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WDM
Last modified: Tuesday, September 18, 2001 

(1) Short for wavelength division multiplexing, a type of multiplexing developed for use on optical fiber. WDM modulates each of several data streams onto a different part of the light spectrum. WDM is the optical equivalent of FDM.

See DWDM

(2) Short for Windows Driver Model, a driver technology developed by Microsoft to create drivers that are source-code compatible for Windows 98, 2000, Me and XP.

WDM works by channeling some of the work of the device driver into portions of the code that are integrated into the operating system. These portions of code handle all of the low-level buffer management, including DMA and Plug and Play device enumeration. The WDM device driver becomes more streamlined with less code and works at greater efficiency.

All versions of Microsoft Windows after Windows 95 have implemented WDM. Kernel-mode drivers that follow WDM rules are called WDM drivers.

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For internet.com pages about WDM . Also check out the following links!

Related Links

WDM and high-bandwidth applications
Home page for The National Transparent Optical Network Consortium (NTONC). Contains information on wave division mulitplexing (WDM) and high-bandwidth applications (telemedicine, supercomputer-to-supercomputer, digital library, etc.)

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related categories

Fiber Optics

Multiplexing

Operating Systems

related terms

ADM

demultiplex

device

device driver

DMA

driver

EDFA

FDM

fiber optics

GBIC

Microsoft Windows

multiplex

OFDM

optoelectronics

TDM


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