This book is the perfect solution for those involved or interested in the operation of telecom devices, networks, and service providers. This reference book explains the latest technologies and applications used in the telecom industry, assists with the explanation of technologies by using many diagrams and pictures. It is a great reference tool that allows people to effectively communicate with other people involved in the telecom industry.
The convergence of technologies and systems means more competitors and more....
Sample Definitions and Diagrams
This diagram shows a private branch exchange (PBX) system. This diagram shows a PBX with telephone sets, voice mail system, and trunk connections to PSTN. The PBX switches calls between telephone sets and also provides them switched access to the PSTN. The voice mail depends on the PBX to switch all calls needing access to it along with the appropriate information to process the call.
Back to Top
This figure shows a simplified ADSL communication system that consists of a digital subscriber line access mulitplexer (DSLAM), local distribution lines that start from a main distribution frame (MDF) wire cabinet that brings the connection to the digital subscriber line (DSL) modem at the customer's location. Modems in the DSLAM convert the digital signals from the internet to high frequency signals that travel down the telephone line to the DSL modem. The DSL modem converts the RF signals back to its original digital form so it can be provided to the customer's computer. Most DSL technologies (such as ADSL shown in this example) transmit the data information on frequencies about the audio channel. This allows for the simultaneous transmission of analog and data signals on the same telephone line. The highest frequencies are used transmission from the DSLAM to the DSL modem and frequencies just above the audio band are used to transmit from the data from the customer to the DSLAM. Typical DSL technology allows up to 6 Mbps to be transmitted to the customer and up to 640 kbps can be received from the customer.
This figure shows that the Internet is the network of networks and it communicates using the universal protocol language TCP/IP. This diagram shows a user who is sending email through the Internet. In this diagram, the application is email. The data from the email is divided into packets and given sequence number by TCP protocol. The destination address is appended to each packet by the IP layer. The IP packets are then sent through an Ethernet LAN by encapsulating the IP datagram within the Ethernet data packet. When the data packet is extracted from the Ethernet, it is placed on the E1 transmission line. When the IP data packet reaches the ATM network, it is subdivided into very small 53 byte data packets that travel through the ATM network. When the ATM packets reach their destination in the ATM network, the original IP datagram is recreated and transferred via the T1 communication line. The T1 communication line interfaces to another Ethernet data network. This Ethernet data network encapsulates the IP datagram and forwards it on to the NIC of the receiving computer. The NIC of the receiving computer removes the IP address and reassembles the IP data packets to form the original email message.
Back to Top
Table of Contents
About the Editor
Mr. Lawrence Harte has over 29 years of experience in the electronics industry including company leadership, product management, development, marketing, design, and testing of telecommunications (cellular), radar, and microwave systems. He has been issued patents relating to cellular technology. He has authored over 75 articles on related subjects and has been a speaker and panel moderator at industry trade events. Mr. Harte earned executive MBA at Wake Forest University and received his Bachelors degree from University of the State of New York. During the TDMA digital cellular standard development process, Mr. Harte served as an editor and voting company representative for the Telecommunications Industries Association (TIA) TR45.3, digital cellular standards committee. As of 2003, Mr. Harte had authored and co-authored over 20 books relating to telecommunications technology. He has served as a consultant and expert witness for leading companies including Ericsson, Siemens, VLSI, AMD, Casio, Samsung, Sony, ATT, Nokia, Hughes and many others.
This book is the perfect solution for those involved or interested in the operation of wireless devices, networks, and service providers. This reference book explains the latest technologies and applications used in the wireless industry, assists with the explanation of technologies by using many diagrams and pictures. It is a great reference tool that allows people to effectively communicate with other people involved in the wireless industry.
The convergence of technologies and systems means more competitors and
new industry terms. As a result, communicating with others has become an alphabet soup of acronyms and technical terms. The Wireless Dictionary solves this challenge by providing definitions of the latest technical terms and acronyms along with self-explanatory diagrams. This reference includes:
· Over 12,000 of the latest telecom definitions
· Contains 4,000+ of the latest industry terms and acronyms
· Has 500+ diagrams and photos to help explain complex definitions
· Includes directories of associations and trade shows
To ensure this dictionary contains the latest definitions, 12 experts were used from different sectors of the wireless industry to add and edit definitions. Many of the definitions were created using our technical books that have been edited by hundreds of industry reviewers. Diagrams and pictures in the dictionary assist the understanding of technical terms by providing functional and operational views.
back to top