NETWORK WORLD NEWSLETTER: STEVE TAYLOR AND JOANIE WEXLER ON WIDE 
AREA NETWORKING
09/09/04
Today's focus:  Operational efficiency wins

Dear [EMAIL PROTECTED],

In this issue:

* In example of operational efficiency, GDC puts legacy 
��protocols onto new networks
* Links related to Wide Area Networking
* Featured reader resource
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Today's focus:  Operational efficiency wins

By Steve Taylor and Joanie Wexler

In recent articles, we've seen that protocol efficiency seems to 
have diminished in importance and has given way to multiple 
other issues. Take, for example, some interesting products 
recently introduced by General DataComm that would have totally 
defied all logic a few years ago. These products are designed 
for transporting legacy asynchronous and synchronous traffic 
over Ethernet and IP.

With GDC's new SpectraComm ADT and SDT products, any older 
equipment that is not IP-enabled can be connected over an 
Ethernet and IP backbone. This is especially attractive in 
industrial environments, where process-control equipment has a 
considerably longer life cycle than your typical PC.

The ADT products are designed for transporting asynchronous 
traffic, while the SDT transports byte-synchronous High-level 
Data Link Control (HDLC) and Synchronous Data Link Control 
(SDLC) traffic. Additionally, contact closures can be monitored 
for telemetry applications.

>From a bandwidth-efficiency perspective, this is a bit curious. 
You're taking traffic from protocols like SNA and even frame 
relay that were designed to be quite efficient. Then you're 
putting that traffic into an overhead-heavy IP packet. And then 
you're putting that information into an Ethernet frame. So you 
end up with a two-ounce candy bar in five pounds of packaging.

Nevertheless, this is quite attractive in today's environment. 
LAN bandwidth is already almost free, and WAN bandwidth is 
getting much less expensive. And legacy equipment, having been 
optimized for an earlier time, uses a relatively low amount of 
bandwidth - to the extent that the vast majority of the legacy 
traffic almost becomes background noise on current nets. 

What's much more important is that the current data network can 
be used to transport the legacy traffic along with current 
applications, obviating the need for separate nets.

RELATED EDITORIAL LINKS

General DataComm SpectraComm SDT and ADT
http://www.gdc.com/products/prod_ip.shtml

WAN optimization on the rise
Network World Network Optimization Newsletter, 06/01/04
http://www.nwfusion.com/newsletters/accel/2004/0531netop1.html
_______________________________________________________________
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 SBC 
Dialing for Dollars 
CRATE & BARREL'S VOIP MOVE NETS SAVINGS AND FLEXIBILITY 

An apples-to-apples comparison showed that a centralized, 
software-based, IP-based platform could provide significant cost 
savings and productivity benefits over a comparable, traditional 
PBX system.  Download whitepaper now, click here 
http://www.fattail.com/redir/redirect.asp?CID=79139
_______________________________________________________________
ARCHIVE LINKS

Archive of the WAN newsletter:
http://www.nwfusion.com/newsletters/frame/index.html
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FEATURED READER RESOURCE
NETWORK WORLD SPECIAL REPORTS NOW AVAILABLE

Focused reports on compelling industry topics, Network World 
Special Reports are available online at Network World Fusion. 
Network World Special Reports on IP Telephony Security, the 
State of Wireless LANs, trends in the networked world and more 
are currently available. Download any or all of our Special 
Reports at:
<http://www.nwfusion.com/vendorview/specialreports.html>
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