W

WAN - Wide Area Network
    Remote computer communications system. WANs allow file sharing among geographically distributed
    workgroups (typically  at higher cost and slower speed than LANs or MANs). WANs typically use
    common carriers' circuits and networks. WANs  may serve as a customized communication
    "backbone" that interconnects all of an organization's local networks with  communications trunks
    that are designed to be appropriate for anticipated communication rates and volumes between nodes.

Waterfall Cabling
    A method of routing cables between overhead cable racks and the DSX panels, that employs the
    full width of the rear of the DSX frame, as opposed to just the area between the flanges or
    adjacent bays.

WATS - Wide Area Telephone Service
    Flat rate, or special rate pay-by-the-minute (measured) billing for a specified calling area. May be
    outbound or inbound (e.g.  800).  A bulk-rate long-distance telephonen service offering.

WDM - Wavelength Division Multiplexing
    Simultaneous transmission of several signals in an optical waveguide at differing wavelengths.

Wideband
    A medium-capacity communications Circuit/path. It usually implies a speed from 64Kbps to
    1.544Mbps.

Wire Center
    The building in which one or more local switching systems are installed and where the outside
    lines, or wires, leading to customer premises are connected to the central office equipment.
    (Also known as a Service Wire Center.)

Wireless
     Radio waves, cellular, satellite, microwave, etc. No physical transmission path.

WTN - Working Telephone Number
    Means what it says.

World Wide Web (WWW)
    Internet system for world-wide hypertext linking of multimedia documents, making the relationship
    of information that is  common between documents easily accessible and completely independent
    of physical location.