THE WHATIS.COM WORD-OF-THE-DAY August 16, 2002 hundred call second ______________ TODAY'S SPONSOR: VeriSign - The Value of Trust
Secure all your Web servers now - with a proven 5-part strategy. The FREE Server Security Guide shows you how to deploy the latest encryption and authentication techniques, deliver transparent protection with the strongest security without disrupting users, and more. Get your FREE Guide now: http://WhatIs.com/r/0,,5028,00.htm?freeguide ______________ TODAY'S WORD: hundred call second See our definition with hyperlinks at http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci844795,00.html The hundred call second -- also known as the centum call second (CCS) -- is a unit of telecommunications traffic density that is the equivalent of one call (including call attempts and holding time) in a specific channel for 100 seconds in an hour. The 100 seconds need not be, and generally are not, in a contiguous block. In digital telecommunications, the voice signals are compressed. This makes it possible for one channel to carry numerous calls simultaneously by means of multiplexing. In theory, there are many ways in which a channel can carry a particular number of CCS. Here are three specific examples for a traffic density of 360 CCS: - 10 calls, each consuming the full hour during an hour - 20 calls, each of which consume 1/2 hour during an hour - 600 calls, each of which consume one minute during an hour The CCS is a more convenient unit in some applications than the erlang, which is the equivalent of one call occupying a channel for an hour. In some instances, a smaller unit than the CCS, known as the call-second, is used. One call-second is equivalent to one call occupying a channel for one second. Thus, 1 CCS = 100 call-seconds = 1/36 erlang. RELATED TERMS: channel http://search390.techtarget.com/sDefinition/0,,sid10_gci211770,00.html multiplexing http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci212614,00.html erlang http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci212073,00.html ________________________ SELECTED LINKS: Justin Junkus provides "Traffic Engineering Basics for IP Telephony." http://www.cabletoday.com/ct2/archives/0700/0700co3.htm SearchNetworking provides a white paper from Cisco about "Voice over IP Fundamentals." http://searchnetworking.techtarget.com/whitepapersLogin/1,293953,sid7_gci779212,00.html SearchNetworking has a collection of links to more about "Voice/data convergence." http://searchnetworking.techtarget.com/bestWebLinks/0,289521,sid7_tax39e,00.html ______________________ WHATIS DISCUSSION FORUM | Challenge #11: Encoding or encrypting? THE CHALLENGE: Karen, the new information security manager for a utility company, has a gut feeling that despite the lack of any previously known security breaches, her new company's sensitive customer information is vulnerable. The systems administrator has assured Karen that the data is safe because it is compressed with a private algorithm. Karen thinks he may be confusing a coding algorithm with an encryption algorithm. Should Karen speak up? >>Take the challenge http://searchsecurity.discussions.techtarget.com/WebX?[EMAIL PROTECTED]@.1dcf9d94/65!viewtype=threadDate&skip=&expand= ______________________ QUIZ #10 | iSeries(AS/400) commands Take our latest quiz and see if you can logically figure out which commands to use for specific tasks on IBM's iSeries (AS/400). Even if you've never worked with the iSeries, we bet you can figure out how to run one! iSeries (AS/400) commands http://search400.techtarget.com/sDefinition/0,,sid3_gci841205,00.html ______________________________ RECENT ADDITIONS AND UPDATES [1] logical negation symbol http://whatis.techtarget.com/definition/0,,sid9_gci843775,00.html [2] transcription error http://searchdatabase.techtarget.com/sDefinition/0,,sid13_gci843776,00.html [3] polarization http://whatis.techtarget.com/definition/0,,sid9_gci843762,00.html [4] NSFNET http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci843763,00.html [5] HDCD http://whatis.techtarget.com/definition/0,,sid9_gci843768,00.html ____________________________________________________________________ ::::::::::::::::::: WHATIS.COM CONTACTS ::::::::::::::::::: LOWELL THING, Site Editor ([EMAIL PROTECTED]) ____________________________________________________________________ MARGARET ROUSE, Assistant Editor ([EMAIL PROTECTED]) ___________________________________________________________________ :::::::::::::::::::: ABOUT THIS NEWSLETTER ::::::::::::::::::::: Created by TechTarget (http://www.techtarget.com) TechTarget - The Most Targeted IT Media Copyright 2002, All Rights Reserved. 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