Technology Reviews from KnowledgeLink, Inc.

KnowledgeLink has written detailed descriptions of several communications technologies. The table below is a partial listing.

Review Topic Description
Access network protocol:  X.25 and Frame Relay Discussion of how the X.25 and Frame Relay data protocols format and move information through Wide Area Networks
Analog to digital conversion Overview of the three step process to convert information in an analog format (eg: speech, graphics) to a digital format for computer processing
Asynchronous Transfer Mode Discussion of how information is formatted and transported using the ATM cell relay protocol
Circuit Switched HFC telephony Technical overview of one of the methods used by cable companies to offer their subscribers telephone service, including the hardware required in a cable telecommunications system.
Computer telephony integration Discussion of how computers and telephone systems work together in business and consumer systems.
Conditional access and security Overview of the technologies used in a cable telecommunications system to secure access to pay-per-view, premium channels and electronic commerce.
Data communications protocols Discussion of the rules for data communications, including the 7 layer OSI model and the IP protocol used by the Internet.
Digital compression Discussion of techniques for expanding the capacity of the media used to transport digital information.
Digital set top converters Overview of the technology of digital set top converters, and how to connect a typical cable set top converter to a home entertainment center.
Digital telecommunications switch function and architecture High level discussion of central office telecommunications digital switches and how they process and route telephone calls.
Error detection and correction Techniques for detection and correction of errors in digital transmissions between devices on a network.
Headend video processing Overview of the systems used in a cable telecommunications network to process and route digital video programming.
High speed data in cable Discussion of the technologies and equipment used in a cable telecommunications system to provide end user data service at speeds up to 10 Mbps.
Home Networks Consumer choices for networks in their homes to connect computers, printers and other devices.
Intelligent networks Overview of the telecommunications technology that provides features like caller identification and number portability.
IP Telephony Discussion of the technologies that make it possible to use the Internet and other data networks to make telephone calls.
Local area networks How local area networks are built and connected. Overview of Ethernet, Token Ring and other network architectures.
Modems and modulation How modems work
MPEG-2 Overview of the MPEG-2 technology that is used to encode and transport digital information.
MPEG-2 testing Overview of the ways to test a network for the ability to accurately transport MPEG-2 digital information.
Multiplexing and bandwidth management How one wire or fiber can transport multiple channels of information.
Network architectures Differences and similarities of local area networks, wide area networks and backbone networks; how these networks interconnect to form an internet.
Network management Discussion of the systems that manage the networks used to move information in telephone, data and television systems, and how they must interface with customer-related information.
Number portability Description of the system that allows subscribers to keep their phone nunbers when they change telephone companies.
PBX and key systems technology and architecture Overview of business telephone systems.
SONET Detailed discussion of SONET multiplexing.
Telecommunications switch features Definition of the major features found in business and residential digital telephony switches.
Telephony central office components Text-based tour of the building and equipment that provides telephone service.
Telephony local loop technologies Overview of the connection from the telephone central office or cable company headend to the subscriber's location.
Telephony signaling Discussion of the control signals that cause a telephone call to be connected and billed.
Testing digital cable systems Introduction to testing digital cable systems to ensure their readiness to transport digital content.
Video servers and applications Overview of the equipment that makes video on demand and targeted advertising possible.
Voice messaging Overview of the technologies used by a service provider to offer voice mail, paging and unified messaging services.
Wireless Technologies Overview of several technologies used to provide wireless communications.

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