TABLE OF CONTENTS Level: 3
Definition: A type of traffic on an ATM network that is not considered time critical, UBR data is transferred with an unspecified bit rate using whatever bandwidth is available at any given time. In this sense, UBR transmissions are similar to IP service. UBR traffic is given a best effort priority in an ATM network. (See also ABR, CBR, and VBR.)
Level: 3
Definition: UDDI is an open framework for describing or listing services on the Internet. Based on the W3C s XML standard and closely integrated with SOAP, UDDI provides three types of listings: White Pages, which include address, contact, and other known identifiers; Yellow Pages, which include industrial categorizations based on standard taxonomies; and Green pages, which include information about the technical means to access services offered by a particular company. (See also SOAP and XML.)
Level: 2
Definition: The portion of the radio frequency spectrum ranging between 300 MHz and 3 GHz. The UHF band is used for transmission of television broadcast channels 14 through 67. Previously allocated television channels 68 through 83 have been reassigned for use as cellular telephone services, except for a few special cases. TV channels 52 through 69 are to be auctioned for other uses once the conversion to digital TV has been completed. UHF is also used for two-way radio communication and for cordless telephones.
