Webopedia on Google+Webopedia on TwitterWebopedia on FacebookTech Bytes Blog
Main » TERM » D »

DWDM


Short for Dense Wavelength Division Multiplexing, an optical technology used to increase bandwidth over existing fiber optic backbones.

DWDM works by combining and transmitting multiple signals simultaneously at different wavelengths on the same fiber. In effect, one fiber is transformed into multiple virtual fibers. So, if you were to multiplex eight OC -48 signals into one fiber, you would increase the carrying capacity of that fiber from 2.5 Gb/s to 20 Gb/s. Currently, because of DWDM, single fibers have been able to transmit data at speeds up to 400Gb/s.

A key advantage to DWDM is that it's protocol- and bit-rate-independent. DWDM-based networks can transmit data in IP, ATM, SONET /SDH, and Ethernet, and handle bit rates between 100 Mb/s and 2.5 Gb/s. Therefore, DWDM-based networks can carry different types of traffic at different speeds over an optical channel.

From a QoS standpoint, DWDM-based networks create a lower cost way to quickly respond to customers' bandwidth demands and protocol changes.







TECH RESOURCES FROM OUR PARTNERS
DID YOU KNOW?
Small Business Technology Then and Now

Technology for small business has changed a lot in the last decade. But as technology evolves, so do the challenges. Read More »

Windows XP: Move Along, There's Nothing to See Here

After more than 12 years of holding the title of most popular operating system in the world, Windows XP is taking center stage for its final... Read More »

Report: The Role of Big Data in the Marketing Industry

According to a new study from Infogroup Targeting Solutions, we can expect to see companies spend heavily on big data marketing initiatives in... Read More »

QUICK REFERENCE
Flash Data Storage Vendor Trends

Although it is almost impossible to keep up with the pace of ongoing product releases, here are three recent highlights in the flash data storage... Read More »

15 Important Big Data Facts for IT Professionals

Keeping track of big data trends, research and statistics gives IT professionals  a solid foundation to plan big data projects. Here are 15... Read More »

Enterprise Storage Vendors

There's a number of vendors that sell enterprise storage hardware or offer cloud-based enterprise storage. View Webopedia's Enterprise storage... Read More »