THE WHATIS.COM WORD-OF-THE-DAY July 31, 2003 ESMR
________________ SPONSORED BY: Microsoft The Quick Guide to Windows Server 2003. Get the latest information on installation, new features and training. Click here! http://WhatIs.com/r/0,,16717,00.htm?microsoft ________________ TODAY'S WORD: ESMR See our complete definition with hyperlinks at http://searchmobilecomputing.techtarget.com/sDefinition/0,,sid40_gci499531,00.html ESMR (Enhanced Specialized Mobile Radio) is a wireless communication system in which numerous mobile/portable transceivers are linked in a network of repeaters. Each repeater has a range of approximately 5 to 10 miles. Operating frequencies are in the UHF (ultra-high-frequency) range, that is, between approximately 300 MHz and 3 GHz. Usually, the working band is near 900 MHz. ESMR can function like its fundamentally simpler cousin, SMR, but it can also offer features similar to those of a cellular telephone network. The PTT (push-to-talk), half-duplex mode can be used; in this case the operation resembles communications between old style two-way radios. Full-duplex mode can also be used, so either party can listen and talk at the same time. Interconnection with the telephone networks is commonly done. In addition to voice communication, an ESMR system can offer paging, wireless fax, and data transmission. ESMR systems use digital radio transmission. Spread-spectrum modes, such as frequency hopping, are common. In a well-designed ESMR system, connection is almost instantaneous, compared with the typical 15 to 20 seconds required to dial and set up a call in a public cellular network. The coverage of an ESMR system depends on the geographical distribution and needs of the users. Some systems are confined to single municipalities; others cover selected groups of metro areas; others operate over entire states or regions of a country. Examples of ESMR networks include Ericsson's EDACS (Enhanced Digital Access Communications System), Motorola's IDEN (Integrated Dispatch Enhanced Network), and the Nextel System. ______________________ RELATED TERMS: Specialized Mobile Radio http://searchmobilecomputing.techtarget.com/sDefinition/0,,sid40_gci499515,00.html repeater http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci212890,00.html half-duplex http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci212221,00.html full-duplex http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci212166,00.html ______________________ SELECTED LINKS: VegaComm offers consulting services for SMR and ESMR. http://www.vegacomm.com/SMR.htm Ericsson's EDACS page provides more information. http://www.ericsson.sk/ericsson/ponuka.asp?ref=edacs_eng ______________________ TODAY'S TECH NEWS: IBM BOOSTS LINUX OFFERINGS IBM today unveiled its new DB2 on Linux integrated environment, and bragged that it can do more and scale higher than Oracle's Linux offering. http://searchdatabase.techtarget.com/originalContent/0,289142,sid13_gci916969,00.html CERT CREATES INCIDENT-RESPONSE CERTIFICATION IT security is becoming more specialized, and the Computer Emergency Response Team has reacted with its first certification, one that addresses incident response and handling. http://searchsecurity.techtarget.com/originalContent/0,289142,sid14_gci916903,00.html NOTES 6.5 TO SUPPORT MAINFRAMES RUNNING LINUX IBM said that Domino/Notes 6.5 will include support for Linux on the mainframe. The new version will also support the Domino Web Access client via the open-source Mozilla browser. http://searchdomino.techtarget.com/originalContent/0,289142,sid4_gci916979,00.html >> Catch up on all the latest IT news at http://searchtechtarget.techtarget.com/ ______________________ Information Kit | Linux, Unix, and all the little ixes Get up to speed quickly, and be the Linux/Unix Know-IT-All at your office. http://whatis.techtarget.com/definition/0,,sid9_gci915803,00.html ______________________ Secret Word-of-the-Day | What is it? On the Internet, this is a personal journal intended for general public consumption. >> Click for correct answer http://searchwebservices.techtarget.com/sDefinition/0,,sid26_gci214616,00.html _____________________ Quiz #5 | General IT terms Do you know how the Internet works? Take this week's quiz and find out! >> Click to take the quiz http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci553879,00.html ______________________________ RECENT ADDITIONS AND UPDATES [1] initial extent http://searchdatabase.techtarget.com/sDefinition/0,,sid13_gci916333,00.html [2] block http://searchdatabase.techtarget.com/sDefinition/0,,sid13_gci916318,00.html [3] bias http://whatis.techtarget.com/definition/0,,sid9_gci914376,00.html [4] cache cramming http://searchsecurity.techtarget.com/sDefinition/0,,sid14_gci914394,00.html [5] Government Information Awareness http://searchcio.techtarget.com/sDefinition/0,,sid19_gci914344,00.html ____________________________________________________________________ ::::::::::::::::::: WHATIS.COM CONTACTS ::::::::::::::::::: LOWELL THING, Site Editor ([EMAIL PROTECTED]) ____________________________________________________________________ MARGARET ROUSE, Associate Editor ([EMAIL PROTECTED]) ::::::::::::::::::::: ABOUT THIS NEWSLETTER :::::::::::::::::::::: This newsletter is published by TechTarget, the most targeted IT media. http://www.techtarget.com Copyright 2003 TechTarget. 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