (CPE) - A computer system and a Local Area Network (LAN) are examples of the CPE. Customer applications and required protocols (OSI layers), to communicate application to the other end, are located in the CPE.

Data Communications Equipment (DCE) - A modem and a multiplexer are the examples of the DCE. The data terminal uses DTE interface to connect to the DCE interface in the Data Communications Equipment.

Data Communications System - A data communications system includes the DTE transferring binary data to the data communication equipment, communications medium and related equipment and at the remote end communications equipment transferring binary data to the DTE.