NETWORK WORLD NEWSLETTER: STEVE TAYLOR AND JOANIE WEXLER ON WIDE AREA NETWORKING 09/07/04 Today's focus: How AAL1 helped converge networks
Dear [EMAIL PROTECTED], In this issue: * The operational efficiency of AAL1 * Links related to Wide Area Networking * Featured reader resource _______________________________________________________________ This newsletter is sponsored by Allot Communications AN OFFER YOU CAN'T REFUSE - IT'S FREE For a limited time only, Allot Communications is offering qualified companies a free, on-site evaluation of the world's most powerful traffic management solutions. Let us show you firsthand why our products have quickly become "the brains behind some of the world's most advanced networks." Click here to request your evaluation today: http://www.fattail.com/redir/redirect.asp?CID=79179 _______________________________________________________________ A New Network World Technology Tour Event - VoIP : The New Age Begins VoIP: It's here. No longer the future of telephony, it's the new business reality. And the key question now is "how." The answers are at this new Technology Tour Event coming to Houston 9/21, Chicago 9/21, Palo Alto 9/23 and Philadelphia on 9/29. Click, qualify and attend FREE! http://www.fattail.com/redir/redirect.asp?CID=80180 _______________________________________________________________ Today's focus: How AAL1 helped converge networks By Steve Taylor and Joanie Wexler As we saw last week, one trend is clear: As raw bandwidth has become less expensive over the past two decades, the emphasis on using every possible bit-per-second of that bandwidth has likewise diminished. Instead, other considerations that relate more to the overall efficiency of network operations have taken precedence. A first example of this comes from the development of ATM Adaptation Layer 1 (AAL1). AAL1 was designed for the transport of information in which there is an exact timing relationship that must be maintained between the source and the receiver. This traffic tends to be constant-bit-rate, connection-oriented traffic. Of course, the most obvious example of a type of traffic that fits this description is traditional, pulse code modulation voice. But why, especially in a pre-VoIP era, was this even considered? Network efficiency. The traditional WAN was a TDM network designed originally for transporting voice conversations. For years, we shoehorned data onto this network until the first broadband packet ATM-based networks were deployed. This resulted in parallel networks that were inefficient no matter how you define efficiency. At the same time, it was recognized that it would take a long time for traditional voice nets to go away. Consequently, while AAL1 was extremely inefficient from the perspective of bandwidth utilization, having the capability to run traditional voice over the newer data-centric networks provided great "network efficiency" in terms of maintaining a single network. So while there's an extent to which bandwidth efficiency is important, operational efficiency clearly won out. Next time we'll wrap up this discussion with an even more extreme example of operational efficiency. RELATED EDITORIAL LINKS "ATM Details" (abstract and link to Webtorials seminar) http://www.webtorials.com/abstracts/ATM%20Details.htm How VoIP relates to the PSTN Network World Convergence Newsletter, 08/11/04 http://www.nwfusion.com/nlwan562 TDM transport over MPLS using AAL1 http://www.mplsforum.org/tech/tdm_ia_4.0.pdf _______________________________________________________________ To contact: Steve Taylor and Joanie Wexler Steve Taylor is President of Distributed Networking Associates and Publisher/Editor-in-Chief of Webtorials.Com. For more detailed information on most of the topics discussed in this newsletter, connect to Webtorials.Com <http://www.webtorials.com/>, the first Web site dedicated exclusively to market studies and technology tutorials in the Broadband Packet areas of Frame Relay, ATM, and IP. He can be reached at <mailto:[EMAIL PROTECTED]> Joanie Wexler is an independent networking technology writer/editor in California's Silicon Valley who has spent most of her career analyzing trends and news in the computer networking industry. She welcomes your comments on the articles published in this newsletter, as well as your ideas for future article topics. Reach her at <mailto:[EMAIL PROTECTED]>. _______________________________________________________________ This newsletter is sponsored by Allot Communications GET THE TRAFFIC MANAGEMENT HANDBOOK - IT'S FREE Allot Communications is pleased to announce the availability of an insightful and informative new resource - The Traffic Management Handbook. As a networking/IT professional, you can receive this valuable resource FREE OF CHARGE. To subscribe to this exciting new electronic publication NOW, click here: http://www.fattail.com/redir/redirect.asp?CID=79177 _______________________________________________________________ ARCHIVE LINKS Archive of the WAN newsletter: http://www.nwfusion.com/newsletters/frame/index.html _______________________________________________________________ FEATURED READER RESOURCE CHECK OUT NW FUSION'S NEW WHITE PAPER LIBRARY NW Fusion's White Paper Library was recently re-launched with new features and improved capabilities! Sort NW Fusion's library of white papers by Date and Vendor, view white papers by TECHNCIAL CATEGORY, mouse over white paper descriptions and take advantage of our IMPROVED white paper search engine. CLICK HERE: <http://www.nwfusion.com/vendorview/whitepapers.html> _______________________________________________________________ May We Send You a Free Print Subscription? 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